Hire the best Objective-C developers

Check out Objective-C developers with the skills you need for your next job.
Clients rate Objective-C developers
Rating is 4.8 out of 5.
4.8/5
based on 4,104 client reviews
  • $80 hourly
    Senior iOS Developer Fundamentals: Master Degree of Computer Science 10+ released projects 7+ years of iOS development experience 2+ years of Project Management experience (side, pet projects) Professional skills: - Highly proficient in object oriented methodologies, design patterns, data structures, algorithms, quality coding skills and excellent debugging skills; - Expert iOS platform mobile application development skills with a proven record of creating commercial quality software. Preference for Swift skills; - Debugging skills with proven experience in Xcode, Instruments and other performance analysis tools; - Strong experience and skills developing Swift and Objective-C iOS applications with Xcode; - Proven working experience with Apple products and services; - Strong problem-solving skills by identifying and correcting bottlenecks and fixing bugs. - Effective English communication skills.
    Featured Skill Objective-C
    Apple Xcode
    iPhone UI Design
    Smartphone
    iOS
    Realm Database
    Swift
    Firebase
    JSON
    iOS SDK
    Core Location
    Cryptography
    UIKit
    iOS Development
  • $45 hourly
    I'm very passionate about programming and i like creating creating applications that people like using. I have experience of working on products of well known companies.
    Featured Skill Objective-C
    iOS Development
    Android App Development
    MongoDB
    Node.js
    JavaScript
    Swift
  • $20 hourly
    ๐ŸŒŸ Elevate Your iOS, iPhone, iPad, and macOS Development Projects with a Proven Expert! ๐ŸŒŸ ๐Ÿ”น Over a Decade of Mastery in Crafting Digital Excellence for Apple Platforms โœ… 50+ Successful Mobile Apps Delivered for iOS, iPhone, iPad, and macOS โœ… 4200+ Hours of Top-Tier Development Across 47+ Projects โœ… POS Expert โ€“ Built a custom Point-of-Sale (POS) system for a Canada-based pizza chain, deployed in 125+ stores ๐Ÿ”น Why Choose Me? โœจ End-to-End Development โ€“ From concept to App Store deployment โœจ Agile/SCRUM Pro โ€“ Reliable, iterative, and transparent workflows โœจ Deep Platform Expertise โ€“ iOS, iPhone, iPad, macOS, Swift, Objective-C, SwiftUI โœจ Industry-Specific Solutions โ€“ FinTech, Healthcare, E-commerce, Social Media, POS, and more ๐Ÿš€ My Specializations: ๐Ÿ“ฑ App Development Expertise โœ” Social/Dating Apps โ€“ Video/audio chat, real-time messaging (WebRTC, Twilio) โœ” E-Commerce & Marketplaces โ€“ Payment gateways (Apple Pay, Braintree), cart systems โœ” On-Demand Apps โ€“ Ride-hailing, food delivery, home services โœ” Health & Telemedicine โ€“ HIPAA-compliant data, appointment booking โœ” Live & Video Streaming โ€“ Low-latency streaming (Agora, ZegoCloud) โœ” FinTech & Banking โ€“ Secure transactions, KYC integration โœ” Augmented Reality (ARKit) โ€“ Interactive AR experiences โœ” POS Systems โ€“ Custom-built for retail, restaurants, and multi-location businesses ๐Ÿ’ก Technical Skills & Tools Languages: Swift, Objective-C, SwiftUI Architecture: MVVM, MVP, MVC, Clean Architecture Backend Integration: Firebase, REST, GraphQL, WebSockets (Socket.IO) AI & Chat: OpenAI API, ChatGPT, CometChat SDK Payments: Apple Pay, Stripe, Braintree, Moneris, In-App Purchases Testing: XCTest, UI Automation, CI/CD (Fastlane, Jenkins) Security: Biometrics, OAuth2, End-to-End Encryption ๐Ÿ”ง Advanced Integrations Real-Time Features: WebRTC, Live Streaming, VOIP (Linphone, Sinch) Maps & Location: Google Maps, Mapbox, Geofencing, Beacons Analytics & Crash Reporting: Firebase, Crashlytics, New Relic Push Notifications: Firebase Cloud Messaging, OneSignal Database: CoreData, Realm, SQLite ๐ŸŽฏ Industries Iโ€™ve Worked In: Retail & POS โ€“ Custom checkout systems, inventory management Food & Beverage โ€“ Delivery apps, POS for restaurants Healthcare โ€“ Telemedicine, fitness tracking Finance โ€“ Mobile banking, investment apps Travel โ€“ Airline & hotel booking platforms Social Media โ€“ Dating apps, audio/video communities ๐Ÿ’ผ Notable Projects: โœ” POS System for 125+ Stores โ€“ Custom-built for a Canadian pizza chain โœ” Live Video Social App โ€“ 1M+ downloads, WebRTC integration โœ” Banking App โ€“ Secure transactions, biometric login โœ” AI-Powered Wellness App โ€“ ChatGPT integration for personalized coaching ๐Ÿ“ฉ Letโ€™s Build Something Remarkable! Iโ€™m fluent in English and passionate about turning your vision into a high-performance Apple app. Whether you need a startup MVP or a large-scale POS solution, Iโ€™ve got you covered. ๐Ÿ‘‰ Get in touch todayโ€”letโ€™s discuss your project!
    Featured Skill Objective-C
    AI App Development
    Google Maps API
    Push Notifications
    VoIP
    Firebase
    Map Integration
    Chat & Messaging Software
    Swift
    Mac OS App Development
    macOS
    iPhone
    iOS
    iOS Development
  • $35 hourly
    Hello. Shortly my name is Olex. Iโ€™m mobile developer with more than 7 years of experience in the field of mobile development and more than 10 years of programming in general. I believe that my strongest skill is making things done. How? Responsibility and creativity, thinking about whole the project, not only codebase. And I like to finish my work, finish applications or features. I always think about my clients needs for first even if it's not best for me. I also care about end-user experience and always share my ideas or doubts about a project I make. I'm honest and fair. I'm confident and I'm actively using AI in my work that helps me to fasten my work up to 20%. Listed below are my experience and skills: I work mostly as front-end mobile application developer on platforms: โ€ข iOS, WatchOS, โ€ข Android, โ€ข Hybrid. I work as back-end developer using SAAS solutions: โ€ข Firebase โ€ข Amazon Web Service I use programming languages and frameworks as follows: โ€ข Swift, Objective-C - as native iOS development, โ€ข Kotlin, Java - as native Android development, โ€ข Flutter & Dart - for hybrid development. โ€ข React Native & Javascript or TypeScript - for hybrid development โ€ข NodeJS & Javascript - for back-end development โ€ข Python - for bak-end development I worked with most of mobile technologies and frameworks: โ€ข UI/UX - SwiftUI, UIKit, WatchKit, Lottie files, โ€ข Image creation, changing/processing - CGGraphics, CGAnimation, โ€ข Working with data - CoreData, Keychain, โ€ข Video creation, changing/processing (on the fly as well), streaming - AVFoundation, WebRTC SDK, โ€ข Device capabilities - Bluetooth / BLE, Location, Apple maps, Google maps, Push notifications, Network, tunneling, traffic management, HealthKit, โ€ข Working with payments - In-app purchases, Apple Pay, Shopify, Stripe, โ€ข Client-server communication - RESTful API, GraphQL, XML, JSON, Websockets, Sockets, Firebase SDK, AWS, โ€ข AI - MLKit, ChatGPT API I work with many professional tools, but mostly with: โ€ข Xcode & Cocoapods - iOS development tools, โ€ข Android Studio & Gradle - for Android development, โ€ข Visual Studio Code - for Flutter hybrid development โ€ข Git - version control. โ€ข Jira, Redmine, Trello, Slack, Bitbucket, Gitlab - as team tools. I have experience of Firebase back-end development with Javascript. I understand imperative and declarative, OOP principles of programming, a lot of architecture patterns, like MVC, MVVM, MVP etc. I have experience of publishing applications in both Appstore & Google Play. I have experience of team leading and project management.
    Featured Skill Objective-C
    UI Animation
    UI Graphics
    Bluetooth
    Swift
    Kotlin
    Amazon
    Firebase
    watchOS
    API Integration
    Android App Development
    iOS Development
    AI Chatbot
    ChatGPT
    Problem Solving
  • $29 hourly
    For twelve years, I work as an iOS Developer. During this time, I have completed many projects. More than half of my projects are client applications for servers. I understand how such applications are arranged. How to receive the data from a service using a REST API. I know how to parse a service response and display it in an app and create offline mode. I have experience with video and audio. I can combine video files, put sound on them, change this sound, add text or image to the resulting video. I worked with video and audio players and recorders. I worked with Maps. I can display places on this map, present custom callouts on it, and show routes from a user location to these places. I also can work with the CoreData framework. I know how to get data from a database on a thread and display it to a user without an interface freezing. In 2017 I decided to create some apps on my own. My friend is a radiologist, and he shared with me his idea about a medicine app. We have created this app and published it to AppStore. You can find it if you search for RadAnatomy and RadAnatomyLite. 50% of the proceeds I transfer to my friend. During the work on this app I put myself in the place of customers and gain the priceless experience how an idea is embodied to the app. I can use Photoshop and Sketch, and you do not need to slice images. Just provide me a file with a design. The rest I will do by myself. I pay attention to pixel-perfect and custom fonts because I respect designer work.
    Featured Skill Objective-C
    macOS
    Mac OS App Development
    Apple Xcode
    RxSwift
    iOS Development
    iOS
    Firebase
    Swift
  • $23 hourly
    - First of all, I want to insist that I'm a person of work. I'm responsible, enthusiastic, challenges facing, open minded, fast learner and have can-do attitude. - I can quickly understand a given in-progress project and fix existing bugs and issues - I have 4-year experience in Flutter, mobile cross platform developing, using Dart programming language. - I have about 9-year experience in developing app on iOS platform (using Swift. ObjectiveC and SwiftUI) with many big projects in OTT, social network, blockchain, crypto, DeFi, navigation, travel and productivity aspect. - Ability implement and deploy Backend code to Firebase Cloud Function for some critical tasks such as: push notification, process webhook for payment (ex, Stripe),... - I'm strong at making animations, view transition - I have excellent knowledge in core concepts such as Object Oriented Programming (OOP), design patterns, memory management, data structure, MVC architecture. - I'm able to submit apps to Apple store, Google Play. - I'm strong at implementing asynchronous and concurrency. - I'm capable of creating framework, SDK for third-party usage. - I'm good at RESTful api or GraphQL communicating with server. - I also have knowledge about blockchain, crypto and all processes on blockchain.
    Featured Skill Objective-C
    SwiftUI
    iOS Development
    Android
    iOS
    UI Animation
    Swift
    Asynchronous I/O
    Push Notifications
    Flutter
    App Development
    RESTful API
    In-App Purchases
    Dart
    Native App Development
    Git
  • $29 hourly
    Hey! I'm a veteran Mobile App Architect and Developer with a decade-long journey in crafting mobile applications. I'm a technology enthusiast who loves exploring new trends and challenges in the mobile app domain. โ†ณ Fluency in English โ†ณ Available to work any time zone โ†ณ Worked with clients around 16+ countries My mission is to provide exceptional returns on clients' technological investments globally through top-notch iOS and Android apps. Whether you are - a start-up - an individual - a technical expert - a company or digital agency I have the perfect solutions for your project because I deal with new trends and challenges daily basis. I specialize in high-quality Mobile App Development areas.: - iPhone native app development (Swift, SwiftUI, iOS SDK, Xcode) - Cross Platform Mobile App Development using Flutter, Dart, and React. - Expert in Upload apps in Appstore and Playstore - Android app development About me: - 25+ mobile apps developed to store - Best Shining Developer Awarded In during Corporate Company - Clean code: Please once check the code standard. (GitHub: shahsaumil2001) - Around 30+ Short/long Term Jobs Completed Successfully With 5 Star Rating - Apps developed by me, Around 50 million+ downloads on store, and users love to use them regular basis. Achievements: โ†ณ My Client App Was Awarded in IFAH โ†ณ 12+ years of professional experience โ†ณ My Client App ๐“๐จ๐ฉ-๐ซ๐š๐ง๐ค๐ข๐ง๐  ๐Ÿ๐ข๐ญ๐ง๐ž๐ฌ๐ฌ ๐š๐ฉ๐ฉ๐ฌ On App Store โ†ณ My client apps featured in 200+ Magazine and News Papers โ†ณ Top-Rated Plus Contractor (proven badge for large contracts) ๐Ÿ† ๐—ฅ๐—ฒ๐˜ƒ๐—ถ๐—ฒ๐˜„๐˜€ ๐—ฎ๐—ป๐—ฑ ๐—ณ๐—ฒ๐—ฒ๐—ฑ๐—ฏ๐—ฎ๐—ฐ๐—ธ ๐—ณ๐—ฟ๐—ผ๐—บ ๐—ต๐—ถ๐—ด๐—ต-๐—ฝ๐—ฟ๐—ผ๐—ณ๐—ถ๐—น๐—ฒ ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜๐˜€ (๐ฅ๐š๐ซ๐ ๐ž๐ซ ๐œ๐จ๐ง๐ญ๐ซ๐š๐œ๐ญ๐ฌ ๐ญ๐ก๐š๐ง $๐Ÿ‘๐ŸŽ๐Š) ๐Ÿ† โญโญโญโญโญ Iโ€™m very satisfied with Saumilโ€™s work. He was willing to take on any task and did whatever was necessary to complete the project. His excellent communication kept me informed of his progress and when tasks were completed, without needing to be asked. He quickly learned new technologies, successfully working on both iOS and React/NextJS. I would definitely hire him again. - ๐‰๐ž๐ซ๐ž๐ฆ๐ข๐š๐ก ๐ˆ๐ซ๐ข๐ณ๐š๐ซ๐ซ๐ฒ, ๐”๐ง๐ข๐ญ๐ž๐ ๐’๐ญ๐š๐ญ๐ž๐ฌ โญโญโญโญโญ Saumil did an amazing job. He is very collaborative, has valuable inputs and suggestions, and is willing to jump in even when things are not as clearly defined (as often in startup work). Excellent communication and progress updates as he is working.- ๐•๐ข๐œ๐ญ๐จ๐ซ ๐‰๐จ๐ฌ๐ž๐ฉ๐ก, ๐ˆ๐ซ๐ž๐ฅ๐š๐ง๐ ๐Ÿ™‹ ๐…๐ซ๐ž๐ช๐ฎ๐ž๐ง๐ญ๐ฅ๐ฒ ๐š๐ฌ๐ค๐ž๐ ๐ช๐ฎ๐ž๐ฌ๐ญ๐ข๐จ๐ง๐ฌ(๐…๐€๐): Q1: Can you offer maintenance support post-development? A1: Yes, I offer free maintenance support for three months after mobile app development. Q2: Can you help with Mobile app design? A2: As an additional service, I provide mobile app UX design. Q3: Can you help with the landing page website for my mobile app product? A3: Yes, I can help to build the landing page for a mobile app product. Explore my perfect feedback on Upwork for a taste of what I can bring to your project. Letโ€™s create something exceptional together! Please feel free to reach out to discuss how we can bring your vision to life. Kind Regards, Saumil Shah Keywords to find me : -------------------------- Native iOS App Developer, Android App Developer, Cross-Platform Flutter App Developer, Top Flutter Developer, React Native, API Integration, Frontend Developer, React.js, In-app purchases, Location, Payment Gateway Integration, Apple, Xcode, Push notifications, User authentication, User profile creation, SwiftUI, Mapbox, HealthKit, Alamofire, Google Analytics, Mapkit, OpenAI, ChatGPT, swift, Stripe, AppFlyer, Revenuecat. Last updated: 22 Nov 2024.
    Featured Skill Objective-C
    Next.js
    React Native
    Tailwind CSS
    SwiftUI
    User Authentication
    Map Integration
    Mobile App Development
    Location-Based Service
    In-App Purchases
    Swift
    Mobile App
    Flutter
    iOS
    iOS Development
    Native App Development
  • $40 hourly
    Iโ€™m a passionate developer with 7 years of experience. Iโ€™m a full stack developer, but i specialize in the field of mobile systems development. My current work includes machine learning systems on mobile devices and custom navigator applications which include from scratch algorithm development, and I also develop native components for Flutter as well as writing Flutter code. I have an experience of working with small companies as well as governmental clients.
    Featured Skill Objective-C
    Smartphone
    Web Application
    Flutter
    Rust
    React Native
    Firebase Cloud Firestore
    Android
    iOS
    Kotlin
    AWS Lambda
    Swift
    C++
  • $15 hourly
    Hi, I'm Mohamed. I have 10 years experience as iOS developer.I have developed lots of app which are live on the app store. I have worked with sockets(secured) , sip protocol (client and server),RESTful web services and Firebase and JSON Main skills: objective c, CocoaPods, Firebase, PHP, Javascript
    Featured Skill Objective-C
    FreeSWITCH
    GPS
    Session Initiation Protocol
    Mobile App Development
    iOS Development
    Swift
    iOS
    Firebase
  • $25 hourly
    Hello, my name is Max and I'm mobile and back-end developer with ~6 years of experience. I specialize in creating mobile applications for iOS. Also I can create complex back-end solutions for web and software projects. Despite Iโ€™m a programmer, math is my passion, Iโ€™m good at calculus, number theory, linear algebra, combinatorics and probability theory Below you can find a full list of my skills: Swift: Cocoa Touch, OOP, Protocol oriented programming, VIPER, Redux, CocoaPods, Swift Package Manager, Cartridge, SwiftUI, Core Data, FireBase, SwiftPhoenixClient, StarScream, Crashlytics, XCTest, SwiftLint, R.swift Java: Hibernate, REST, Jersey, JDBC, JUnit, DBUnit, Maven, Gradle, (familiar with Spring) Scala: Play/Play2 framawork, ScalaJS, ScalaTest, SBT C++ (MFC, Qt, STD), Assembler, SWI/Visual prolog Data Bases: MySQL, PostgreSQL PHP: MVC, SPL, Opencart CMS HTML/CSS, XML, Bootstrap, JS (JQuery) Let's create something great together!
    Featured Skill Objective-C
    SQL
    Cocoa Touch
    Git
    Mathematics
    HTML5
    Java
    C++
    Swift
    Scala
  • $50 hourly
    - 7+ years developing cross-platform applications using React Native - Java/Kotlin, ObjectiveC/Swift native development and building native modules for RN - Full cycle development, from initial idea to application in stores
    Featured Skill Objective-C
    React
    Java
    React Native
    Firebase
    JavaScript
  • $35 hourly
    I am reaching out to express my interest in the iOS Developer position and to introduce myself as a proficient and dedicated professional in the field. With over a decade of hands-on experience as an iOS developer, I bring a robust skill set and a proven track record of delivering high-quality applications with a strong emphasis on architectural integrity, clean code practices, and meticulous testing procedures. Key highlights of my background include: * Extensive Experience and Adaptability: Over 10 years of dedicated iOS development experience, showcasing adaptability from earlier expertise in RxSwift/MVVMc architecture to the Swift adoption of modern technologies. I have successfully transitioned from traditional approaches to embracing cutting-edge frameworks, including SwiftUI and Combine framework since their inception. In my most recent projects, I have adeptly employed The Composable Architecture, focusing on a reactive and scalable approach to streamline development and enhance app maintainability. * Strategic Technology Implementation: Specializing in strategically incorporating cutting-edge technologies to enhance app performance and user experience. I am well-versed in utilizing technologies such as WebRTC and VoxImplant for video calls, Tinode for messaging, gRPC for efficient remote procedure calls and GraphQL for versatile data querying. * Quality Assurance and Optimization: Proficiency in ensuring code quality through tools like SwiftLint, adherence to Git flow for version control, and utilizing Fastlane for efficient app deployment and automation. I am eager to bring my expertise to your team and contribute to your projects immediately. My commitment to delivering robust, user-centric applications aligns seamlessly with your vision for exceptional development standards. Thank you for considering my application. I am looking forward to the opportunity to collaborate and contribute to your team's success.
    Featured Skill Objective-C
    Reactive Programming
    Machine Learning
    GraphQL
    Blockchain
    In-App Purchases
    NFT
    RxSwift
    Swift
    Realm Database
    WebRTC
    Core ML
    Firebase
    Twilio
    Artificial Intelligence
  • $70 hourly
    I build iOS apps from ideas to $1m+ ARR. ๐Ÿš€ Just tap invite and let's jump on a call to discuss your project I've worked as a senior iOS developer and technical lead for the past 12 years, delivering apps used internally at Harvard University, Tesla, Danfoss, and FIFA World Cup. More recently I've become specialised in LLMs integrations (ChatGPT/OpenAI, Claude/Anthropic, Gemini) having created the PingMi, Loopsie and Rare based on Open AI / Chat GPT with 10+ million users. I'd be happy to look at taking on your mobile projects.
    Featured Skill Objective-C
    Native App Development
    SwiftUI
    User Authentication
    User Profile Creation
    iPad App Development
    Artificial Intelligence
    iOS Development
    Camera
    Mobile App Development
    Swift
    Smartphone
    iOS
  • $15 hourly
    6 year exps+ iOS developer: B2B, B2C project. 1 year in Flutter Familiar with SQL, Oracle SQL Server. Skills: - Intermediate: Swift, Objective - C, SQL - Middle: Flutter - Basic: RxSwift
    Featured Skill Objective-C
    Ionic Framework
    Angular
    Mobile Angular UI
    Android App Development
    Smartphone
    Mobile App Development
    Flutter
    Swift
    iOS
    iOS Development
  • $15 hourly
    The goal is "Empowering people and Business" Expertise to make work successful : โ†’ Highly dedicated to completing projects on time. โ†’ Availability of presence for work. โ†’ Love to accept challenging work. โ†’ Comfort to work on existing projects. Having 8+ years of experience in mobile and web application development My Expertise : โ†’ Experienced in Live Tracking app, Social app, Nearby Service app, Delivery app, Learning app, Calendar app, Task management App, Dating App, etc. โ†’ Strong knowledge of Objective C, Swift, Java โ†’ Familiar with Realm database, RESTful APIs, AWS S3, and Firebase โ†’ Realtime Chat with story-like Whatsapp โ†’ Auto layout to build apps across all different size devices โ†’ Map Integration, Payment Gateway, Push Notification, In-App Purchase, IAd Implementation, Multi language Support โ†’ Git-SVN-BitBucket committing and Task management with Trello and Jeera โ†’ ASP.Net MVC, WPF (Windows Presentation Foundation), HTML, Javascript, Jquery, React.JS, Bootstrap, CSS, Kibo eCommerce, Backbone js I ensure to provide best service with latest technology to every client and make their application successful on App Store. Thanks again for visiting my profile! Have a great day!
    Featured Skill Objective-C
    iPad App Development
    iPhone UI Design
    iPad UI Design
    Android SDK
    iOS SDK
    Android App Development
    iOS Development
    iOS
    Amazon Web Services
    iPadOS
    Tablet
    Swift
    Android
  • $32 hourly
    Hi, I'm a Team Lead of iOS development at NIX with solid experience in commercial projects. We are always focused on business idea of the product, as well as on software quality and its timely delivery. These are our core pillars for the successful partnership and comfortable development process that we practice in any project. Depending on your business needs and project features, we can offer you an optimum set of frameworks and technologies: โ€ข Programming Languages: Swift, Objective C โ€ข Frameworks/libraries: Storyboard, Autolayout, CoreImage, CoreAnimation, CoreLocation, Multithreading, APNS, In-App Purchase, ApplePay, CallKit, PushKit, ARKit, CoreML, Vision, WebAR, SceneKit, SpriteKit, Metal, WatchKit, HealthKit, TextKit, MapKit, SiriKit, AVFoundation, Speech, AddressBook, Swinject, PromiseKit, AFNetworking, RestKit, Alamofire/Moya, Unit testing (XCTest, GHUnit, OCMock), Ffmpeg; โ€ข DBMS: CoreData, Realm, SQLite, fmdb; โ€ข VCS: Git, SVN; โ€ข CI/CD: Jenkins, Teamcity, Bitrise, Fastlane, Gitlab CI; โ€ข Code Review: Fish Eye, Gitlab, Reviewable; โ€ข Other: integrations - CocoaPods, Social networks, WeChat, Payment / Clouds API, Google Maps, Firebase, Google Analytics, Fabric, deepLinks, AppsFlyer, Google Cloud Messaging, WebRTC libraries, Matrix, Bolts, Localytics, Branch.io; โ€ข IDE: XCode, Appcode Some of the recent projects that I successfully accomplished were related to AR/VR apps, IoT apps, e-readers, news applications, social networks, Audio/Video/Image processing, e-commerce. Iโ€™m always up to new opportunities and strive to provide my expertise in effective and cutting-edge technologies to meet your business needs. So if you are looking for a responsible iOS developer(s), and need a right solution that meets both budget and duration expectations, please contact me.
    Featured Skill Objective-C
    Application Optimization
    App Store Upload
    App Store
    CI/CD
    iPad App Development
    Mobile App Development
    iOS Development
    Unity
    Swift
  • $45 hourly
    ๐Ÿ‘‹ I'm a ๐—ง๐—ผ๐—ฝ ๐—ฅ๐—ฎ๐˜๐—ฒ๐—ฑ ๐— ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ฒ๐—ฟ with a serious track record - more than ๐Ÿญ๐Ÿฏ ๐˜†๐—ฒ๐—ฎ๐—ฟ๐˜€ in the game and ๐—ผ๐˜ƒ๐—ฒ๐—ฟ ๐Ÿฑ๐Ÿฌ ๐—บ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ ๐—ฎ๐—ฝ๐—ฝ๐˜€ under my belt. I've got chops in both ๐—ถ๐—ข๐—ฆ and ๐—”๐—ป๐—ฑ๐—ฟ๐—ผ๐—ถ๐—ฑ platforms, and I'm all about making killer apps from the ground up. Whether it's ๐—ป๐—ฎ๐˜๐—ถ๐˜ƒ๐—ฒ ๐—บ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ ๐—ฑ๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ (like ๐—ฆ๐˜„๐—ถ๐—ณ๐˜๐—จ๐—œ, ๐—ฆ๐˜„๐—ถ๐—ณ๐˜, ๐—ข๐—ฏ๐—ท๐—ฒ๐—ฐ๐˜๐—ถ๐˜ƒ๐—ฒ-๐—–) or ๐—ต๐˜†๐—ฏ๐—ฟ๐—ถ๐—ฑ ๐—ฎ๐—ฝ๐—ฝ ๐—ฑ๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ (think ๐—™๐—น๐˜‚๐˜๐˜๐—ฒ๐—ฟ), I've got you covered. This is ๐˜„๐—ต๐—ฎ๐˜ ๐˜€๐—ฒ๐˜๐˜€ ๐—บ๐—ฒ ๐—ฎ๐—ฝ๐—ฎ๐—ฟ๐˜ ๐—ณ๐—ฟ๐—ผ๐—บ ๐—ฒ๐˜ƒ๐—ฒ๐—ฟ๐˜†๐—ฏ๐—ผ๐—ฑ๐˜† ๐—ฒ๐—น๐˜€๐—ฒ you could hire to help you with development: 1๏ธโƒฃ I love creating mobile experiences that aren't just functional, but also really connect with users. I'm talking about ๐—ฒ๐˜†๐—ฒ-๐—ฐ๐—ฎ๐˜๐—ฐ๐—ต๐—ถ๐—ป๐—ด ๐—จ๐—œ/๐—จ๐—ซ ๐—ฑ๐—ฒ๐˜€๐—ถ๐—ด๐—ป and sturdy, ๐˜€๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ฒ ๐—ฏ๐—ฎ๐—ฐ๐—ธ-๐—ฒ๐—ป๐—ฑ ๐—ฎ๐—ฟ๐—ฐ๐—ต๐—ถ๐˜๐—ฒ๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ to keep everything running smoothly. 2๏ธโƒฃ And that's not all! I'm also an expert when it comes to integrating mobile apps with all kinds of ๐—”๐—ฃ๐—œ๐˜€, ๐—ฑ๐—ฎ๐˜๐—ฎ๐—ฏ๐—ฎ๐˜€๐—ฒ๐˜€, ๐—ฎ๐—ป๐—ฑ ๐—ฐ๐—น๐—ผ๐˜‚๐—ฑ ๐˜€๐—ฒ๐—ฟ๐˜ƒ๐—ถ๐—ฐ๐—ฒ๐˜€, so the user experience is seamless. Plus, I'm always on the ball when it comes to ๐—ฑ๐—ฒ๐—ฏ๐˜‚๐—ด๐—ด๐—ถ๐—ป๐—ด, ๐—ผ๐—ฝ๐˜๐—ถ๐—บ๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป, ๐—ฎ๐—ป๐—ฑ ๐—บ๐—ฎ๐—ถ๐—ป๐˜๐—ฒ๐—ป๐—ฎ๐—ป๐—ฐ๐—ฒ, so the apps I build stay in tip-top shape. 3๏ธโƒฃ Bottom line: I'm not just here to meet expectations โ€“ I'm here to blow them away. If you're looking for ๐—ต๐—ถ๐—ด๐—ต-๐—พ๐˜‚๐—ฎ๐—น๐—ถ๐˜๐˜†, ๐—ฐ๐˜‚๐˜€๐˜๐—ผ๐—บ ๐—บ๐—ผ๐—ฏ๐—ถ๐—น๐—ฒ ๐˜€๐—ผ๐—น๐˜‚๐˜๐—ถ๐—ผ๐—ป๐˜€ that'll help your business grow and keep your customers happy, then let's connect! Big thank you for learning about me! ๐—•๐—ผ๐—ผ๐—ธ ๐—ฎ ๐—ฝ๐—ฎ๐—ถ๐—ฑ ๐—ฐ๐—ผ๐—ป๐˜€๐˜‚๐—น๐˜๐—ฎ๐˜๐—ถ๐—ผ๐—ป if you want specific advice. Invite me to your project or send me a direct message if you want to have a no-cost exploratory conversation about working together.
    Featured Skill Objective-C
    Full-Stack Development
    AI App Development
    Transportation & Warehousing
    Real Estate
    Flutter
    SwiftUI
    n8n
    Sports & Fitness
    Health & Fitness
    iOS SDK
    Mobile App Development
    iOS Development
    tvOS
    Swift
  • $45 hourly
    I'm an individual developer (not an agency member). I have good experience in React Native (~8 years). Also, I have experience in writing 3rd party components in Java & Obj-C. Took part in a lot of RN projects, so I'm skilled in different areas, below are the main of them. Have experience with: - Redux (thunk, redux-toolkit, sagas) - firebase services - fastlane - TypeScript - calendars - maps (mapbox & react-native-maps) - app optimization (performance) - codePush - Crashlytics - Reanimated 2 - bitrise - mixpanel - logRocket - Microsoft App Center - developing separate third-party components for RN projects - graphQL with Apollo Client Feel free to contact me with any questions.
    Featured Skill Objective-C
    Redux
    Apollo.io
    Fastlane
    Mobile App Development
    iOS Development
    TypeScript
    Camera
    API Integration
    GraphQL
    Android
    Java
    React Native
    Firebase
  • $20 hourly
    Over the last 10 years i started been doing software development for different multi-nationals like Elixir, Bantlay etc. And then moved towards full-time freelancing for the last 7 years now, i have doing freelancing on different forums like odesk, Elance both of which are now Upwork and have my full ratings and projects summary on this profile. In total i have more than 50 ratings of doing different projects of web development, desktop applications development and mainly Mobile Application development. The main fields i have worked in and have related ratings are: Web development: I have been doing website development full responsive with front-end and back-end both involved, Web application with third part libraries integrated and also intefacing mobile apps with them. I have been using technologies like Php, Mysql and now mainly Javascript platforms such as Node.Js and Angular.js Mobile development: has always been my major skill set and the filed i got the most and main expeience in. I started with Native application development for Android and IOS using Eclipse and Objective-C then moved to Studio and Swift and now Kotlin for Android. I also do cross-platform application development using the tools like React Native, Flutter and Titanium appcelerator.
    Featured Skill Objective-C
    HTML
    .NET Framework
    Appcelerator Titanium
    C#
    Firebase
    React Native
    Swift
    JavaScript
    C++
    Java
    Kotlin
    Android App Development
    MySQL
  • $40 hourly
    Are you looking for a rockstar developer? Look no further. If you value top quality, clean code, and efficient workflow, you just found the right guy! Our collaboration will be based on excellent communication, great attention to detail, solid development experience, and an excessive dedication to bringing more value to your product! Services: - React Native / React.js / Redux; - Flutter, FlutterFlow, Dart; - Native iOS mobile development (iPhone / iPad) using XCode and Swift/Objective-C; - Native Android mobile development using Android Studio/Eclipse and Java; - PHP-based websites (Laravel framework), Javascript, HTML5, CSS3, AJAX; - RESTful APIs implementation, integration with social media APIs (Facebook, Twitter, YouTube); - Databases (MySQL, PostgreSQL, SQLite); - Source code versioning (Git - GitHub/BitBucket, SVN); - Porting from iOS to Android and the other way around.
    Featured Skill Objective-C
    Web Services Development
    iPad App Development
    Android SDK
    Laravel
    iOS
    JavaScript
    React Native
    Java
    Android
    React
    PHP
    iOS Development
    Android App Development
  • $10 hourly
    Hello, In the past 8 years, I gained vast experience in mobile application development (Android and ios) with my past works and jobs on the Upwork. "Client satisfaction" is my main motto of mine. If you're the person who is looking for a developer for long-term project engagement and a developer to take care of the whole of your application development needs, I'll be that person for you. I'll be more than willing to provide references from my other clients. If you are expecting such things like "High Quality", "Clean Code", or "In-Time Delivery" I would be the right person. Hire me immediately. I never compromise with the quality of delivery. Why you should hire me? ** Completed and deployed 250+ apps ** ** 5000+ Upwork hours ** ** Available more than 14 hours in a day for your queries ** ** Upwork Top Rated ** ** Always delivery on time ** ** 100% job Success ** ** 100% Client satisfaction guaranteed ** What service do we provide? 1. Native Mobile application development (Java, Kotlin, Flutter, Objective-C, Swift, React Native, Ionic) 2. Website Development (PHP, Laravel, Code Igniter, WordPress, Node JS, Angular JS, React JS, HTML, CSS, Javascript, My SQL, Rx JS) 3. Firebase Webservice and AWS services 3. UI/UX Design (Photoshop, Adobe illustrator. Figma) 4. Desktop application (Electron JS) 5. Product Testing 6. Maintainance and support My skills and experiences are following ( Android(Java) And iPhone/ios):- 1) Social Networking ( Facebook, Twitter, Instagram, and others) 2) Integration with Web Service(XML, JSON ) 3) Database Management(SQLite,CoreData ) 4) Google Map, GPS Location, Place API, Direction API, Mapkit, Mapbox, 5) Push notification(FCM, APNS, Parse, One signal, Smarttech) 6) Firebase, Amazon Web services, Stripe, Braintree and In-app Purchase Integration, Google Subscription, Apple Pay Subscription 7) Advertisement( iAd, AdMob, RevMob, chart boost, Flurry, Startapp, Facebook Ads ) 8) Bar-code/QR Code scanner apps 9) Health, Fitness, Sports, Ecommece, Business, Chatting, Social, Dating, Custom Applications -Regards Kishan
    Featured Skill Objective-C
    iPad App Development
    WordPress
    Android UI Design
    Laravel
    Mobile App Development
    Android App Development
    iOS Development
    PHP
    iOS
    Kotlin
    Swift
    Android
  • $35 hourly
    Hello, I develop UI and UX friendly, native mobile apps. Along with developing and delivering modern apps I develop web apis which are secure and fast. I write clean, well versed and well documented code by following best practices and guidelines.
    Featured Skill Objective-C
    CodeIgniter
    Next.js
    NodeJS Framework
    Mac OS App Development
    macOS
    Mobile App Development
    React
    iOS Development
    Android
    TypeScript
    React Native
    Swift
    PHP
    JavaScript
  • $72 hourly
    I am a UK-based app developer and professional software engineer with extensive experience building Mobile, Web and Enterprise level applications. I have been practising my craft professionally for over twenty-five years and I have been building mobile apps for iOS since 2011. Expertise: โœ… iOS - iPadOS - tvOS - watchOS - macOS - Swift - SwiftUI - Objective C - UIKit โœ… AppStore Connect - RevenueCat - Git - Jira โœ… SQL - Oracle - MySQL - SQLite - Unix - REST โœ… Java - Hibernate - SOAP - Redhat โœ… WordPress - HTML - CSS - JavaScript - TypeScript - PHP โœ… DNS - Hosting Good software engineering is not just about the technical skills, it is also about great communication, a focus on delivery, excellent problem solving and a desire to learn. My Background: I have a degree in Computing from Napier University, Edinburgh, and have previously worked across a range of software engineering roles in Defence, Government, Health and Finance. I am a TOGAF certified enterprise architect and I have professional certifications in Java Programming and Oracle Database Administration. But don't let all that bamboozle you, I'm a down-to-earth developer with excellent communication skills, who will work with you to build exactly what you need. I am also a Top Rated freelancer here on Upwork and have a vast amount of experience that I can bring to your project, no matter how big or small. I love building applications and digital products from the ground up, and I love using my skills to help solve digital problems. If I were to summarise โ€” I'd say, I love making things work. I also love talking tech โ€” so whether it's working out the best way to do something, updating an existing app, or building something from the ground up โ€” drop me a message, it is free to talk it over.
    Featured Skill Objective-C
    Git
    UIKit
    tvOS
    watchOS
    macOS
    Apple Watch
    Apple TV Application
    Desktop Application
    iPad
    iPhone
    Mobile App Development
    iOS Development
    iOS
    Swift
  • $60 hourly
    I've been working as an iOS Developer for 14 years. Experienced in both Swift and Objective-C, I have developed apps for the iPhone, iPad, Apple Watch and Apple TV. I've worked on Android too, both Java and Kotlin. I have submitted many apps to the App Store, with complex interfaces, extensive web service communication, and multimedia content. Some of these apps got good references in the press, and one of them, Back in Time, was selected by The New York Times as one of the Top 10 iPad apps of the year.
    Featured Skill Objective-C
    iOS Development
    Mobile App Development
    Swift
  • $55 hourly
    I've been working with iOS for more than 8 years, and previously worked another year on JAVA, developing part of the backend for an e-comerce site, something ebay like (mercadolibre.com). During the years I'd work on iOS, I have developed different kind of applications, from promotional to educational apps. I also have experience creating iWatch apps and Widgets for iOS. (As you can see on Help 911 app, listed below) I like to be challenged on difficult (or not so common) tasks, creating and implementing different kind of data structures in order to improve app's performance. As an example of my work, you can check Nearpod or Picpic Social, apps which are constantly communicating with a server in order to synchronize between different devices. Picpic and Pixity are apps which high social media interaction, sharing photos, animated GIFs and videos on Facebook, Twitter, MMS, Email and Instagram (Also listed below) I like to take the complicated tasks. I have experience on many developing areas, from UI to server connection, including team leadership but, as I said, what I enjoy the most are the challenges, I like to take the hard parts of the project and make them work. I also have experience using both SVN and GIT. I've taken some UpWork tests on iOS, but I prefer to reference my portfolio instead. I think that's more related to the real day to day work. Here are some of the apps I'd work on, please search them on the Apple Store since Up work doesn't allow to add links on the description. PicPic Social (iPad Only), Pixity Booth (iPad Only), GotEventz, Police Connect, Fix 311, Help 911, CardSwapp, ContactMe, Nearpod
    Featured Skill Objective-C
    Castilian Spanish
    Machine Learning
    Apple Xcode
    iOS Development
    Swift
    C
    Java
  • $40 hourly
    Results-oriented Flutter Developer/ iOS developer with over eight years of experience. My vision for an application is developed keeping the user in mind, resulting in usable and intuitive user interface applications. I also understand the importance of creating highly readable and easily maintainable source code. Communication is key to the way that I develop software. Specializing in Mobile application testing, AWS, Firebase Database, MYSQL Database, API/REST, UI Testing, Product Requirements & more. I am a U.S. citizen, eligible to work in roles restricted to U.S. candidates and bring a proven track record of communication and collaboration with stakeholders to drive projects forward. Iโ€™m ready to contribute to your teamโ€™s success and help launch innovative products.
    Featured Skill Objective-C
    iOS Development
    Chat & Messaging Software
    Map Integration
    Push Notifications
    Swift
  • $50 hourly
    I bring 20 years of experience in Web and Mobile Application Development, with strong expertise in Java, Node.js, iOS, Android, and Appcelerator Titanium. I specialize in building robust, scalable, and high-performance applications across multiple platforms. โœ… Top Rated Developer โœ… Over 2,800 Hours Logged on Upwork โœ… 100% Job Success Score โœ… Excellent Client Feedback โœ… High Performer on Upwork Skill Tests Expertise in Programming Languages, Tools, and Technologies: - Appcelerator Titanium โ€“ 12+ years of experience - Android Development โ€“ 10+ years - Xcode / Objective-C โ€“ 10+ years - Swift โ€“ 7+ years - Flutter โ€“ 3 years - Node.js โ€“ 8+ years - Java โ€“ 18+ years - Spring Framework โ€“ 17+ years - Hibernate โ€“ 17+ years - MySQL โ€“ 17+ years (Advanced proficiency) - MongoDB โ€“ 5+ years (Basic knowledge) - JasperReports โ€“ 12+ years - Amazon Web Services (AWS) โ€“ 4+ years
    Featured Skill Objective-C
    Vue.js
    iOS Development
    Android App Development
    Android
    In-App Purchases
    JavaScript
    Swift
    iOS
    Smartphone
    Appcelerator Titanium
    Java
    Node.js
  • Want to browse more freelancers?
    Sign up

How it works

1. Post a job

Tell us what you need. Provide as many details as possible, but donโ€™t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates youโ€™re excited about. Hire as soon as youโ€™re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

How to Hire Top Objective-C Developers

How to hire Objective-C developers

Objective-C developers can help you build apps for iOS, macOS, and other Apple products. Since Apple encourages developers to eventually switch to Objective-Cโ€™s successor, Swift, Objective-C specialists are mostly sought after for updating and maintaining legacy code.

So how do you hire Objective-C developers? What follows are some tips for finding top Objective-C consultants on Upwork.

How to shortlist Objective-C professionals

As youโ€™re browsing available Objective-C consultants, it can be helpful to develop a shortlist of the professionals you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want an Objective-C developer who understands the technologies behind your software project.
  • Project experience. Screen candidate profiles for specific skills and experience (e.g., migrating a legacy Objective-C codebase to Swift).
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what itโ€™s like to work with a particular Objective-C developer.

How to write an effective Objective-C job post

With a clear picture of your ideal Objective-C developer in mind, itโ€™s time to write that job post. Although you donโ€™t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if theyโ€™re the right fit for the project.

Job post title

Create a simple title that describes exactly what youโ€™re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample Objective-C job post titles:

  • Objective-C developer needed to refactor legacy code to Swift
  • iOS developer experienced with Swift, Xcode, and Objective-C
  • Swift/Objective-C developer for maintaining/updating a news curation platform

Objective-C project description

An effective Objective-C job post should include:

  • Scope of work: From app development to code migrations, list all the deliverables youโ€™ll need.
  • Project length: Your job post should indicate whether this is a smaller or larger project.
  • Background: If you prefer experience with certain programming languages, software technologies, or developer tools, mention this here.
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Objective-C developer responsibilities

Here are some examples of Objective-C developer job responsibilities:

  • Innovate and present new ideas/solutions
  • Translate customer requirements and UI/UX designs into code
  • Handle third-party API integrations
  • Migrate legacy Objective-C code into Swift

Objective-C developer requirements and qualifications

Be sure to include any requirements and qualifications youโ€™re looking for in an Objective-C developer. Some examples:

  • Proficient in Objective-C (and Swift depending on project requirements)
  • Apple development environments (e.g., Xcode, Cocoa, Cocoa Touch)
  • iOS frameworks (e.g., Core Data, Core Animation)
  • Desired Apple operating systems (e.g., macOS, iOS)
  • Desired Apple hardware (e.g., MacBook, Apple Watch, iPhone)

Objective-C Developers FAQ

What is Objective-C?

Objective-C is a general-purpose programming language that supports object-oriented design by adding Smalltalk-style messaging to the C programming language. It was the main supported programming language for Apple products (e.g., macOS, iOS) until the introduction of Swift in 2014.

How much does it cost to hire an Objective-C developer?

The first step to determining the cost to hire an Objective-C developer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all Objective-C projects are created equal. Building a simple store loyalty app will typically take less time than creating an online store with in-app purchases.

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: Objective-C developer experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldnโ€™t need an advanced Objective-C developer to perform simple maintenance tasks such as patching your software to keep up with the latest iOS app update. On the other hand, migrating a large codebase for an enterprise app from Objective-C to Swift can be a long multistage process that requires the skills of a senior developer.

Beyond experience level, you also need to consider the type of experience the talent possesses. The following table breaks down the rates of the typical types of Objective-C developers you can find on Upwork.

Rates charged by Objective-C developers on Upwork

Level of Experience Description Hourly Rate
Beginner Can build simple applications with Objective-C and Swift for iOS and/or macOS. Familiarity with Cocoa, Cocoa Touch, and/or Xcode. $20-30+
Intermediate Beyond fundamentals, specialized skills in developing for one or more Apple devices such as iPhone, iPad, Mac, Apple TV, and Apple Watch. $30-60+
Expert Experience managing a productโ€™s progression through the software development life cycle. Working knowledge across the front end and back end of a software stack. $60-90+

Cost factor #3: location

Location is another variable that can impact Objective-C developer rates. Itโ€™s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But itโ€™s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle.

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a โ€œone size fits allโ€ model, so youโ€™ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but youโ€™ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Common Objective-C developer mistakes

Not using prefixes: Classes, global functions, global constants, and protocols should be named with a prefix starting with a capital letter followed by one or more capital letters or numbers. Itโ€™s a cosmetic quirk owed to the lack of identifier containers within the Objective-C language.

To avoid namespace collisions, Objective-C relies heavily on prefixes. This is why many global elements start with NS (e.g., NSString, NSObject). For example, within the Cocoa framework, you use the NS prefix for Foundation and Application Kit, AB for Address Book, and IB for Interface Builder. Note that you do not use prefixes for naming methods or the fields of a structure.

Not practicing type safety: One of the major reasons Apple wants its developers to switch to Swift is that the language enforces type safety. Type errors are a common problem with Objective-C codebases because you have to use null pointers to implement type safety. When you try to call a method with a null pointer nothing happens. The following expressions and lines of code become a no-operation (NOP). At first glance, this might seem fine because your app wonโ€™t crash. However, if youโ€™re not careful with how you implement your pointers, you could cause hidden bugs within your code that are hard to trace.

Accepting unknown strings as format strings: One common source of errors, crashes, and security problems is blindly accepting unknown strings as format strings. A good example is when you log a simple string with NSLog. If you neglect to use the format specifier %@, you might receive a string with characters that are interpreted as format strings.

//UnsafeNSLog(foreignString);

//Using a format specifier

NSLog(@"%@", foreignString);

Tips and best practices

Follow Objective-C naming conventions

As a rule youโ€™ll want to make sure that any code you write will make sense to future developers working off your codebase. The best way to do that is to ensure you follow standard naming conventions for classes, methods, functions, constants, and other elements of your code. You can find naming conventions for a language like Objective-C off Appleโ€™s official documentation.

Take advantage of C++ interoperability

Swift may be Appleโ€™s preferred application development language, but there are still some advantages to using the more forgiving Objective-C. One of these is interoperability with C++ code via Objective-C++. C++ is basically C with classesโ€”itโ€™s lightweight and one of the fastest languages out there. The ability to leverage the C++ ecosystem of libraries is enough of a reason for some to keep using Objective-C with modern iOS and macOS apps.

Leverage Objective-Cโ€™s massive library

Objective-C has been around a lot longer than Swift. Initially released in 1984, it offers countless libraries to help developers with their projects. GitHubโ€™s libraries address everything from real-time app analytics to mock objects for test cases to method swizzling. There are also macros, fragments of code that have been around for so long theyโ€™ve been named by the larger developer community, that can be used to solve specific problems you might encounter when building Apple apps. Examples of macros include DLog for logging and debugging and Nimble for creating DSLs (domain-specific languages).

View less
A talent edge for your entire organization
Enterprise Suite has you covered for hiring, managing, and scaling talent more strategically.
Schedule a call