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Objective-C

  • Mobile Development
    What Is EXC_BAD_ACCESS and How to Debug ItDebugging@2x
    145 shares
    At one point or another, you will run into a crash caused by EXC_BAD_ACCESS. In this quick tip, you will learn what EXC_BAD_ACCESS is and what it is caused by. I will also give you a few tips to fix bugs that are caused by EXC_BAD_ACCESS.Read More…
  • Mobile Development
    Design Patterns: DelegationPreview image@2x
    130 shares
    The delegation pattern is among the most common patterns in iOS and OS X development. It is a simple pattern that is heavily used by Apple's frameworks and even the simplest iOS application leverages delegation to do its work. In this article, we'll explore delegation and you'll learn how to implement it using Swift and Objective-C.Read More…
  • Mobile Development
    Creating a Dating Application with Sinch: Integrating SinchPreview image@2x
    141 shares
    In this tutorial, we're going to create a dating application for iOS similar to Tinder. For voice and messaging, we will leverage the Sinch platform, making use of its powerful SDK. In the first part, we focused on the development of a RESTful API to store and retrieve user information. In this part, the iOS client will hook into this API to find nearby users based on the user's current location.Read More…
  • Mobile Development
    Design Patterns: SingletonsPreview image@2x
    145 shares
    Design patterns are often considered a more advanced topic and therefore ignored or overlooked by people new to iOS or OS X development. However, there are a number of design patterns every aspiring iOS or OS X developer will be faced with from day one. The singleton pattern is one such pattern. In this article, we'll take a close look at the singleton pattern by discussing its advantages and disadvantages. You'll also learn how to implement the singleton pattern in Swift and Objective-C.Read More…
  • Mobile Development
    Design Patterns: Dependency InjectionPreview image@2x
    183 shares
    Even though dependency injection is a topic that is rarely taught to beginners, it is a design pattern that deserves more attention. Many developers avoid dependency injection, because they don't know what it means or because they think that they don't need it. In this article, I'm going to try to convince you of the value of dependency injection. To do this, I will introduce you to dependency injection by showing you how simple it is in its simplest form.Read More…
  • iOS SDK
    Localizing an iOS Application in Xcode 6Preview image@2x
    116 shares
    The iOS App Store supports over 150 different countries. To reach this global market, you have to understand how to translate your app into different languages. This tutorial introduces the basics of internationalization and localization in Xcode 6.Read More…
  • Swift
    Swift from Scratch: Initialization and Initializer DelegationPreview image@2x
    135 shares
    In the previous installments of Swift from Scratch, we created a functional to-do application. The data model could use some love though. In this tutorial, we're going to refactor the data model by implementing a custom model class.Read More…
  • Swift
    Swift from Scratch: Access Control and Property ObserversPreview image@2x
    115 shares
    In the previous tutorial, we added the ability to create to-do items. While this addition has made the application a bit more useful, it would also be convenient to add the ability to mark items as done and delete items. That's what we'll focus on in this tutorial.Read More…
  • Swift
    Swift from Scratch: Delegation and PropertiesPreview image@2x
    126 shares
    In the previous tutorial, you created your first Swift project in Xcode, a simple to-do application. In this installment of Swift from Scratch, we're going to add the ability to create to-do items. Along the way, you will learn about actions, delegation, and properties.Read More…
  • Swift
    Swift from Scratch: Inheritance and ProtocolsPreview image@2x
    148 shares
    While playgrounds are a great tool to play with Swift and learn the language, it's time to move on and create our first Swift project in Xcode. In this article, we're going to create the foundation of a simple to-do application using Xcode and Swift. Along the way, we'll learn more about object-oriented programming and we'll also take a closer look at the integration between Swift and Objective-C.Read More…
  • Swift
    Quick Tip: Enumerations in SwiftPreview image@2x
    122 shares
    Enumerations are a common design pattern in many programming languages. While you may be familiar with enumerations in C and Objective-C, Swift's implementation of enumerations is significantly more powerful and flexible. In this quick tip, you'll learn what's special about enumerations in Swift, how to use them in your projects, and what makes them so powerful.Read More…
  • Swift
    Swift from Scratch: An Introduction to Classes and StructuresPreview image@2x
    147 shares
    In the previous articles of this series, we covered the basics of the Swift programming language. If you followed along, you should now have a solid understanding of variables, constants, functions, and closures. It's now time to use what we've learned so far and apply that knowledge to the object-oriented concepts of Swift.Read More…
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