Mobile App Development

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Android Game Development Help

Developing an Android game is a complex process, but there's plenty of experience to guide you. Online and personal resources can make the process a journey of discovery, not dead ends: [more…]

Building iOS 6 Apps Using Delegates with Views and Other Classes

The following table includes delegates used in iOS application development. Exceptions to when you need to use a delegate are shown in the Special Use column. [more…]

Using Objective-C Operators in iOS 6 App Development

Objective-C has many helpful operators for your iOS programming. Use the following table to jog your memory about which operator you should use to accomplish a certain task. [more…]

When to Use Subclassing in iOS 6 App Development

Subclassing allows you to customize behaviors while you're developing your iOS application. Keep the following points about subclassing in mind as you develop your app: [more…]

Knowing the Target-Action Patterns for iOS 6 App Development

Following are the Target-Action patterns that you use when programming iOS applications. Specify the target as the view controller (which you'll have already subclassed). [more…]

Android Application Development For Dummies All-in-One Cheat Sheet

Android is an open source, Linux- and Java-based, software framework for mobile and portable devices. The Android operating system now powers nearly half of all smartphones in the world today. Android [more…]

Add a Modal View to your iOS App

Modal views on the iPhone and iPad are great for those situations when you want the user (or the user wants) to do something outside the application flow. Rather than use a Navigation controller with a [more…]

Implementing a Table View in Your iOS App

The functionality in the DestinationController is in the Table view. You’ve probably worked with Table views before — but those used static cells. Now it’s time to branch out on your own and understand [more…]

Understanding iOS Animation

Fortunately, most of what you need to do as far as iOS animation is concerned is already built into the framework. Some view properties can be animated [more…]

Animating a View on Your iOS App

Whenever you assign a new value to certain view properties (such as the frame and center properties), the view is immediately redrawn and the change is immediately visible on the screen. [more…]

Understanding Geocoding on the iPad

Converting an address to a set of map coordinates is called forward geocoding, while converting from a set of coordinates to an address is called reverse geocoding. [more…]

iOS App Development: Understand State Transitions

The UIApplication object provides the application-wide control and coordination for an iOS application. It is responsible for handling the initial routing of incoming user events [more…]

Ten Ways to Be a Happy Developer

In iOS app development, those little things you knew you were supposed to do, but didn't, will catch up with you early and often, so learn to pay attention to from the very start in app development. Here [more…]

Working with Audio in iOS Apps

Specifically there are two different ways iOS has for implementing audio. One is an instance of the AVAudioPlayer class—called, appropriately enough, an [more…]

How to Download the Reachability Sample

Apple provides a sample application called Reachability that shows how to determine whether you have an Internet connection for your iOS app (as well as quite a bit of additional network information). [more…]

How to Download the Reachability Sample with ARC Code

Apple's Reachability sample application for iOS apps has been recently updated to use ARC. Here is how you use both ARC and non-ARC files in your project. [more…]

Working in the Debug Area and Debug Navigator

When you create apps for iOS 6 using Xcode 4, Apple has made it easier to write code with fewer bugs, as well as use the debugger to track down bugs you do have. [more…]

How to Reduce Bugs with Xcode 4

Although some iOS developers think that writing code is where they spend the vast majority of their time when they're developing an app, debugging is actually right up there as a very close second. [more…]

How to Manage Breakpoints in Xcode4

You can use Xcode4's debugger to pause execution of your iOS program at any time and view the state of the running code. This helps you produce more bug-free code for your app. [more…]

What You’ll Find in the Debug Navigator

Each application within iOS is made up of one or more threads, each of which represents a single path of execution through the application's code. Every application starts with a single thread, which runs [more…]

Debug Bar in iOS6 App Development

When you build and run your apps for iOS6 with breakpoints in Xcode, the Debug bar appears in the Workspace window as the program runs in the Simulator. The program stops executing at the first breakpoint [more…]

Navigate in the Xcode Source Editors

When you create apps for iOS6, you need to understand the Xcode Workspace, including Assistant as well. This article will help you extend that knowledge and describe common tasks you need to be able to [more…]

How to Use the Jump Bar in Xcode4

Here's how to navigate the files in your iOS6 application project using the Jump bar and the navigators, as well as how to work with the source editor to enter code. And for when you are confused, or simply [more…]

How to Get Started with Xcode Source Editor

The main tool you use to write code for an iPad application is the Xcode source editor, which appears as the Standard editor pane in the editor area on the right side of the Xcode Workspace window after [more…]

Using Live Issues and Fix-it

The Apple LLVM compiler engine wants to be your best friend, so Live Issues continuously evaluates your code in the background and alerts you to coding mistakes. Before this feature came along, you had [more…]

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