iOS 6 Programming Cookbook
Format: PDF / Kindle (mobi) / ePub
Overcome the vexing issues you’ll inevitably confront when creating apps for the iPhone, iPad, or iPod touch. By making use of new and revised recipes in this updated cookbook, you’ll quickly learn the steps necessary to write complete iOS apps—including ways to store and protect data, enhance and animate graphics, manage files and folders, and take advantage of Passbook.
Thoroughly updated for iOS 6 SDK, this cookbook shows you how to use hundreds of techniques to solve problems that developers of all levels commonly face. Each recipe includes sample code you can use right away.
- Use Pass Kit to deliver digitally-signed passes such as loyalty cards
- Define the layout of UI elements with Cocoa Auto Layout
- Develop location-aware apps
- Get working examples for implementing gesture recognizers
- Use new Objective-C Runtime features
- Play audio and video files and access the iPod library
- Retrieve contacts and groups from the Address Book
- Determine camera availability and access the Photo Library
- Create multitasking-aware apps
- Use Event Kit to manage calendars, dates, and events
- Apply the accelerometer and gyroscope
- Enhance your app with the iCloud service
others so that they can test your app or have a look at it before you submit your app to the App Store. Solution You need to archive your application. Discussion In order to archive an application, you need to follow certain steps: 1. Make sure that you have fully tested the app on the simulator and you are happy that your app is stable. 1.6 Packaging iOS Apps for Distribution | 15 2. Gather the UDIDs (Unique Device Identifiers) of all those devices on which you want to run your app. You can
button. 3. In the next screen, make sure the Subclass of text box says NSObject. Now press the Next button (Figure 1-24). 1.12 Creating Custom Classes | 35 Figure 1-23. The Add File dialog in Xcode 4. In the next screen, as shown in Figure 1-25, make sure that the Save As text box says Person, which is what we’ll name our class. On the bottom of this dialog, make sure that you are saving your class in the correct group/folder. Now two files will get added to your project. One is called
552 555 557 562 12. Files and Folder Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 571 12.1 12.2 12.3 12.4 12.5 12.6 12.7 Finding the Paths of the Most Useful Folders on Disk Writing to and Reading from Files Creating Folders on Disk Enumerating Files and Folders Deleting Files and Folders Securing Files on Disk Saving Objects to Files 573 575 580 581 586 590 595 13. Camera and the Photo Library . . . . . . . . . . . . . . . . . . . . . . . .
iOS 6 SDK makes this much simpler. There are two main ways of customizing a switch: Tint Colors Tint colors are colors that you can apply to a UI component such as a UISwitch. The tint color will be applied on top of the current color of the component. For instance, in a normal UISwitch, you will be able to see different colors. When you apply the tint color on top, the normal color of the control will be mixed with the tint color, giving a flavor of the tint color on the UI control. Images A
code snippet, we have coded a method named roundedValuesIn Rect:. The sole purpose of this method is to round the x, y, width, and height of a given CGRect structure and return the rounded values as a CGRect. The reason we are doing this is that on iOS Simulator, if any of the x, y, width, or height of your UI Components are not round, the controls may appear blurry on the screen. This is just an artifact of the iOS Simulator and does not appear on real iOS devices, so you can code without having