By Sarah Allen, Vidal Graupera, Lee Lundrigan

Learn the idea at the back of cross-platform improvement, and placed the speculation into perform with code utilizing the priceless info offered during this ebook. With in-depth assurance of improvement and distribution strategies for iPhone, BlackBerry, home windows cellular, and Android, you are going to research the local method of operating with every one of those systems. With precise assurance of rising frameworks like PhoneGap and Rhomobile, you are going to examine the paintings of making purposes that may run throughout all units. you will even be brought to the code-signing technique and the distribution of functions during the significant program shops, together with examine In movement (BlackBerry), Apple, and Microsoft.

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Example text

You also are going to need a Label, which will be used to display the text greeting, and a Text Field in which the user will enter his or her name. Search for those and also drag them to the view. With all the UI components for the application placed in the view, you may align them properly on the screen. 21 22 CHAPTER 2: iPhone Figure 2–5. Interface Builder View with UI Elements Align the Text Greeting The Label element will display the greeting. In this example, it will display centered at the top of the screen.

You need to declare an IBOutlet for each UI component in your view that you will interact with programmatically. As you can see in Listing 2–1, you need to declare a UILabel and UITextField IBOutlets when you define their corresponding variables. IBActions are callback methods defined in your view 23 24 CHAPTER 2: iPhone controller; these are called by actions that happen in your view. You can assign these actions in Interface Builder or programmatically in your view controller. The @property keyword will auto-generate accessors (that is, getters and setters).

At this point, your code should like Listing 2–5. CHAPTER 2: iPhone Figure 2–8. Interface Builder UIWebView Listing 2–5. h> @interface iWebkitDemoViewController : UIViewController { IBOutlet UIWebView *webView; } @property (nonatomic, retain) UIWebView *webView; @end You just created the code representation of the Web View. This allows you to interact with the Web View and use getters and setters on it to manipulate it. m. It’s time to add the implementation that will turn your view into a semi-functional web browser.

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