These are the steps to create a custom UIViewController and .XIB that take the place of the default MainWindow.xib.
1. Create a new Window-based Application.
2. Add a new UIViewController subclass.
– CHECK “With XIB for user interface”
– Save As “HelloViewController”
3. Edit HelloAppDelegate.h. Add the bold lines below.
#import <UIKit/UIKit.h> @class HelloViewController; @interface HelloAppDelegate : NSObject <UIApplicationDelegate]]> @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet HelloViewController *viewController; @end
4. Edit HelloAppDelegate.m. Add the bold lines below.
#import "HelloViewController.h"
@synthesize window = _window;
@synthesize viewController = _viewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window.rootViewController = self.viewController;
[self.windowmakeKeyAndVisible];
return YES;
}
- (void)dealloc
{
[_window release];
[_viewController release];
[super dealloc];
}
5. Open MainWindow.xib.
6. From the Objects list, drag a View Controller object onto the bar.
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7. Select newly added View Controller object.
8. Go to the Identity Inspector and change the Class to HelloViewController.
9. Go to the Connections Inspector and add a New Referencing Outlet, viewController = Hello App Delegate
10. Add a label to the HelloViewController.xib: “Hello World!”
11. Save, Build and Run
Click here to download the sample XCode project. It targets iOS 4.3 for the iPad.
Tags: ios, objective-c, xcode