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copied!<p>I normally don't touch <code>MainWindow.xib</code>. I suggest the following:</p> <ol> <li><p>Create a <code>MainController</code> which will be your MainView that subclass <code>UIViewController</code> by going to <code>File > New > New File</code>. That will create a .h/.m and nib file for each ViewController. There add whatever UI you want for your app. For Example, add two buttons and wire those buttons to <code>IBActions</code> in your MainController. This should be declared and implemented in your <code>MainController.{h/m}</code>, respectively.</p></li> <li><p>After that create another two ViewControllers, the same way. </p></li> <li><p>The body of those IBActions should create an instance of the your ViewControllers and then push them.</p></li> </ol> <p>It would look something like this:</p> <pre><code>YourViewController *yvc = [[YourViewController alloc] init]; [self.navigationController pushViewController:yvc animated:YES]; [yvc release]; </code></pre> <p>Finally, you have to push the MainController in your <code>AppDelegate</code> and add your <code>NavigationController</code> to the view.</p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { MainViewController *mvc = [[MainViewController alloc] init]; UINavigationController *unvc = [[UINavigationController alloc] init]; [unvc pushViewController:mvc animated:NO]; [mvc release]; [self.window addSubview:unvc.view]; [self.window makeKeyAndVisible]; return YES; } </code></pre>

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