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copied!<p>As mentioned above, you probably want to change your <code>performSelector</code> command to:</p> <pre><code>[self performSelector: @selector(pushSecondController) withObject: nil afterDelay: 5.0f]; </code></pre> <p>because you want it to call your <code>pushSecondController</code> method, and not <code>pushViewController:animated:</code>.</p> <p>Regarding your second question: the difference between <code>methodName</code> and <code>methodName:</code> is that the <code>:</code> at the end of <code>methodName:</code> signifies that this method takes a parameter. So, you could have the following methods:</p> <pre><code>- (void)listItems { // ... } - (void)insertItem:(NSDictionary *)item { // ... } </code></pre> <p>When passing a reference to them into <code>@selector</code>, for the first method you'd just do <code>@selector(listItems)</code>, because it takes no parameters, and for the latter you'd do <code>@selector(insertItem:)</code> because it takes a parameter.</p> <p><strong>UPDATE</strong></p> <p>Just saw your <code>applicationDidLaunch</code> code. You probably want to rearrange things so that you add your <code>ViewController</code> to your <code>UINavigationController</code>, and then set the <code>UINavigationController</code> as the rootViewController of your window. Like so:</p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil]; self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController]; self.window.rootViewController = self.navigationController; [self.window makeKeyAndVisible]; return YES; } </code></pre>

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