imageView已被navigationItem遮挡

Question

I found some sample code.

It show the view by following code in AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.

    UILocalNotification *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];

    if (notification) {
        NSLog(@"AppDelegate didFinishLaunchingWithOptions");
        application.applicationIconBadgeNumber = 0;
    }

    AITPreviewViewController *previewViewController = [[AITPreviewViewController alloc] initWithNibName:@"AITPreviewViewController" bundle:nil];

    navigationController = [[UINavigationController alloc]initWithRootViewController:previewViewController];

    [self.window setRootViewController:navigationController] ;

    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

The following picture is in the AITPreviewViewController.xib .

But the View is not normal when it run on the iPhone , it show like the following picture.

The three imageView on the top has been obstructing by navigationItem

But when I turn to other View , and use the following code to turn back.

UIViewController *Previewer = [[AITPreviewViewController alloc] initWithNibName:@"AITPreviewViewController" bundle:nil] ;

    Previewer.edgesForExtendedLayout = UIRectEdgeNone;

    [self.navigationController pushViewController:Previewer animated:YES];

It show the normal View like the following picture.

The View only show not normal at first time... What happened to this condition ?

Can it use Auto-layout to solve this problem ?

Answer 1

If you don't want to hide navigation bar then in your xib just make a little change

Just change the Top Bar property from none to as shown in image. It will auto place your image below the navigation bar

Answer 2

Try increasing the 'Y' value for those 3 images from your interface builder. Select each image and then go to Size Inspector. There you will see some values. Find the Y value and increase it. This will push the images down.

Answer 3

如果您只想根据“ AITPreviewViewController.xib”显示UI，则可以隐藏导航栏。