如何在整个屏幕

Question

我试图把叠加图像在整个iPhone的屏幕（超过导航和的TabBar也）从viewDidLoad添加图片，但没有任何反应。

self.imageView = [[UIImageView alloc] 
           initWithImage:[UIImage imageNamed:@"overlayimage.png"]]; 
UIWindow* window = [[UIApplication sharedApplication] keyWindow]; 
    [window.rootViewController.view addSubview: imageView]; 

UITapGestureRecognizer * recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)]; 
    recognizer.delegate = self; 
    [imageView addGestureRecognizer:recognizer]; 
    imageView.userInteractionEnabled = YES; 
    self.imageView = imageView; 

这是我试图得到的结果：

Answer 1

由于UIWindow是UIView一个子类，还可以添加子视图的重要窗口。
这些子视图将出现在任何视图控制器上方。

UIWindow *keyWindow = [[[UIApplication sharedApplication] delegate] window]; 
[keyWindow addSubview:imageView]; 

Answer 2

imageView.frame = [[UIScreen mainScreen] applicationFrame]; 
[self.navigationController.view addSubview: imageView];