使用[window addSubview ] 导致 UIView 移位的处理

直接在application: didFinishedLauchingWIthOptions 里使用

[window addSubview:mainController.view]

时，会导致添加的View 上移一个status bar的高度，使得UIView 在页面上显示不完整。

只要在[window addSubview:mainController.view]

之前，调用以下方法处理就行了。

 

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    
    // Override point for customization after application launch.
    
	mainController = [[MainController alloc] initWithNibName:@"MainView" bundle:nil];
	CGAffineTransform t = CGAffineTransformMakeTranslation(0.0, 20.0);
	[mainController.view setTransform:t];
	
	[window addSubview:mainController.view];
    [window makeKeyAndVisible];
    return YES;
}