UIAlertView 上方的 UIView [英] UIView above UIAlertView

问题描述

在我的应用中，使用了锁屏.有时会显示 UIAlertView，现在当用户将应用程序发送到后台并再次将其带到前面时，UIAlertView 会显示在锁定屏幕上方.是否有可能在所有内容之上添加 UIViewController 的视图，即在 UIAlertView 之上?

In my app, a lock screen is used. Sometimes a UIAlertView is shown, now when the user sends the app to the background and brings it in front again, the UIAlertview is shown above the lock screen. Is there a possibility to add a UIViewController's view above everything, i.e. above the UIAlertView?

推荐答案

你应该有这样的

UIWindow *mySpecialWindowForLockScreen = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];

//"Hey iOS Please put this window above all alert view"
mySpecialWindowForLockScreen.windowLevel = UIWindowLevelAlert+100;

UIViewController *lockScreenViewController = [[UIViewController alloc]init];//Lock Screen

lockScreenViewController.view.frame = mySpecialWindowForLockScreen.bounds;

mySpecialWindowForLockScreen.rootViewController = lockScreenViewController;


// In lockScreenViewController view you can add lock screen images and other UI stuff
mySpecialWindowForLockScreen.rootViewController.view.backgroundColor = [UIColor greenColor];

[mySpecialWindowForLockScreen makeKeyAndVisible];

每当您想隐藏 LockScreen 窗口时，只需通过 setHidden:YES 将其隐藏.

Whenever you want to hide the LockScreen window then simply hide it by setHidden:YES.

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