iOS 应用获取最上层 Window 的正确方法

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今天帮同事看bug,看到他用[[UIApplication sharedApplication].windows lastobject]来获取最上层window,添加view后,不显示。

demo地址:https://github.com/xuaimian/TopLevelWindow

所以整理了下面的方法:

方法一:

-(UIWindow *)topLevelWindowGet

{

UIWindow *topView = [UIApplication sharedApplication].keyWindow;

for (UIWindow *win in [[UIApplication sharedApplication].windows  reverseObjectEnumerator]) {

if ([win isEqual: topView]) {

continue;

}

if (win.windowLevel > topView.windowLevel && win.hidden != YES ) {

topView =win;

}

}

return topView;

}


方法二:


UIWindow *topView = [UIApplication sharedApplication].keyWindow;

[topView endEditing:Yes];

return topView;

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