相对严谨的一种获取方式
- (UIWindow *)lastWindow{
NSArray *windows = [UIApplication sharedApplication].windows;
for(UIWindow *window in [windows reverseObjectEnumerator]) {
if ([window isKindOfClass:[UIWindow class]] &&
CGRectEqualToRect(window.bounds, [UIScreen mainScreen].bounds))
return window;
}
return [UIApplication sharedApplication].keyWindow;
}
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