如何删除_UIAlertNormalizingOverlayWindow

Question

在我的应用程序中,当应用程序转到后台时,我需要删除窗口中可见的任何警报.但问题是,我不想忽略它

[alert dismissWithClickedButtonIndex:0 animated:YES]

因为,它会触发clickedButtonAtIndexDelegate并调用一个方法.当应用程序转到后台时,我不想避免这种情况.

我通过使用以下代码从窗口的子视图中删除alertView成功完成了它

  for (UIWindow *window in [UIApplication sharedApplication].windows) {
        for (UIView *view in [window subviews]) {
            if ([view isKindOfClass:[UIAlertView class]]) {
                [view removeFromSuperview];
            }

        }

但问题是,_UIAlertNormalizingOverlayWindow仍然存在,它会阻止用户Interaction.I需要删除_UIAlertNormalizingOverlayWindow也从我的窗口.请帮我这样做,或者请建议任何替代方案来实现解决方案.

Answer 1

虽然这不是一个非常干净的解决方案（假设 ivarBOOL _backgroundAlertFlag

- (void)applicationDidEnterBackground:(UIApplication *)application {
    _backgroundAlertFlag = YES;

    // find your UIAlertView as you are doing already

    [alert dismissWithClickedButtonIndex:0 animated:NO];
    _backgroundAlertFlag = NO;
}

然后在你的UIAlertViewDelegate方法中：

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if( !_backgroundAlertFlag )
    {
        // handle alert processing normally here
    }
    // other wise ignore (just dismiss)
}