有没有办法在一段时间后关闭无按钮UIalertView？

Question

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"tittle"
               message:@""
                 delegate:self
              cancelButtonTitle:@""
              otherButtonTitles:nil];
  [alertView show];
  [alertView release];

我想在显示一段时间后取消alerview，但是当alertview没有按钮时，如果我调用-dismissWithClickedButtonIndex:animated: method和performSelector:withObject:afterDelay:它performSelector:withObject:afterDelay:是否还有其他消除方法呢？ 感谢您的任何想法！

Answer 1

-(void)xx  {
     [self performSelector:@selector(dismissAlertView:) withObject:alertView afterDelay:2];
}
-(void)dismissAlertView:(UIAlertView *)alertView{
    [alertView dismissWithClickedButtonIndex:0 animated:YES];
}

就是这样。我修复它

Answer 2

使用10秒延迟来解雇

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
    [alertController dismissViewControllerAnimated:YES completion:^{
        p\Perform Action after dismiss alertViewController
    }];
});

Answer 3

在Xamarin.iOS / Monotouch中，这对我有用：

private async Task ShowToast(string message, UIAlertView toast = null)
    {
        if (null == toast)
        {
            toast = new UIAlertView(null, message, null, null, null);
            toast.Show();
            await Task.Delay(2000);
            await ShowToast(message, toast);
            return;
        }

        UIView.BeginAnimations("");
        toast.Alpha = 0;
        UIView.CommitAnimations();
        toast.DismissWithClickedButtonIndex(0, true);
    }

请记住，如果从后台线程（而不是主UI线程）调用异步方法，则仍需要InvokeOnMainThread。 这只是意味着您像这样调用上述方法：

 BeginInvokeOnMainThread(() =>
 {
   ShowToast(message);
 });

Answer 4

deprecated UIAlertView更新至以上答案。

第二个功能应该是这样的

-(void)dismissAlertView:(UIAlertController *)alertView{

  [alertView dismissViewControllerAnimated:YES completion:nil];
}