有没有办法在一段时间后关闭没有按钮的 UIalertView ?

发布于 2024-10-02 16:02:17 字数 453 浏览 0 评论 0原文

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关闭alerview,但是当alertview没有按钮时,如果我调用-dismissWithClickedButtonIndex:animated:方法和-performSelector:withObject,它就不起作用:延迟后: 还有其他方法可以驳回吗? 感谢您的任何想法!

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

i want to dimiss the alerview after it's showing for some time,but when the alertview has no button,it doesn't work if i invoked -dismissWithClickedButtonIndex:animated: methodand-performSelector:withObject:afterDelay:
is there any other way to dismiss it ?
thanks for any ideas!

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评论(4

自我难过 2024-10-09 16:02:17
-(void)xx  {
     [self performSelector:@selector(dismissAlertView:) withObject:alertView afterDelay:2];
}
-(void)dismissAlertView:(UIAlertView *)alertView{
    [alertView dismissWithClickedButtonIndex:0 animated:YES];
}

就是这样,我修好它

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

that's it.i fix it

梦萦几度 2024-10-09 16:02:17

使用 10 秒延迟来关闭

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
    }];
});

Use 10 seconds delays to dismiss

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
    }];
});
只是一片海 2024-10-09 16:02:17

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,则仍然需要 InvokeOnMainThread。
这仅仅意味着您像这样调用上面的方法:

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

In Xamarin.iOS / Monotouch this worked for me:

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);
    }

Remember that if an async method is called from a background thread (not the main UI thread) then InvokeOnMainThread would still be required.
This just means that you call the above method like this:

 BeginInvokeOnMainThread(() =>
 {
   ShowToast(message);
 });
乙白 2024-10-09 16:02:17

更新上面的答案,因为 UIAlertView弃用
在此链接回答

第二个函数应该是这样的

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

  [alertView dismissViewControllerAnimated:YES completion:nil];
}

update to the answer above as UIAlertView is deprecated
Answer At this Link

the 2nd function should be like this

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

  [alertView dismissViewControllerAnimated:YES completion:nil];
}
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