ios - 无法关闭UIAlertView，按钮不可单击

我有以下代码，其中显示了MBProgress视图，然后在单独的线程中运行代码。然后，我得到了主线程的句柄，并关闭了工作的微调器，然后显示了UIAlertView。 UIAlertView加载正常，但是我无法单击任何按钮。如果警报视图在调度块之外，则可以正常工作。有任何想法吗？

[MBProgressHUD showHUDAddedTo:self.view animated:YES];
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{

    // Do something...
    GamePlayManager *gameManager = [GamePlayManager alloc];
    Session *sess = [Session sharedInstance];

    //Add the last actor to the end of the list
    NSMutableDictionary *connections = sess.connections;

    [connections setObject:sess.secondActor forKey:[NSString stringWithFormat:@"%d",kLastFieldtag]];

    BOOL result = [gameManager areAnswersCorrect:sess.connections startingActor:sess.firstActor endingActor:sess.secondActor];
    NSString *display = @"Sorry incorrect. Please recheck your answers.";

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Result"
                                                    message:display
                                                   delegate:self
                                          cancelButtonTitle:@"Cancel"
                                          otherButtonTitles:@"OK", nil];

    if (result)
    {
        display = @"You are correct! You Won!";

        if (sess.isMutiplayerGame)
        {
            [_gameCenterController endGame];

            [self showGameOverScreen:YES isMultiplayer:YES];
        }
        else
        {
            [self showGameOverScreen:YES isMultiplayer:NO];
        }

        dispatch_async(dispatch_get_main_queue(), ^{
            [MBProgressHUD hideHUDForView:self.view animated:YES];

            [alert show];
        });

    }
    else
    {
        dispatch_async(dispatch_get_main_queue(), ^{
            [MBProgressHUD hideHUDForView:self.view animated:YES];

            [alert show];
        });
    }
});

最佳答案

这可能是MBProgressHUD的动画和UIAlertView的动画之间发生冲突引起的问题。

我从未使用过MBProgressHUD，但是在GitHub上查看代码似乎他们已经解决了您的问题。 MBProgressHUD具有completionBlock属性。

这样的代码应该可以正常工作:(警告:未经测试)

dispatch_async(dispatch_get_main_queue(), ^{
    [MBProgressHUD HUDForView:self.view].completionBlock = ^{
        [alert show];
    };
    [MBProgressHUD hideHUDForView:self.view animated:YES];
});

视图完成动画后，MBProgressHUD触发其completionBlock，因此不再存在冲突。

附带说明MBProgressHUD方法:

- (void)showAnimated:(BOOL)animated
 whileExecutingBlock:(dispatch_block_t)block
             onQueue:(dispatch_queue_t)queue
     completionBlock:(MBProgressHUDCompletionBlock)completion;

似乎更适合您的代码。

关于ios - 无法关闭UIAlertView，按钮不可单击，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13888805/