dismissViewControllerAnimated在块中不起作用 [英] dismissViewControllerAnimated does not work within a block

问题描述

在显示 UIAlertController 之后，我尝试关闭 UIViewController 。

I try to close a UIViewController after an UIAlertController has been shown.

这是我的代码：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title 
                                                                         message:msg
                                                                  preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"Accept" 
                                                   style:UIAlertActionStyleDefault 
                                                 handler:^(UIAlertAction *action)
             {
                 [self dismissViewControllerAnimated:YES completion:nil];
             }];

[alertController addAction:okAction];
[self presentViewController:alertController animated:YES completion:^{}];

然而， self 永远不会被解雇。有人知道如何解决这个问题吗？

However, self never gets dismissed. Anyone knows how to solve this?

更新

如果我设置 [self dismissViewControllerAnimated：YES completion：nil]; 在块之外，它可以工作。

if I set [self dismissViewControllerAnimated:YES completion:nil]; outside of the block, it works.

推荐答案

如果有人遇到同样的问题。我推了 UIViewController ，我没有用 presentViewController：animated：completion：来呈现它。这就是为什么应该使用 [self.navigationController popViewControllerAnimated：YES]; 。

In case someone is having the same issue. I pushed the UIViewController, I didn't present it with presentViewController:animated:completion:. That's why [self.navigationController popViewControllerAnimated:YES]; should be used instead.

奇怪的是 [self dismissViewControllerAnimated：YES completion：nil]; 在街区之外工作并且没有在里面，我对此没有解释......

The strange thing is that [self dismissViewControllerAnimated:YES completion:nil]; worked outside of the block and didn't inside, I have no explanation for this...

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