ios 调用了dismissViewControllerAnimated 但ViewController 没有被解除

dismissViewControllerAnimated is called but ViewController is not dismissed

提问by Ad Taylor

I am having a problems with the dismissViewControllerAnimatedmethod not closing down the view.

我在使用dismissViewControllerAnimated不关闭视图的方法时遇到问题。

What is happening in the app here is:

应用程序中发生的事情是：

• Cell in ItemViewControlleris selected.
• View is pushed to ItemDetailViewControllerand details are sent through a delegate
• User selects 'done' and the event is sent via a delegate to be closed in ItemViewController

• 单元格输入ItemViewController被选中。
• 视图被推送到ItemDetailViewController并通过委托发送详细信息
• 用户选择“完成”并通过委托发送事件以关闭 ItemViewController

All of this works except for the View is not dismissed, there are no errors. Can anyone see what is wrong?

所有这些都有效，除了 View 没有被关闭，没有错误。任何人都可以看到有什么问题吗？

- (void)itemDetailViewControllerDidFinish:(ItemDetailViewController *)controller
{
    NSLog(@"Controller: %@", controller);
    // Returns - Controller: <ItemDetailViewController: 0x6b68b60>

    [self dismissViewControllerAnimated:YES completion:nil];
}

回答by Nick Lockwood

What if you call [controller.navigationController popViewControllerAnimated:YES]instead?

如果你打电话[controller.navigationController popViewControllerAnimated:YES]呢？

For that matter, what if you call [controller dismissViewControllerAnimated:YES completion:nil]instead of calling it on self?

就此而言，如果您调用[controller dismissViewControllerAnimated:YES completion:nil]而不是调用 self 呢？

回答by Leander

The answer is in this page: dismissviewcontrolleranimated-vs-popviewcontrolleranimated

答案在这个页面： dismissviewcontrolleranimated-vs-popviewcontrolleranimated

dismissViewController is used when you do not have a navigationcontroller. Most probably you are using a navigation controller, then use self.navigationController popViewController instead.

当您没有导航控制器时，使用dismissViewController。很可能您正在使用导航控制器，然后使用 self.navigationController popViewController 代替。

Also take note of lemax his remark: use NULL, not nill for the completionhandler

还要注意 lemax 他的评论：对完成处理程序使用 NULL，而不是 nill

回答by Danoli3

I had a problem in iOS5 where the standard completion callback was not allowing the view to completely dismiss (only the current pushed view of that modal)

我在 iOS5 中遇到了一个问题，其中标准完成回调不允许视图完全关闭（只有该模式的当前推送视图）

[controller dismissViewControllerAnimated:YES completion:^ {
     //
 }];

Solution for iOS5is to not have a callback:

iOS5 的解决方案是没有回调：

[controller dismissViewControllerAnimated:YES completion:nil];

回答by Cbas

Had a problem where calling dismissViewControllerAnimateddismissed the keyboard in a UIViewController, but not the view itself.

有一个问题，调用dismissViewControllerAnimated在 UIViewController 中关闭了键盘，而不是视图本身。

Solved it by using two calls:

通过使用两个调用解决了它：

[self dismissViewControllerAnimated:NO completion:nil];
[self dismissViewControllerAnimated:YES completion:nil];

an instant one for the keyboard, then an animated one for the controller

键盘的即时一个，然后控制器的动画

回答by Arya

Your Situation is - ItemViewController -> ItemDetailViewController (pushed on navigationController) Self.dismissViewController(..) dismiss a view controller that is presented over self(in ur case it is ItemViewController). Here, u did not presented any VC over self, instead u pushed a new VC over navigation stack. So, Correct way to dismiss ItemDetailViewController would be

你的情况是 - ItemViewController -> ItemDetailViewController（推送到导航控制器上） Self.dismissViewController(..) 关闭一个呈现在 self 上的视图控制器（在你的情况下它是 ItemViewController）。在这里，你没有在 self 上展示任何 VC，而是在导航堆栈上推送了一个新的 VC。因此，关闭 ItemDetailViewController 的正确方法是

self.navigationController.popViewController(true). please read the description of dismissViewController(....) to get more clarity.

self.navigationController.popViewController(true)。请阅读dismissViewController(....) 的描述以获得更清晰的信息。