如何访问超级视图控制器? [英] How does one access a super's view controller?

问题描述

我有一个问题，我会尽力解释这个问题:

I have a problem and I will try to explain the issue:

1. 我有一个主要的 UIViewController(全屏)
2. 我有一个辅助 UIViewController (setbounds)

3. 我使用以下方法将辅助视图添加到了 mainView:

1. I have one main UIViewController (Whole screen)
2. I have one secondary UIViewController (setbounds)

3. I added my secondary view to my mainView using this:

[mainController.view addSubview:secondaryController.view];   

我创建了第三个控制器:modalController，我像这样将它添加到我的辅助控制器:

I created a third controller: modalController, I added it to my secondary controller like this:

[secondaryController presentModalViewController:modalController animated:YES];

我根据 modelController 中的一些事件进行微积分.

I make calculus based on some events inside of my modelController.

我可以使用以下命令将消息从我的 modalController 发送到我的 secondaryController:

I am able to send messages from my modalController to my secondaryController using:

[[self parentViewController]  performSelector : @selector(myMethodInSecondaryController:) withObject : myObject afterDelay : .5];

注意:self"对应于modalController

我需要将myObject"传递给我的 mainController，但我无法从 secondaryController 引用我的 mainController.我试过这个:

I need to pass "myObject" to my mainController, but i cant make reference to my mainController from the secondaryController. I tried this:

[[self parentViewController] performSelector : @selector(myMethodInMainController:) withObject:myObject afterDelay : .5];

注意:self"对应于secondaryController

但它不起作用，我可以使用以下命令访问我的 mainController 视图:self.view.superview

but it doesn't work, i have access to my mainController's view using : self.view.superview

注意:self"是我的secondaryController

但对它的控制器没有.

but no to its controller.

推荐答案

在你的辅助控制器中，尝试

In your secondary controller, try

id mainViewController = [self.view.superview nextResponder];

并检查这是否是您正在寻找的视图控制器.

and check if this is the view controller you're looking for.

Apple 的 -[UIResponder nextResponder] 文档:

Apple's documentation of -[UIResponder nextResponder]:

UIView 通过返回管理它的 UIViewController 对象(如果有)或它的超视图(如果没有)来实现这个方法

UIView implements this method by returning the UIViewController object that manages it (if it has one) or its superview (if it doesn’t)

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