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

问题描述

我有一个问题，我会尝试解释这个问题：

1. 我有一个主要的 UIViewController （整个屏幕）


2. 我有一个次要 UIViewController （setbounds）



3. 我使用此功能将我的次要资料检视加到我的 mainView ：

     [mainController.view addSubview：secondaryController.view]; 
     




4. 我创建了第三个控制器： modalController ，我添加到我的第二个控制器像这样：

     [secondaryController presentModalViewController：modalController animated：YES]; 
     




5. 我根据我的 modelController 。




6. 我可以从 modalController code> secondaryController 使用：

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

   注意：self对应于 modalController




7. 我需要将myObject传递给我的 mainController 但我不能参考从 secondaryController 中的 mainController 。我尝试这样：

     [[self parentViewController] performSelector：@selector（myMethodInMainController :) withObject：myObject afterDelay：。 
     

   注意：self对应于 secondaryController

   
   
   

   但它不工作，我有权访问我的mainController的视图使用： self.view.superview

   self是我的 secondaryController




，但不是其控制器。

解决方案

在您的辅助控制器中，尝试

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

并检查这是否是您要查找的视图控制器。

Apple的文档 - [UIResponder nextResponder] ：

UIView通过返回管理它的UIViewController对象（如果有）或其superview（如果没有）来实现这个方法

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

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];   
   

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

   [secondaryController presentModalViewController:modalController animated:YES];
   

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

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

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

   NOTE: "self" corresponds to the modalController

7. 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];
   

   NOTE: "self" corresponds to the secondaryController

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

   NOTE: "self" is my secondaryController

but no to its controller.

解决方案

In your secondary controller, try

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

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

Apple's documentation of -[UIResponder nextResponder]:

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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