Objective c 从苹果到我的答案。每个屏幕一个控制器。对于您的Tabbar问题：Tabbar控制器“呈现”您的实际viewcontroller，它不处理来自您视图的交互。这是一个很好的链接。谢谢我还观看了关于视图控制器控制的wwdc11演讲。这是一个很好的链接。谢谢我还观

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从苹果到我的答案。每个屏幕一个控制器。对于您的Tabbar问题：Tabbar控制器“呈现”您的实际viewcontroller，它不处理来自您视图的交互。这是一个很好的链接。谢谢我还观看了关于视图控制器控制的wwdc11演讲。这是一个很好的链接。谢谢我还观看了关于视图控制器控制的wwdc11演讲。

[self.view addSubView: viewControllerB.view];

[self addChildViewController:viewControllerB];

    #import "ViewControllerB.h"

ViewControllerB *newController = [[ViewControllerB alloc]init];
[self presentModalViewController:newController animated:YES];

[self.presentingViewController dismissModalViewControllerAnimated:YES];

Each custom view controller object you create is responsible for managing exactly 
one screen’s worth of content. The one-to-one correspondence between a view controller 
and a screen is a very important consideration in the design of your application. 
You should not use multiple custom view controllers to manage different portions 
of the same screen. Similarly, you should not use a single custom view controller 
object to manage multiple screens worth of content.