如何在子视图中使用addChildViewController [英] how to use addChildViewController in subview

问题描述

我想在View(子视图数组的一个视图)中使用addChildViewController，但我对此一无所知.这是我的代码:

I want to use addChildViewController in View (one view fro subviews array) but I don't know about that. this is my code :

for (UIView *subview in self.view.subviews) {
        if (subview.tag == 1) {
            CartView *cart = [[CartView alloc]init];

            [cart willMoveToParentViewController:????];/* (UIViewController*) from subview*/
            [cart.view setFrame:CGRectMake(0.0f,CGRectGetHeight(self.view.frame),CGRectGetWidth(self.view.frame),CGRectGetHeight(self.view.frame))];
            [UIView beginAnimations:nil context:nil];
            [UIView setAnimationDuration:0.3];
            [cart.view setFrame:CGRectMake(0.0f,0,CGRectGetWidth(self.view.frame),CGRectGetHeight(self.view.frame))];
            [UIView commitAnimations];
            [subview addSubview:cart.view];
            [???? addChildViewController:cart];
            [cart didMoveToParentViewController:????];
        }
    }

我不知道如何从子视图中获取UIViewController * ！！！

I don't know how to get UIViewController* from subview!!!!

推荐答案

摘自Apple文档:

(这里的内容被视为子控制器)

(Here content is considered as child controller)

将另一个视图控制器的视图添加到容器的视图层次结构中

Adding another view controller’s view to the container’s view hierarchy

- (void) displayContentController: (UIViewController*) content;
{
   [self addChildViewController:content];                 // 1
   content.view.frame = [self frameForContentController]; // 2
   [self.view addSubview:self.currentClientView];
   [content didMoveToParentViewController:self];          // 3
}

以下是代码的作用:

1. 它调用容器的addChildViewController:方法添加子项.调用addChildViewController:方法还会自动调用子级的willMoveToParentViewController:方法.
2. 它访问子级的view属性以检索视图并将其添加到其自己的视图层次结构中.容器会在添加视图之前设置孩子的大小和位置；容器始终选择显示儿童内容的位置.尽管此示例通过显式设置框架来完成此操作，但您也可以使用布局约束来确定视图的位置.
3. 它显式调用子级的didMoveToParentViewController:方法以表明操作已完成

所以，在您的情况下，您试图将ViewController添加到视图中不起作用. CartView应该是UIViewController而不是UIView

So ,in your case you are trying to add ViewController to your view which doesn't work. The CartView should be a UIViewController not UIView

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