viewDidAppear没有被调用 [英] viewDidAppear not getting called

问题描述

在我的主UIViewController中，我将主屏幕视图控制器添加为子视图：

In my main UIViewController I am adding a homescreen view controller as subview's:

   UINavigationController *controller = [[UINavigationController alloc] initWithRootViewController:vc];
        controller.navigationBarHidden = YES;
        controller.view.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
        [self addChildViewController:controller];
        [self.view insertSubview:controller.view atIndex:0];
        [controller didMoveToParentViewController:self];    

问题是viewDidAppear和viewWillAppear只调用一次，就像viewDidLoad一样。为什么是这样？如何让它工作？

The issue is that viewDidAppear and viewWillAppear is only called once, just like viewDidLoad. Why is this? How do I make this to work?

基本上在vc中我没有得到viewDidAppear或viewWillAppear。

Basically inside vc I am not getting viewDidAppear nor viewWillAppear.

I也只是尝试在没有导航控制器的情况下添加UIViewController但它仍然不起作用：

I also just tried adding the UIViewController without the navigation controller and it still doesn't work:

vc.view.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);
        [self addChildViewController:vc];
        [self.view insertSubview:vc.view atIndex:0];
        [vc didMoveToParentViewController:self];    

推荐答案

使用presentModalViewController或segues或pushViewController呈现视图控制器应修复它。

Presenting view controllers using presentModalViewController or segues or pushViewController should fix it.

或者，如果由于某种原因你想要在没有内置方法的情况下显示你的视图，在你自己的代码中你应该手动调用这些方法。这样的事情：

Alternatively, if for some reason you want to present your views without the built-in methods, in your own code you should be calling these methods manually. Something like this:

[self addChildViewController:controller];
BOOL animated = NO;
[controller viewWillAppear:animated];
[self.view insertSubview:controller.view atIndex:0];
[controller viewDidAppear:animated];
[controller didMoveToParentViewController:self];   

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