viewDidLoad被调用，viewWillAppear没有被调用，视图不会出现在屏幕上 [英] viewDidLoad gets called, viewWillAppear does not get called, view does not appear on screen

问题描述

更新

已经提到viewWillAppear和viewDidAppear不会根据文档调用。
然而，我没有在这些方法中执行初始化，也没有添加UI元素到视图中。

我只是使用它们来放置断点来尝试调试

其他想法？

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原始问题

我被骗了。我重构了一些代码，并遇到一些奇怪的行为....

我初始化viewController A没有一个nib，并以编程方式设置视图。

$

在viewController A的viewDidLoad中，我从一个nib初始化viewController B.

我添加viewControllerB.view作为viewControllerA.view的子视图

viewDidload控制器B被调用。

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然后变得奇怪：

1. viewWillAppear和viewDidAppear
   viewController B 从不获取
   调用。




2. viewControllerB.view




3. 没有错误。

   
   

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我检查的内容：

viewControllerBs Nib的名称是正确的。

viewControllerB的视图输出连接到视图。

viewControllerB

$ b b $ b

有什么想法吗？

解决方案

关闭此事：

我永远找不到一个解决方案，但从那时起，SDK 3.0是标准，点已经变得模糊。该代码在SDK的当前版本中正常工作。

Update

It has been mentioned that viewWillAppear and viewDidAppear do not get called per the docs. However, I perform no initialization within these methods and no adding UI elements to the view.

I was just using them to place break points to try to debug this.

Any other ideas?

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Original Question

I'm stumped. I'm refactoring some code and have come across some strange behavior....

I initialize viewController A without a nib and set the view programmatically.

viewDidLoad in controller A gets called.

Inside viewDidLoad of viewController A, I initialize viewController B from a nib.

I add viewControllerB.view as a subview of viewControllerA.view

viewDidload of controller B gets called.

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Then it gets weird:

1. viewWillAppear and viewDidAppear of viewController B never get called.

2. viewControllerB.view never makes it on screen.

3. No errors.

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Things I checked:

The name of the viewControllerBs Nib is correct.

The view outlet of viewControllerB is connected to a view.

viewControllerB and its view both are non-nil.

And to top it off, everything works great in SDK [redacted] beta 5!

Any ideas? It's got to be something silly..

解决方案

To close the matter:

I could never find a solution, but since then SDK 3.0 is the standard and the point has become moot. The code does work correctly in current versions of the SDK.

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