objective-c - whose view is not in the window hierarchy! IOS

Question

1.现在遇到的问题是这样子： 工程里有 A B C 三个页面。
A present B页面，B push 到C 页面。
C 页面里有一个UIwebView ，加载了H5页面， H5页面有个按钮调用手机的相册 UIImagePickerController，弹出了拍照，相册选择的UIActionSheet, 然后我点击相册按钮，程序直接退出到了 A 页面。

2.我尝试用A push 到B 页面，B页面push 到C 页面，这样子的话，在点击相册后会到系统相册里面，选择图片后会返回到H5页面里。

3.我现在需要的是present 也能实现而不是用push。 我认为是根控制器的原因。因为C 这个页面是H5去实现的，所以我能做什么？

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我尝试了以下方案，

发现只要有present ，就是出现问题，而且提示问题就出现在present 那里

Answer 1

There is a solution you can try: put B and C in a UINavigationController for management, and use A to present the UINavigationController.

Answer 2

If this is to be implemented correctly, A present B page should present not B, but the navigationController with B as the root.

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:BController];
[self presentViewController:navigationController animated:YES completion:nil];

Answer 3

Write a solution to this, but I don’t know if there is any problem. This is how I solved it so far.
I guess it’s a problem with the root controller. Then now it’s time to change the root controller

Just modify window.rootviewcontroller, jump to present C and change window.rootviewcontroller
When C returns, change window.rootviewcontroller and change it back.

Answer 4

Solution
http://www.skyfox.org/present...