UINavigationController donesn't work correctly

Question

Code:

UINavigationController * childNaviVC = [[UINavigationController alloc] initWithRootViewController:self.subVC];
[self addChildViewController:childNaviVC];
[self.view addSubview:childNaviVC.view];
[childNaviVC.view setFrame:CGRectMake(0.0f, 0.0f, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
self.subVC.view.frame = childNaviVC.view.frame;
[childNaviVC.view addSubview:self.subVC.view];
[childNaviVC didMoveToParentViewController:self];

what i want to do is add a UINavigationController (childNaviVC) as sub viewcontroller (subVC) of the designated VC, and use the UINavigationController's root viewController to display the content; the problem which i met is UINavigationController's root view(subVC) size is consistent with UINavigationController's parent VC

the red view size isn't equal to the cyan

thanks

Can you show what kind of Output you are expecting ? any sample screen shot ? — CodeChanger, Feb 24 '17 at 11:01
why do you have the line `self.subVC.view.frame = childNaviVC.view.frame;`? the navigation controller should manage its child view, did you see that it wasn't? Also if that was the case you should be setting the frame to the superView's bounds. — Jon Rose, Mar 01 '17 at 14:24
I have tried to set the `childNaviVC` frame , but it doesn't work — Snail, Mar 02 '17 at 04:50
It would help if your example code said which view was which color. (and if you included the code all the way up to the UIWindow instead of just these few view controllers) — Kyle Howells, Mar 03 '17 at 16:35

score 0 · Answer 1 · answered Mar 05 '17 at 02:03

One issue is that you are double adding the subview's view. The addSubView for the subVC will be breaking the auto layout constraints within your navigation controller.

Change your calls to match the following and see what results you get:

UINavigationController * childNaviVC = [[UINavigationController alloc] initWithRootViewController:self.subVC];
[self addChildViewController:childNaviVC];
[self.view addSubview:childNaviVC.view];
[childNaviVC.view setFrame:self.view.bounds];
[childNaviVC didMoveToParentViewController:self];

score -1 · Answer 2 · answered Feb 28 '17 at 07:37

-1

Add the function viewDidLayoutSubviews to children VC ,and it worked. -(void)viewDidLayoutSubviews{

    self.view.frame=CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
}

answered Feb 28 '17 at 07:37

Snail

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may i know in which controller `viewDidLayoutSubviews` class you have to write this frame setting ? – CodeChanger Feb 28 '17 at 13:11
it is `self.subVC` – Snail Mar 01 '17 at 02:24
it is real work – Snail Mar 09 '17 at 01:40

UINavigationController donesn't work correctly

2 Answers2