ViewController和自动布局旋转问题

Question

Hi I'm creating my custom viewcontroller hierarchy with the following code. However the autolayout I set in the subview does not seems to work. When I rotate the device, the subview does not stretch to fit the screen.

_postVC = [[POSTViewController alloc] initWithNibName:@"POSTViewController" bundle:nil];
[self addChildViewController:_postVC];
[_postVC didMoveToParentViewController:self];

[self.mainView addSubview:_postVC.view];

_postVC.view doesn't stretch to be the same width as self.mainView after rotation.

Answer 1

you need to:

_postVC.view.frame = self.mainView.bounds // 1 _postVC.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight // 2

before adding _postVC.view as a subview of self.mainView .

this way, 1. _postVC.view is made to fit self.mainView , and 2. _postVC.view is configured to resize both vertically and horizontally when self.mainView is resized.