我从另一个提出一个视图控制器：
- (void)showModalView
{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
MySecViewController *mySecViewController = [storyboard instantiateViewControllerWithIdentifier:@"secController"];
mySecViewController.delegate = self;
[self presentViewController:mySecViewController animated:YES completion:nil];
}
然后在呈现的UIViewController中,方法viewWillTransitionToSize：withTransitionCoordinator：在iOS 8中调用但不在iOS 9中调用…
谢谢
解决方法
在您当前的视图控制器中,如果您覆盖了viewWillTransitionToSize：withTransitionCoordinator :,请确保您调用super.否则,此消息将不会传播到子视图控制器.
对于Objective-C：
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
// Your other code ...
和斯威夫特：
override func viewWillTransition(to size: CGSize,with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size,with: coordinator)
// Your other code ...
}