“viewWillTransitionToSize：”当视图控制器以模态显示时,在iOS 9中未调用

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 ...
}