是什么原因导致状态栏与视图重叠？

Question

知道状态栏在presentModalViewController->dismissModalViewControllerAnimated

之后与视图重叠的原因

Xcode：4.2 SDK：iOS 5 部署目标：3.2 ARC：ON

Answer 1

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    UIViewController* currentViewController = [self getCurrentViewController];
    return [currentViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}

更改为：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    UIViewController* currentViewController = [self getCurrentViewController];
    return [currentViewController canRotate]; // the implement is exactly as same as shouldAutorotateToInterfaceOrientation:
}

解决了这个问题，但我不明白为什么。