添加子视图控制器
- Call the
addChildViewController:method of your container view controller.
This method tells UIKit that your container view controller is now managing the view of the child view controller. - Add the child’s root view to your container’s view hierarchy.
Always remember to set the size and position of the child’s frame as part of this process. - Add any constraints for managing the size and position of the child’s root view.
- Call the
didMoveToParentViewController:method of the child view controller.
Example
- (void)displayContentController:(UIViewController*)content {
[self addChildViewController:content];
content.view.frame = [self frameForContentController];
[self.view addSubview:content.view];
[content didMoveToParentViewController:self];
}
移除子视图控制器
- Call the child’s
willMoveToParentViewController:method with the valuenil. - Remove any constraints that you configured with the child’s root view.
- Remove the child’s root view from your container’s view hierarchy.
- Call the child’s
removeFromParentViewControllermethod to finalize the end of the parent-child relationship.
Example
- (void)hideContentController:(UIViewController *)content {
[content willMoveToParentViewController:nil];
[content.view removeFromSuperview];
[content removeFromParentViewController];
}
