UIViewController是否可以呈现？

我有一个UIViewController（让我们称之为Fred），它可能被embedded到许多不同types的容器（UINavigationController，UITabBarController，或模态内）中。 弗雷德有一个button，当挖掘，需要让弗雷德全屏。

直观地说，这意味着我想将Fred作为全屏模式呈现，但是有两个问题：

1. Fred在视图层次结构中处于活动状态（无法呈现活动的vc）
2. 弗雷德需要出示自己？

我试图通过创build一个Fred可以像这样调用的fullscreenContainerViewController来解决这个问题：

[fullscreenContainer presentViewControllerAsFullscreen:self] 

FullscreenContainerViewController的实现：

 @property (nonatomic) UIViewController* proxyViewController // Create a proxy VC to hold state of the original ViewController so that we can safely // Remove it from it's hierarchy and then restore it after fullscreen is dismissed. - (void)presentViewControllerAsFullscreen:(UIViewController*)originalController { UIViewController* originalParentViewController = originalController.parentViewController; UIView* originalSuperview = originalController.view.superview; self.proxyViewController = [[UIViewController alloc] init]; self.proxyViewController.view = [[UIView alloc] initWithFrame:originalController.view.frame]; self.proxyViewController.view.autoresizingMask = originalController.view.autoresizingMask; // Detach contentController from parent [originalController willMoveToParentViewController:nil]; [originalController.view removeFromSuperview]; [originalController removeFromParentViewController]; // Put in the proxy view controller in place of the orignalController [originalParentViewController addChildViewController:self.proxyViewController]; [originalSuperview addSubview:self.proxyViewController.view]; [self.proxyViewController didMoveToParentViewController:originalParentViewController]; originalController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self.proxyViewController presentViewController:originalController animated:YES completion:nil]; } 

然后解雇：

 - (void)dismissFullscreenWithCompletionHandler:(void (^)(void))completionHandler { UIViewController* parentToRestoreTo = self.proxyViewController.parentViewController; UIView* superviewToRestoreTo = self.proxyViewController.view.superview; [self.proxyViewController dismissViewControllerAnimated:YES completion:^(void) { // Detach proxy view/controller [self.proxyViewController removeFromParentViewController]; [self.proxyViewController.view removeFromSuperview]; self.proxyViewController = nil; // Restore original parent relationship [parentToRestoreTo addChildViewController:self.contentController]; [superviewToRestoreTo addSubview:self.contentController.view]; [self.contentController didMoveToParentViewController:parentToRestoreTo]; if (self.shouldRestoreStatusBar) { [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationSlide]; } }]; } 

这工作，但似乎反模式可能？ 也许它会以一些微妙的方式打破？ 有没有更好的方法来完成我想要完成的任务？