在呈现模态时，“不鼓励在分离的视图控制器上呈现视图控制器”消息
我有一个导航控制器和根视图。 然后在那个根视图中，我推了一个视图，我必须点击以观察内容，如果login，如果没有logging它，它会打开一个模式视图控制器与下面的代码。
var vc = self.storyboard?.instantiateViewControllerWithIdentifier("LoginViewController") as! LoginViewController self.tabBarController!.presentViewController(vc, animated: true, completion: nil) 在viewdidload（）我有一个nsnotification，以便我可以得到通知时，从login模式用户loggedinback
NSNotificationCenter.defaultCenter().addObserver(self, selector: ("didDismissSecondViewController:"), name: "SecondViewControllerDismissed", object: nil)
在所有的工作之后，我在Login Controller中写下了下面的代码
self.dismissViewControllerAnimated(true, completion: {NSNotificationCenter.defaultCenter().postNotificationName("SecondViewControllerDismissed", object: nil, userInfo: nil)});
所以在我的第一个视图控制器中，我写了下面的代码
func didDismissSecondViewController(sender: AnyObject) { NSLog("Called ns notifications") dispatch_async(dispatch_get_main_queue(),{ let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil) if Reachability.isConnectedToNetwork() == true { let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil) let vc : VideoPlayViewController = storyboard.instantiateViewControllerWithIdentifier("video") as! VideoPlayViewController vc.movieUrl = self.movieURL NSLog("URL:- \(self.movieURL)") let navigationController = UINavigationController(rootViewController: vc) self.presentViewController(navigationController, animated: true, completion: nil) } else { var alert = UIAlertView(title: "No Internet connection", message: "Please ensure you are connected to the Internet. Connect to internet and and choose any sorting option to reload.", delegate: self, cancelButtonTitle: "Cancel") alert.addButtonWithTitle("Ok") alert.show() } }) }
但是，在试图在解除login控制器后显示视图控制器时，显示“呈现视图控制器在分离的视图控制器上不被鼓励”错误并崩溃。
感谢上帝，我find了答案！
var viewCon:UIViewController = self.presentingViewController! self.dismissViewControllerAnimated(true, completion: {let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil) let vc : VideoPlayViewController = storyboard.instantiateViewControllerWithIdentifier("video") as! VideoPlayViewController vc.movieUrl = self.movieUrl let navigationController = UINavigationController(rootViewController: vc) viewCon.presentViewController(navigationController, animated: true, completion: nil)});