当用户单击UILocalNotification时，我试图迅速从应用程序委托中加载特定的ViewController。我已经知道这是在此函数中调用的：
func application(application: UIApplication!, didReceiveLocalNotification notification: UILocalNotification!)
但是当我尝试访问一个打开的ViewController时，我认为它返回null，因为我的应用程序崩溃了。这是我正在尝试的：
var rootViewController = self.window!.rootViewController var storyBoard = rootViewController.storyboard var setViewController = storyBoard.instantiateViewControllerWithIdentifier("CurrentShows") as ViewController_CurrentShows rootViewController.navigationController.popToViewController(setViewController, animated: false) setViewController.reloadData()
在popToViewController行上崩溃了。
您可以尝试：
let rootViewController = self.window!.rootViewController let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil) let setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("CurrentShows") as! DetailViewController rootViewController?.navigationController?.popToViewController(setViewController, animated: false)
斯威夫特3：
let mainStoryboard = UIStoryboard(name: "Main", bundle: nil) let controller = mainStoryboard.instantiateViewController(withIdentifier: "viewController") self.present(viewController, animated: true, completion: nil)
