如何重置根視圖控制器

Question

是否可以重置根視圖控制器？重置意味着重置它的初始狀態，所以viewDidLoad將被再次調用。我正在使用UITabBarController，當我註銷時，我希望先前加載的所有選項卡都被卸載。

Answer 1

您可以通過註銷行動TabBarController的情況下設置爲RootViewController的做到這一點。

夫特3：

let storyBoard = UIStoryboard(name: "Main", bundle: nil) 
let tabBarController = storyBoard.instantiateViewController(withIdentifier: "TabBarController") as! UITabBarController 
UIApplication.shared.keyWindow?.rootViewController = tabBarController 
UIApplication.shared.keyWindow?.makeKeyAndVisible() 

目標C：

UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"Main" bundle:nil]; 
UITabBarController *tabBarController = [storyBoard instantiateViewControllerWithIdentifier:@"TabBarController"]; 
[[[UIApplication sharedApplication] keyWindow] setRootViewController:tabBarController]; 
[[[UIApplication sharedApplication] keyWindow] makeKeyAndVisible]; 

Answer 2

如果您使用的是Tabbarcontroller導航控制器然後導航到導航控制器，否則去Tabbarcontroller原樣

let appDelegate = UIApplication.shared.delegate as! AppDelegate 
let mainStoryboard = UIStoryboard(name: "Main", bundle: nil) 
let tabBar = mainStoryboard.instantiateViewControllerWithIdentifier("TabBarController") as! TabBarController 
appDelegate.window?.rootViewController = tabBar 
appDelegate.window?.makeKeyAndVisible() 

Answer 3

的UIViewController設置view屬性nil

UIApplication.shared.keyWindow?.rootViewController?.view = nil 

它會強制UIViewController從下一次撥打self.view