ios - 如何重置 Root View Controller

Question

是否可以重置 Root View Controller ？重置是指将其重置为初始状态，以便再次调用 viewDidLoad。我正在使用 UITabBarController，当我注销时，我希望卸载之前加载的所有选项卡。

Answer 1

您可以通过在注销操作时将 TabBarController 的实例设置为 rootViewController 来做到这一点。

swift 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()

objective-c :

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