iPhone – 解雇RootViewController？

发布时间：2020-12-14 17:15:46 所属栏目：百科来源：网络整理

导读：我有一个RegistrationViewController和一个LoginViewController： LoginViewController是我的InitialViewController / RootViewController. 如果我注册并单击Registrate-Button,它将自动推送到MainViewController.如果我按下Logout-Button,它会关闭到Registr

我有一个RegistrationViewController和一个LoginViewController：

LoginViewController是我的InitialViewController / RootViewController.

如果我注册并单击Registrate-Button,它将自动推送到MainViewController.如果我按下Logout-Button,它会关闭到RegistrationViewController,这是因为我使用[self dismissModalViewController animated：YES].

- (IBAction)logoutPressed:(id)sender {
  [self dismissModalViewControllerAnimated:YES];
   }

如果我按下Logout-Button,我如何解除对LoginViewController的关注.

解决方法

您可以使用UINavigationController方法-popToRootViewControllerAnimated：.

- (IBAction)logoutPressed:(id)sender {
    [self.navigationController popToRootViewControllerAnimated:YES];
}

如果您正在谈论一个在另一个上面呈现的几个模态视图,您可以通过将-dismissViewControllerAnimated：completion：或者old -dismissModalViewControllerAnimated：发送到堆栈中的最低层来解除所有这些视图,如文档中所述：

If you present several view controllers in succession,thus building a stack of presented view controllers,calling this method on a view controller lower in the stack dismisses its immediate child view controller and all view controllers above that child on the stack. When this happens,only the top-most view is dismissed in an animated fashion

（编辑：李大同）

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