iPhone – 解雇RootViewController？

概述我有一个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Regi 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

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