ios:如何关闭模态视图控制器，然后弹出一个推入的视图控制器

问题描述：

我有一个视图控制器B，它由根视图控制器A推送到导航堆栈上，并且如果其模型处于特定状态，则该视图控制器B需要显示替代视图，因此它会模态呈现另一个视图控制器C.当我关闭视图控制器CI时，如果导航控制器B也位于导航堆栈中，则它也要弹出视图控制器B.我希望这样做的方式是只有1个过渡.

I have a view controller B that is pushed onto the navigation stack by root view controller A and this view controller B needs to display an alternative view if its model is in a certain state so it is modally presenting another view controller C. When I dismiss view controller C I would also like to pop view controller B if that is also on the nav stack. I would like to do it in such a way that there is only 1 transition.

有什么想法吗?

答

在您发布的场景中，视图控制器C的呈现视图控制器实际上将是导航控制器，因此您可以要求它弹出B，然后解雇自己.这段代码在视图控制器C中:

In the scenario you posted, the presenting view controller for view controller C will actually be the navigation controller, so you can ask it to pop off B, and then dismiss yourself. This code is in view controller C:

-(IBAction)goBackToA:(id)sender {
    [(UINavigationController *)self.presentingViewController  popViewControllerAnimated:NO];
    [self dismissViewControllerAnimated:YES completion:nil];
}

如果使用情节提要，则可以执行相同的操作，并以轻松的步调直接跳回A.

If you are using a storyboard, you can do this same thing, jumping directly back to A with an unwind segue.

ios:如何关闭模态视图控制器，然后弹出一个推入的视图控制器

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