iOS-来自另一个呈现的ViewController的呈现ViewController

Question

I have 3 view controllers, A , B and C . B is presented on A . What I need is to present C on A when a button clicked on B and dismiss B . But I am unable to do so. Is there some workaround. Thanks for help.

Answer 1

click the button on B, in iOS5,

UIViewController *presentingVC = self.presentingViewController;
[self dismissViewControllerAnimated:YES completion:^{
      [presentingVC presentViewController:vc3 animated:YES completion:nil];
}];

Answer 2

当您单击B上的按钮时，弹出B本身并使用NSNotificationCenter向A发出通知，使A按下C。

Answer 3

如果您不想设置委托，只需通过B内部的presentingViewController属性获取A，则调用所需的A方法，在该方法中首先关闭模态控制器，然后显示C。