场景:A(ViewController)-->B(ViewController)-->C(ViewController)
此时,想要在C中直接回到A:
[self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil];
场景:A(ViewController)-->B(ViewController)-->C(ViewController)
[self.presentingViewController.presentingViewController dismissViewControllerAnimated:YES completion:nil];