UIViewController *vc = self.presentingViewController;
? ? while (vc.presentingViewController) {
? ? vc = vc.presentingViewController;
? ? }
? ? [vc.presentedViewController dismissViewControllerAnimated:YES completion:NULL];
當(dāng)然返回第三級(jí)頁(yè)面就是[vc.presentedViewController.presentedViewController dismissViewControllerAnimated:YES completion:NULL];