可以试试这样:
- (UIViewController*)topViewController { return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController]; } - (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController { if ([rootViewController isKindOfClass:[UITabBarController class]]) { UITabBarController* tabBarController = (UITabBarController*)rootViewController; return [self topViewControllerWithRootViewController:tabBarController.selectedViewController]; } else if ([rootViewController isKindOfClass:[UINavigationController class]]) { UINavigationController* navigationController = (UINavigationController*)rootViewController; return [self topViewControllerWithRootViewController:navigationController.visibleViewController]; } else if (rootViewController.presentedViewController) { UIViewController* presentedViewController = rootViewController.presentedViewController; return [self topViewControllerWithRootViewController:presentedViewController]; } else { return rootViewController; } }