iOS 擷取當前頂層的ViewController

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iOS 擷取當前頂層的ViewController

#pragma mark - topVC- (UIViewController *)theTopviewControler {    UIViewController *resultVC;    resultVC = [self _topViewController:[[UIApplication sharedApplication].keyWindow rootViewController]];    while (resultVC.presentedViewController) {        resultVC = [self _topViewController:resultVC.presentedViewController];    }    return resultVC;}- (UIViewController *)_topViewController:(UIViewController *)vc {    if ([vc isKindOfClass:[UINavigationController class]]) {        return [self _topViewController:[(UINavigationController *)vc topViewController]];    } else if ([vc isKindOfClass:[UITabBarController class]]) {        return [self _topViewController:[(UITabBarController *)vc selectedViewController]];    } else {        return vc;    }    return nil;}

 

使用方法

UIViewController *topmostVC = [self topViewController];

 

iOS 擷取當前頂層的ViewController