ios - 使用 SWRevealViewController 时获取顶部 UIViewController

Question

我的项目使用SWRevealViewController带有标签栏 Controller 。我使用下面的代码来获取可见的 View Controller :

- (UIViewController*) topMostController
{
    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;
    }
}

但是当我站在 MessageViewController ，或其他任何我总是得到 SWRevealViewController为顶部。请纠正我在这种情况下获取可见 View Controller 的正确方法。

Answer 1

使用带有标签栏的 SWRevealController 时检查层次结构并相应地导航。

它在导航 Controller 中的 SWRevealController->tabbarcontroller->navigationcontroller->lastobject。如有不同相应调整。例如，提供了具有此层次结构的代码。

(UIViewController*) visibleViewControllerWhenUsingSWRevealController  {

    if ([swRevealController.frontViewController isKindOfClass:[UITabBarController class]]) {

        UITabBarController *tabBarController = (UITabBarController *)mainRevealController.frontViewController;

        if ([tabBarController.selectedViewController isKindOfClass:[UINavigationController class]]) {
             UINavigationController *navigationController = tabBarController.selectedViewController;
             return ( [[navigationController viewControllers] lastObject]) ;
        }
    }  

    return nil;
}