get top visible view controller in objective c iOS

Question

I am implementing this method but it always returns me rootviewcontroller, not current visible controller how can I find out a visible controller. I also follow this link. iPhone -- How to find topmost view controller. but the same problem yet.

    + (UIViewController *)visibleViewController:(UIViewController *)rootViewController
{
    if (rootViewController.presentedViewController == nil)
    {
        return rootViewController;
    }
    if ([rootViewController.presentedViewController isKindOfClass:[UINavigationController class]])
    {
        UINavigationController *navigationController = (UINavigationController *)rootViewController.presentedViewController;
        UIViewController *lastViewController = [[navigationController viewControllers] lastObject];

        return [self visibleViewController:lastViewController];
    }
    if ([rootViewController.presentedViewController isKindOfClass:[UITabBarController class]])
    {
        UITabBarController *tabBarController = (UITabBarController *)rootViewController.presentedViewController;
        UIViewController *selectedViewController = tabBarController.selectedViewController;

        return [self visibleViewController:selectedViewController];
    }

    UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController;

    return [self visibleViewController:presentedViewController];
}

score 0 · Answer 1 · answered Jan 03 '18 at 12:33

0

I think the issue is with your function.May be your root view controller is not correct. Try to implement the following function and see if it is working for you:

+ (UIViewController*) topMostController
{
    UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;

    while (topController.presentedViewController) {
        topController = topController.presentedViewController;
    }

    return topController;
}

answered Jan 03 '18 at 12:33

User511

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it return me rootview controller – Shahbaz Akram Jan 03 '18 at 12:50
it always return me slideNavigationController which is rootviewcontroller. not my currentviewcontroller – Shahbaz Akram Jan 03 '18 at 12:52
Strange!! Can you please show me your storyboard. how you are connecting it then how you are presenting the top view? – User511 Jan 03 '18 at 13:17

score 0 · Answer 2 · answered Jan 03 '18 at 12:39

Objecive C

+ (UIViewController*) topMostController { // top most ViewController
    UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;

    while (topController.presentedViewController) {
        topController = topController.presentedViewController;
    }

    return topController;
}

Swift3.0

extension UIApplication {
  func topMostViewController() -> UIViewController? { // top most ViewController
    return self.keyWindow?.rootViewController?.topMostViewController()
   }
}

// Find top most ViewController in Appdelegate
let topController = UIApplication.shared.topMostViewController()

it return me rootview controller – Shahbaz Akram Jan 03 '18 at 12:50 — Shahbaz Akram, Jan 03 '18 at 12:50
Go to next ViewController and check it – Kathiresan Murugan Jan 03 '18 at 12:58 — Kathiresan Murugan, Jan 03 '18 at 12:58

score 0 · Answer 3 · answered Jan 03 '18 at 14:21

I think your logic isn't quite right. Try:

+(UIViewController*)topMostController
{
    return [[self class] visibleControllerForController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

+(UIViewController*)visibleControllerForController:(UIViewController*)controller
{
    // Determine last controller in navigation stack
    UIViewController *topViewController = controller;
    if ([controller isKindOfClass:[UITabBarController class]]) {
        topViewController = ((UITabBarController*)controller).selectedViewController;
    }
    if ([controller isKindOfClass:[UINavigationController class]]) {
        topViewController = ((UINavigationController*)controller).topViewController;
    } else if (controller.navigationController) {
        topViewController = controller.navigationController.topViewController;
    }

    // If last controller is presenting a modal recurse - find the last controller in that navigation stack
    UIViewController *presentedViewController = topViewController.presentedViewController;
    if (presentedViewController && ! presentedViewController.isBeingDismissed) {
        return [[self class] visibleControllerForController:presentedViewController];
    }

    return topViewController;
}

score 0 · Accepted Answer · answered Jan 04 '18 at 05:35

Finally i resolve this issue by adding more code. like this...

UINavigationController *vc = SharedAppDelegate.navigationController;
    NSLog(@"%@",vc.viewControllers);
    UIViewController* controller = vc.viewControllers.firstObject;
    NSLog(@"%@",controller.childViewControllers);
    UIViewController* carbonContr = controller.childViewControllers.firstObject;

get top visible view controller in objective c iOS

4 Answers4