How to find topmost view controller on iOS

I think you need a combination of the accepted answer and @fishstix's

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

Swift 3.0+

func topMostController() -> UIViewController? {    guard let window = UIApplication.shared.keyWindow, let rootViewController = window.rootViewController else {        return nil    }    var topController = rootViewController    while let newTopController = topController.presentedViewController {        topController = newTopController    }    return topController}

To complete JonasG's answer (who left out tab bar controllers while traversing), here is my version of returning the currently visible view controller:

- (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;    }}

iOS 4 introduced the rootViewController property on UIWindow:

[UIApplication sharedApplication].keyWindow.rootViewController;

You'll need to set it yourself after you create the view controller though.