Get visibleViewController using UIWindow? [duplicate]

You should check out this answer. The gist of it is that you start with the window's .rootViewController. In my own code (using a UINavigationController as the .rootViewController, I use this (in AppDelegate):

if let nvc = self.window?.rootViewController as? UINavigationController { if let mvc = nvc.topViewController as? MasterViewController { // ... do something } else if let dvc = nvc.topViewController as? DetailViewController { // ... do something } } 

Note that if you are using the default template for a Master-Detail application, you will need to consider the SplitViewController which interposes itself, but that should be reasonably obvious from the boilerplate code.

If you add the child view controller:

let viewControllersVisible = self.rootViewController?.childViewControllers.filter({ $0.isVisible && $0.view.window }) 

This returns an array of UIViewControllers added in your view hierarchy, it doesn't say if the user is actually able to see those view controllers, depends on your hierarchy.

if you present modally just a view controller:

let viewControllerVisible = self.rootViewController?.presentedViewController 

Inorder to get a reference to the top most view controller in the hierarchy try the following code

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

If you want the topmost view on window try with this you will get the view.

[[[[UIApplication sharedApplication] keyWindow] subviews] lastObject];