Get top most UIViewController

Question

I can't seem to get the top most UIViewController without access to a UINavigationController. Here is what I have so far:

UIApplication.sharedApplication().keyWindow?.rootViewController?.presentViewController(vc, animated: true, completion: nil)

However, it does not seem to do anything. The keyWindow and rootViewController seem to be non-nil values too, so the optional chaining shouldn't be an issue.

NOTE: It is a bad idea to do something like this. It breaks the MVC pattern.

Answer 1

Use this code to find top most UIViewController

func getTopViewController() -> UIViewController? {
    var topController: UIViewController? = UIApplication.shared.keyWindow?.rootViewController
    while topController?.presentedViewController != nil {
        topController = topController?.presentedViewController
    }
    return topController
}