Finding the rootViewController in iOS

Question

In ShareKit, the code needs to determine where the rootViewController is so it can show a modal view. For some reason, the code is failing in iOS 5:

    // Try t         


        

Answer 1

I'm not sure if you can rely on window.rootViewController b/c you don't have to set it. You can just add a subview to the window. The following seemed to work fine:

id rootVC = [[[[[UIApplication sharedApplication] keyWindow] subviews] objectAtIndex:0] nextResponder];

Answer 2

Swift way to do it, you can call this from anywhere:

/// EZSwiftExtensions - Gives you the VC on top so you can easily push your popups
public var topMostVC: UIViewController? {
    var presentedVC = UIApplication.sharedApplication().keyWindow?.rootViewController
    while let pVC = presentedVC?.presentedViewController {
        presentedVC = pVC
    }

    if presentedVC == nil {
        print("EZSwiftExtensions Error: You don't have any views set. You may be calling them in viewDidLoad. Try viewDidAppear instead.")
    }
    return presentedVC
}

Its included as a standard function in:

https://github.com/goktugyil/EZSwiftExtensions

Answer 3

This worked for me:

UIViewController * rootViewController = (UIViewController *)[[[UIApplication.sharedApplication.keyWindow subviews] firstObject];