Get to UIViewController from UIView?

Question

Is there a built-in way to get from a UIView to its UIViewController? I know you can get from UIViewController to its UIView

Answer 1

It's surely a bad idea and a wrong design, but I'm sure we can all enjoy a Swift solution of the best answer proposed by @Phil_M:

static func firstAvailableUIViewController(fromResponder responder: UIResponder) -> UIViewController? {
    func traverseResponderChainForUIViewController(responder: UIResponder) -> UIViewController? {
        if let nextResponder = responder.nextResponder() {
            if let nextResp = nextResponder as? UIViewController {
                return nextResp
            } else {
                return traverseResponderChainForUIViewController(nextResponder)
            }
        }
        return nil
    }

    return traverseResponderChainForUIViewController(responder)
}

If your intention is to do simple things, as showing a modal dialog or tracking data, that doesn't justify the use of a protocol. I personally store this function in an utility object, you can use it from anything that implement the UIResponder protocol as:

if let viewController = MyUtilityClass.firstAvailableUIViewController(self) {}

All credit to @Phil_M