UIResponder Extension -- To get any type of responder if exists in hierarchy

extension UIResponder {

func chainedResponderOf<T: Any>(type responderClassType: T) -> UIResponder? {

    guard let classType = responderClassType as? AnyClass else { return nil }
    var responder: UIResponder? = self.next

    while responder != nil {
        if responder!.isKind(of: classType) {
            return responder!
        responder = responder!.next
    return nil


Hi Fahid,

I expect this is a suggestion for an extension on UIKit for the Swift Interface? If so, unfortunately UIKit is out of scope for our modification. That said, it may be a good suggestion for Feedback Assistant that Apple could include for UIKit, and could also be useful for others using Swift anyway in their own codebase!


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As a matter of interest, this might be a cleaner implementation?

extension UIResponder {

    func chainedResponder<T: UIResponder>(of responderType: T.Type) -> T? {

        return sequence(first: self, next: { $0.next })
                       .dropFirst()    // Drop the first one as it will be self
                       .first(where: { $0 is T }) as? T

Thanks @Rod_Brown

What is the way to suggest Apple to add this in UIKit?

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