is WKCompositingView blocking touches?

Question

I have a WKWebView that I would like to handle touches but I just can't find the right method.

webView is created programmatically in viewDidLoad, and loads fine.

override func viewDidLoad() {
    super.viewDidLoad()
    let site = "http://google.com"
    let url = URL(string: site)
    let request = URLRequest(url: url!)
    webView = WKWebView(frame: self.view.frame)
    webView.navigationDelegate = self
    webView.uiDelegate = self // is this necessary for UITouch recognition?
    webView.load(request)
    self.view.addSubview(webView)
}

I've tried adding UITapGestureRecognizer in viewDidLoad... (per UIWebView and touch event)

override func viewDidLoad() {
    //...
    let taprecognizer = UITapGestureRecognizer(target: self, action: #selector(tapLocation))
    taprecognizer.numberOfTapsRequired = 1
    taprecognizer.delegate = self
    webView.addGestureRecognizer(taprecognizer)
}

func tapLocation(recognizer: UITapGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    print("tapped")
    return true
}

I've also tried getting touch from...

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    print("tapped")
}

My Debug View Hierarchy shows a bunch of WKCompositingViews which makes me think that these are using the touches before they can arrive to WKWebView or View.

I've added UIViewController, UIWebViewDelegate, WKNavigationDelegate, WKUIDelegate, UIGestureRecognizerDelegate to class...but it just won't go through.

Answer 1

Here is a sample working code in which i added WKWebView into main view and i am able to detect WKWebView touch event using UIGestureRecognizerDelegate

Swift4

    //
    //  WebViewVC.swift
    //
    //  Created by Test user on 01/02/18.
    //  Copyright © 2018 Test user. All rights reserved.
    //

    import UIKit
    import WebKit

    class WebViewVC: UIViewController,WKUIDelegate,UIGestureRecognizerDelegate {

        var webView : WKWebView!

        override func viewDidLoad() {
            super.viewDidLoad()
            let site = "http://google.com"
            let url = URL(string: site)
            let request = URLRequest(url: url!)
            webView = WKWebView(frame: self.view.frame)
            webView.uiDelegate = self // is this necessary for UITouch recognition?
            webView.load(request)
            self.view.addSubview(webView)

            let taprecognizer = UITapGestureRecognizer(target: self, action: #selector(tapLocation))
            taprecognizer.numberOfTapsRequired = 1
            taprecognizer.numberOfTouchesRequired = 1
            taprecognizer.delegate = self
            webView.addGestureRecognizer(taprecognizer)
        }

        @objc func tapLocation(recognizer: UITapGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
            print("tapped")
            return true
        }

        func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
            print("Tap event will detect here.")
            return true
        }

    }