WKWebView open links from certain domain in safari

You can implement WKNavigationDelegate, add the decidePolicyForNavigationAction method and check there the navigationType and requested url. I have used google.com below but you can just change it to your domain:

Xcode 8.3 • Swift 3.1 or later

import UIKitimport WebKitclass ViewController: UIViewController, WKNavigationDelegate {    let webView = WKWebView()    override func viewDidLoad() {        super.viewDidLoad()        webView.frame = view.bounds        webView.navigationDelegate = self        let url = URL(string: "https://www.google.com")!        let urlRequest = URLRequest(url: url)        webView.load(urlRequest)        webView.autoresizingMask = [.flexibleWidth,.flexibleHeight]        view.addSubview(webView)    }    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {        if navigationAction.navigationType == .linkActivated  {            if let url = navigationAction.request.url,                let host = url.host, !host.hasPrefix("www.google.com"),                UIApplication.shared.canOpenURL(url) {                UIApplication.shared.open(url)                print(url)                print("Redirected to browser. No need to open it locally")                decisionHandler(.cancel)            } else {                print("Open it locally")                decisionHandler(.allow)            }        } else {            print("not a user click")            decisionHandler(.allow)        }    }}

Here is sample code from the response to the swift written in obj c.

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(nonnull WKNavigationAction *)navigationAction decisionHandler:(nonnull void (^)(WKNavigationActionPolicy))decisionHandler{    if (navigationAction.navigationType == WKNavigationTypeLinkActivated) {        if (navigationAction.request.URL) {            NSLog(@"%@", navigationAction.request.URL.host);            if (![navigationAction.request.URL.resourceSpecifier containsString:@"ex path"]) {                 if ([[UIApplication sharedApplication] canOpenURL:navigationAction.request.URL]) {                    [[UIApplication sharedApplication] openURL:navigationAction.request.URL];                    decisionHandler(WKNavigationActionPolicyCancel);                }            } else {                decisionHandler(WKNavigationActionPolicyAllow);            }        }    } else {        decisionHandler(WKNavigationActionPolicyAllow);    }}

For Swift 3.0

import UIKitimport WebKitclass ViewController: UIViewController, WKNavigationDelegate {    let wv = WKWebView(frame: UIScreen.main.bounds)    override func viewDidLoad() {        super.viewDidLoad()        guard let url =  NSURL(string: "https://www.google.com") else { return }        wv.navigationDelegate = self        wv.load(NSURLRequest(url: url as URL) as URLRequest)        view.addSubview(wv)    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()    }    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {        if navigationAction.navigationType == .LinkActivated  {            if let newURL = navigationAction.request.url,                let host = newURL.host , !host.hasPrefix("www.google.com") &&                UIApplication.shared.canOpenURL(newURL) &&                UIApplication.shared.openURL(newURL) {                    print(newURL)                    print("Redirected to browser. No need to open it locally")                    decisionHandler(.cancel)            } else {                print("Open it locally")                decisionHandler(.allow)            }        } else {            print("not a user click")            decisionHandler(.allow)        }    }}