WKWebView の URL のリンクをクリックした時に外部のブラウザを起動

WKWebView2Safari.swift

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate {
    var webView: WKWebView!

    override func loadView() {
        webView = WKWebView()
        webView.navigationDelegate = self
        view = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        
        if let url = URL(string: "https://www.example.com") {
            webView.load(URLRequest(url: url))
        }
    }

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        if let url = navigationAction.request.url, navigationAction.navigationType == .linkActivated, UIApplication.shared.canOpenURL(url) {
            UIApplication.shared.open(url)
            decisionHandler(.cancel)
        } else {
            decisionHandler(.allow)
        }
    }
}