[SWIFT] How to monitor SPA site transitions with WKWebView

Overview

I'm building a page like SPA and want to monitor the URL, but the delegate isn't called and I can't detect it

Solution

Monitor the url property of WKWebView with KVO.

class ViewController: UIViewController{
    var webView: WKWebView
    private var _observers = [NSKeyValueObservation]()
    //Omission
    override func viewDidLoad(){
        _observers.append(webview.observe(\.url, options: .new) { _, _ in
            print("URL: \(self.webView.url)")
        })
    }
}

https://stackoverflow.com/questions/47829963/how-can-i-detect-when-url-of-amp-page-changed-with-wkwebview/48273950

https://qiita.com/ObuchiYuki/items/d00ce5f44725672184da

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