WKWebView에서 history back 처리

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네이티브에서 직접 처리할 경우 canGoBack, webView.goBack 함수를 직접 호출하면 되지만 웹에서 뒤로가기를 할 경우 네이티브에 다음과 같이 선언하여 처리하도록 한다.

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        
        guard let url = navigationAction.request.url else {
            decisionHandler(.cancel)
            return
        }
        
        if(navigationAction.navigationType == .backForward) {
            if navigationAction.request.url != nil {
                if webView.canGoBack {
                    print ("Can go back")
                    webView.goBack()
                    //webView.reload()
                    decisionHandler(.cancel)
                    return
                } else {
                    print ( "Can't go back")
                }
            }
        }
        
        // 생략 ~
}

 

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