uiwebview获取水疗中心(单页应用程序)网站的当前URL

Question

我想在浏览水疗中心（单页应用）网站时获得我的UIWebView的当前位置。
^{（是的，我故意使用UIWebView而不是WKWebView。）}

我知道有多种获取当前URL的方法，例如：

webView.request?.url?.absoluteString
webView.request?.mainDocumentURL?.absoluteString
webView.stringByEvaluatingJavaScript(from: "window.location")

但是，对于一个水疗网站，对于上述方法，即使我在该水疗网站上的另一个页面导航，我也会获得初始URL。

我该怎么办？

Answer 1

步骤1：创建一个自定义URLProtocol以捕获数据请求

class CustomURLProtocol: URLProtocol, URLSessionDataDelegate, URLSessionTaskDelegate {
    // If this returns false, the first request will basically stops at where it begins.
    override class func canInit(with request: URLRequest) -> Bool {
        return true
    }
    override class func canonicalRequest(for request: URLRequest) -> URLRequest {
        return request
    }
    override func startLoading() {
        print(self.request.url) // URL of Data requests made by UIWebView before loading.  
        URLSession(configuration: URLSessionConfiguration.default, delegate: self, delegateQueue: nil).dataTask(with: self.request).resume()
    }
    override func stopLoading() {
    }
    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: @escaping (URLSession.ResponseDisposition) -> Void) {
        // Data request responses received.  
        self.client?.urlProtocol(self, didReceive: response, cacheStoragePolicy: .allowed)
        completionHandler(.allow)
    }
    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
        // Data request data received.
        self.client?.urlProtocol(self, didLoad: data)
        self.urlSession(session, task: dataTask, didCompleteWithError: nil)
    }
    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
        if let error = error {
            self.client?.urlProtocol(self, didFailWithError: error)
            return
        }
        print(self.request.url) // URL of Data requests completed.
        self.client?.urlProtocolDidFinishLoading(self)
    }
}

步骤2：注册您的自定义URLProtocol

在将水疗中心加载到UIWebView之前，请注册您的自定义URLProtocol。

URLProtocol.registerClass(CustomURLProtocol.self)

希望这会有所帮助！对不起，延迟了，被工作陷入困境。