objective-c - iOS 开发中 WKWebView 的使用问题拦截跳转

问题描述

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler { 请问这里的 webView.URL 和 navigationAction.request.URL 有什么区别？ }- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {请问这里的 webView.URL 和 navigationAction.request.URL 有什么区别？}

问题：1.上面代码块里面的问题 webView.URL 和 navigationAction.request.URL 有什么区别？2.当我第一次加载一个网页的时候，上面的代理方法为什么会被调用多次？3.如果我想拦截网页的跳转链接，希望通过 push 打开一个页面重新展示一个 webview，最好是在哪个代理方法里拦截？ 遇到重定向问题怎么破？

问题解答

调多次 是不是因为url有重定向

你可以打印出来看看他们的值，看看跳转网页的时候是在哪里打印的。文档里有关于这两个代理的说明。

/*! @abstract Decides whether to allow or cancel a navigation. @param webView The web view invoking the delegate method. @param navigationAction Descriptive information about the action triggering the navigation request. @param decisionHandler The decision handler to call to allow or cancel the navigation. The argument is one of the constants of the enumerated type WKNavigationActionPolicy. @discussion If you do not implement this method, the web view will load the request or, if appropriate, forward it to another application. */- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;/*! @abstract Decides whether to allow or cancel a navigation after its response is known. @param webView The web view invoking the delegate method. @param navigationResponse Descriptive information about the navigation response. @param decisionHandler The decision handler to call to allow or cancel the navigation. The argument is one of the constants of the enumerated type WKNavigationResponsePolicy. @discussion If you do not implement this method, the web view will allow the response, if the web view can show it. */- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;