iOS webView的加载时序
UIWebView加载顺序：
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
NSLog(@"开始请求webview:%@",request.URL.relativeString);
return YES;
}
- (void)webViewDidStartLoad:(UIWebView *)webView {
NSLog(@"开始加载webview");
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSLog(@"结束加载webview");
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(nonnull NSError *)error {
NSLog(@"webView加载失败");
}
加载的结果：
2017-04-27 08:53:00.535 H5页面调试[1273:150877] 开始请求webview:http://www.easck.com/p>
-----------------显示开始加载html CSS js 和图片资源等（JS引擎单线程顺序执行）---------------
2017-04-27 08:53:01.069 H5页面调试[1273:150877] 结束加载webview
WKWebView加载时序:
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSLog(@"webview开始请求");
decisionHandler(WKNavigationActionPolicyAllow);
}
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
NSLog(@"webView开始加载");
}
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
NSLog(@"webview开始收到响应");
decisionHandler(WKNavigationResponsePolicyAllow);
}
-----------------显示开始加载html CSS js 和图片资源等（JS引擎单线程顺序执行）---------------
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
NSLog(@"1");
}
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
NSLog(@"webview结束加载内容");
}
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error{
NSLog(@"webview加载失败");
}
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{
NSLog(@"开始重定向的函数");
}
- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *))completionHandler
{
NSLog(@"2");
completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil);
}
iOS webView加载html5缓存
1.加载html5的过程
每次加载一个HTML5页面，都会有较多的请求。除了HTML主URL自身的请求外，HTML外部引用的JS、CSS、字体文件、图片都是一个独立的HTTP请求，每一个请求都串行的（可能有连接复用）。
