iOS WKWebView的使用

一、导入依赖库

WebKit

二、创建WebView

//1.创建配置项
WKWebViewConfiguration*configuration = [[WKWebViewConfigurationalloc]init];
//1.1设置偏好
configuration.preferences= [[WKPreferencesalloc]init];
configuration.preferences.minimumFontSize= 10;
configuration.preferences.javaScriptEnabled= YES;
//默认是不能通过JS自动打开字典的，必须通过用户交互才能打开
configuration.preferences.javaScriptCanOpenWindowsAutomatically= NO;

//1.2设置内容交互配置
configuration.userContentController= [[WKUserContentControlleralloc]init];
//1.2.1添加一个JS到Html中，这样就可以直接在JS调用我们添加的JS方法
WKUserScript*script = [[WKUserScriptalloc]initWithSource:@"function showAlert()"injectionTime:WKUserScriptInjectionTimeAtDocumentStartforMainFrameOnly:YES];
[configuration.userContentControlleraddUserScript:script];

//2.创建WKWebView
WKWebView*browse = [[WKWebViewalloc]initWithFrame:self.view.frameconfiguration:configuration];
//2.1设置代理
browse.navigationDelegate= self;
browse.UIDelegate= self;
//2.2设置需要加载的链接
NSString*urlStr =@"";
[browse loadHTMLString:urlStrbaseURL:nil];

[self.viewaddSubview:browse];

/*
 *  goBack      后退
 *  goForward   前进
 *  监听通知：loading、title、estimatedProgress动能对应为：是否正在加载中、页面的标题、页面内容加载进度

 */

三、实现代理

#pragma mark - WKUIDelegate
#pragma mark HTML中的alert
- (void)webView:(WKWebView*)webView runJavaScriptAlertPanelWithMessage:(NSString*)message initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(void))completionHandler
{
    completionHandler();
}

#pragma mark HTML中的confirm
- (void)webView:(WKWebView*)webView runJavaScriptConfirmPanelWithMessage:(NSString*)message initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(BOOL))completionHandler
{
    completionHandler(YES);
}

#pragma mark HTML中的prompt
- (void)webView:(WKWebView*)webView runJavaScriptTextInputPanelWithPrompt:(NSString*)prompt defaultText:(NSString*)defaultText initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(NSString* _Nullable))completionHandler
{
    completionHandler(@"success");
}

#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController*)userContentController didReceiveScriptMessage:(WKScriptMessage*)message
{
    //在js端通过window.webkit.messageHandlers.{InjectedName}.postMessage()方法来发送消息到native，通过这个代理可以接收到消息并做相应的处理。
}

#pragma mark - WKNavigationDelegate
#pragma mark 是否允许跳转导航，如果不允许可以手动跳转[[UIApplication sharedApplication] openURL:@""];
- (void)webView:(WKWebView*)webView decidePolicyForNavigationAction:(WKNavigationAction*)navigationAction decisionHandler:(void(^)(WKNavigationActionPolicy))decisionHandler
{
    decisionHandler(WKNavigationActionPolicyAllow);
}

#pragma mark开始加载页面
- (void)webView:(WKWebView*)webView didStartProvisionalNavigation:(WKNavigation*)navigation
{

}

#pragma mark决定是否允许导航响应，如果不允许就不会跳转到链接的页面
- (void)webView:(WKWebView*)webView decidePolicyForNavigationResponse:(WKNavigationResponse*)navigationResponse decisionHandler:(void(^)(WKNavigationResponsePolicy))decisionHandler
{
    decisionHandler(WKNavigationResponsePolicyAllow);
}

#pragma mark内容开始返回
- (void)webView:(WKWebView*)webView didCommitNavigation:(WKNavigation*)navigation
{
   
}

#pragma mark加载完成
- (void)webView:(WKWebView*)webView didFinishNavigation:(WKNavigation*)navigation
{

}

#pragma mark加载失败
- (void)webView:(WKWebView*)webView didFailNavigation:(WKNavigation*)navigation withError:(NSError*)error
{


}

#pragma mark如果我们需要处理在重定向时，需要实现下面的代理方法就可以接收到
- (void)webView:(WKWebView*)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation*)navigation
{

}

#pragma mark如果我们的请求要求授权、证书等，我们需要处理下面的代理方法，以提供相应的授权处理等
- (void)webView:(WKWebView*)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge*)challenge completionHandler:(void(^)(NSURLSessionAuthChallengeDisposition,NSURLCredential * _Nullable))completionHandler
{
    NSURLCredential *credential = [[NSURLCredentialalloc]init];
    completionHandler(NSURLSessionAuthChallengeUseCredential,credential);
}

#pragma mark当我们终止页面加载时，我们会可以处理下面的代理方法，如果不需要处理，则不用实现之
- (void)webViewWebContentProcessDidTerminate:(WKWebView*)webView
{

}