欢迎使用Markdown编辑器写博客

本Markdown编辑器使用[StackEdit][6]修改而来，用它写博客，将会带来全新的体验哦：

• 使用WKwebVIew，创建这个对象，代码如下

• ** WKUserScript *script = [[WKUserScript alloc]initWithSource:@”” injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];

  WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc]init];
  [config.userContentController addUserScript:script];

  WKWebView *web = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) configuration:config];
  web.backgroundColor = [UIColor yellowColor];
  web.navigationDelegate = self;
  web.UIDelegate = self;
  self.webView = web;
  [self.view addSubview:web];

  NSString *filrStr = [[NSBundle mainBundle] pathForResource:@”js” ofType:@”html”];
  NSURL *url = [NSURL fileURLWithPath:filrStr];
  [web loadFileURL:url allowingReadAccessToURL:url];
  [[web configuration].userContentController addScriptMessageHandler:self name:@”jsCallOC”];**
  在网页加载完成后调用这个回调函数，并在里面注入JS代码
  /* 网页加载完成 /
  -(void)webView:(WKWebView )webView didFinishNavigation:(WKNavigation )navigation{
  // NSString *butValueJS = @”document.getElementById(‘buttonJS’).innerText”;

  NSString *butValueJS =
  @”var button = document.getElementById(‘buttonJS’);button.onclick=function getImages(){window.webkit.messageHandlers.jsCallOC.postMessage({body: ‘goodsId=1212’});}”;

  [webView evaluateJavaScript:butValueJS completionHandler:^(id _Nullable response, NSError * _Nullable error) {
  }];
  }

• 下面是截图
• 

• 
  /* 接收JS中方法执行事件。 /
  -(void)userContentController:(WKUserContentController )userContentController didReceiveScriptMessage:(WKScriptMessage )message{
  NSLog(@”message.body == %@”,message.name);

  [self JCtoOC:message];
  }
  -(void)JCtoOC:(id)body{
  NSLog(@”js调用我的..”);
  }
  最后在这里接收JS执行的事件