WKWebView---WKScriptMessageHandler

- (void)addScriptMessageHandler:(id )scriptMessageHandler name:(NSString *)name;

//WKWebView initial
WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:_webView];
NSString *path = [[NSBundle mainBundle] pathForResource:@"WebView" ofType:@"html"];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]];
[webView loadRequest:request];

//- (void)addScriptMessageHandler:(id )scriptMessageHandler name:(NSString *)name;
//name表示添加的js方法名
[webView.configuration.userContentController addScriptMessageHandler:self name:@"openCamera"];
[webView.configuration.userContentController addScriptMessageHandler:self name:@"playVideo"];

window.webkit.messageHandlers.注册的方法名.postMessage(parameters);

    
    
    


    openCamera
    playVideo

WKScriptMessageHandler这个协议的代理方法

js通过messageHandlers调用方法，传递参数。在这个代理里，都可以获取到。

- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
    if ([message.name isEqualToString:@"openCamera"]) {
        NSLog(@"%@ -- %@", message.name, message.body);//openCamera -- 
    }else if([message.name isEqualToString:@"playVideo"]) {
        NSLog(@"%@ -- %@", message.name, message.body);//playVideo -- {Author = "Jhon Trank";name = God;}
    }
}