禁止长按WKWebView出现菜单

    // 禁止选择CSS
    NSString *css = @"body{-webkit-user-select:none;-webkit-user-drag:none;}";
    
    // CSS选中样式取消
    NSMutableString *javascript = [NSMutableString string];
    [javascript appendString:@"var style = document.createElement('style');"];
    [javascript appendString:@"style.type = 'text/css';"];
    [javascript appendFormat:@"var cssContent = document.createTextNode('%@');", css];
    [javascript appendString:@"style.appendChild(cssContent);"];
    [javascript appendString:@"document.body.appendChild(style);"];
    
    // javascript注入
    WKUserScript *noneSelectScript = [[WKUserScript alloc] initWithSource:javascript injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
    WKUserContentController *userContentController = [[WKUserContentController alloc] init];
    [userContentController addUserScript:noneSelectScript];
    WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
    configuration.userContentController = userContentController;
    
    
    
    CGRect frame = CGRectMake(0, 0, kScreenWidth, kScreenHeight - 44.f -20.f);

    WKWebView *webView = [[WKWebView alloc] initWithFrame:frame configuration:configuration];
    
    NSURLRequest* request = [NSURLRequest requestWithURL:_brandInfoURL];
    
    [webView loadRequest:request];
    
    _webView = webView;
    
    [self.view addSubview:webView];