微信分享给好友

手机微信里，分享给好友时，在当前页面指定分享的URL和图片

function share_scene(link, scene_type){
    var extargs = "";
    if (tid != ""){//gdt traceid
        extargs = "tid=" + tid + "&aid=" + 54;//share must be 54
    }
    var queryStr = link.split('?')[1] || '';
        queryStr = queryStr.split('#')[0];
    if( queryStr == '' ){
        return;
    }
    
    var queryarr = [queryStr, 'scene='+scene_type];
    (extargs != "") && (queryarr.push(extargs));
    queryStr = queryarr.join('&');

    return link.split('?')[0] + '?' + queryStr + '#' + (link.split('#')[1]||'');
}


function  onBridgeReady(){
 // 发送给好友; 
    //安卓分享时会调用此函数
    WeixinJSBridge.on('menu:share:appmessage', function(argv){
                WeixinJSBridge.invoke('sendAppMessage',{
                                      "appid"      : appId,
                                      "img_url"    : imgUrl,
                                      "img_width"  : "640",
                                      "img_height" : "640",
                                      "link"       : share_scene(link, 1),
                                      "desc"       : desc,
                                      "title"      : title
                }, function(res) {
 
                });
    });
    

    // 新的接口
    //苹果分享时会调用此函数
    WeixinJSBridge.on('menu:general:share', function(argv){
        var scene = 0;
        switch(argv.shareTo){
            case 'friend'  : scene = 1; break;
            case 'timeline': scene = 2; break;
            case 'weibo'   : scene = 3; break;
        }

            argv.generalShare({
                                "appid"      : appId,
                                "img_url"    : imgUrl,
                                "img_width"  : "640",
                                "img_height" : "640",
                                "link"       : share_scene(link,scene),
                                "desc"       : desc,
                                "title"      : title
            }, function(res){

            });
    });


}


 if (typeof WeixinJSBridge == "undefined"){
         if( document.addEventListener ){
             document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
         }else if (document.attachEvent){
             document.attachEvent('WeixinJSBridgeReady', onBridgeReady); 
             document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
         }
     }else{
         onBridgeReady();
     }