微信分享到朋友圈需要设置图片链接标题描述，同理分享到微博一样的js，需要预加载这些js<script>        var imgUrl = ‘‘;//图片地址        var lineLink = ‘‘;//链接地址        var shareTitle = ‘‘;//分享标题        var descContent = "";//描述内容        var appid = ‘‘;        function shareFriend() {            WeixinJSBridge.invoke(‘sendAppMessage‘,{                "appid": appid,                "img_url": imgUrl,                "img_width": "640",                "img_height": "640",                "link": lineLink,                "desc": descContent,                "title": shareTitle            }, function(res) {                _report(‘send_msg‘, res.err_msg);            })        }        function shareTimeline() {            WeixinJSBridge.invoke(‘shareTimeline‘,{                "img_url": imgUrl,                "img_width": "640",                "img_height": "640",                "link": lineLink,                "desc": descContent,                "title": shareTitle            }, function(res) {                _report(‘timeline‘, res.err_msg);            });        }        function shareWeibo() {            WeixinJSBridge.invoke(‘shareWeibo‘,{                "content": descContent,                "url": lineLink            }, function(res) {                _report(‘weibo‘, res.err_msg);            });        }        // 当微信内置浏览器完成内部初始化后会触发WeixinJSBridgeReady事件。        document.addEventListener(‘WeixinJSBridgeReady‘, function onBridgeReady() {// 发送给好友            WeixinJSBridge.on(‘menu:share:appmessage‘, function(argv){                shareFriend();            });// 分享到朋友圈            WeixinJSBridge.on(‘menu:share:timeline‘, function(argv){                shareTimeline();            });// 分享到微博            WeixinJSBridge.on(‘menu:share:weibo‘, function(argv){                shareWeibo();            });        }, false);    </script>