看过很多资料，上面说微信分享的时候是获取页面的标题和最前的图；其实试验过几次并不是这样的，所以上网查到的方法！
其实就是用一个JS实现在分享的时候修改页面上的图标和标题；
好了，不多说了，直接上代码！
var dataForWeixin={
appId:"xxxxxxxxx",
MsgImg:"转发时的图片",
TLImg:"图片",
url:"自定义链接",
title:"自定义标题",
desc:"自定义描述",
fakeid:"",
callback:function(
//这里是分享成功后的回调功能
){}
};
(function(){
var onBridgeReady=function(){
//发送给朋友
WeixinJSBridge.on('menu:share:appmessage', function(argv){
WeixinJSBridge.invoke('sendAppMessage',{
"appid":dataForWeixin.appId,
"img_url":dataForWeixin.MsgImg,
"img_width":"120",
"img_height":"120",
"link":dataForWeixin.url,
"desc":dataForWeixin.desc,
"title":dataForWeixin.title
}, function(res){(dataForWeixin.callback)();});
});
//发送到朋友圈
WeixinJSBridge.on('menu:share:timeline', function(argv){
WeixinJSBridge.invoke('shareTimeline',{
"img_url":dataForWeixin.TLImg,
"img_width":"120",
"img_height":"120",
"link":dataForWeixin.url,
"desc":dataForWeixin.desc,
"title":dataForWeixin.title
}, function(res){(dataForWeixin.callback)();});});
//分享到微博
WeixinJSBridge.on('menu:share:weibo', function(argv){
WeixinJSBridge.invoke('shareWeibo',{
"content":dataForWeixin.title,
"url":dataForWeixin.url
}, function(res){(dataForWeixin.callback)();});
});
//分享到facebook
WeixinJSBridge.on('menu:share:facebook', function(argv){
(dataForWeixin.callback)();
WeixinJSBridge.invoke('shareFB',{
"img_url":dataForWeixin.TLImg,
"img_width":"120",
"img_height":"120",
"link":dataForWeixin.url,
"desc":dataForWeixin.desc,
"title":dataForWeixin.title
}, function(res){});
});
};
if(document.addEventListener){
document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
}else if(document.attachEvent){
document.attachEvent('WeixinJSBridgeReady' , onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady' , onBridgeReady);
}
})();