这段内容要放到</body>结束 ！！放在head都不行。。。。唉

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
wx.config({
debug: true,
appId: ‘wx260619ea73a4b130‘, // 必填，公众号的唯一标识
timestamp: {{$wechat[‘timestamp‘]}}, // 必填，生成签名的时间戳
nonceStr: "{{$wechat[‘noncestr‘]}}", // 必填，生成签名的随机串
signature: "{{$wechat[‘signature‘]}}",// 必填，签名，见附录1
jsApiList: [‘onMenuShareTimeline‘]
});

wx.ready(function () {
var shareData = http://www.mamicode.com/{
title: ‘这里是分享标题‘,
desc: ‘这里是发送给好友的时候的简介‘,
link: ‘http://baidu.com‘,
imgUrl: ‘http://baidu.com/logo.jpg‘
};
wx.onMenuShareAppMessage(shareData);

});

wx.error(function (res) {
alert(res.errMsg);
});
</script>

微信接口各种坑 - 朋友圈分享定制