===== 小程序分享 =====

    <button open-type="share">分享给好友</button>
    
    onLoad: function() {
        wx.showShareMenu({
            withShareTicket: true //要求小程序返回分享目标信息，此处一点要预先执行，不然分享拿不到shareTicket
        })
    }
    
    onShareAppMessage: function(res) {
        console.info("我进来了");
        // if (res.from === 'menu') { // 判断分享触发的位置
        return {
            title: '知识大陆',
            path: '/pages/index/index', //点击进来的页面
            imageUrl: "../../source/images/share.jpg",
            success: function(res) {
                console.info("转发成功", res);
                wx.getShareInfo({
                    shareTicket: res.shareTickets[0],
                    success: (res) => {
                        console.log('已成功获取到加密信息', res);
                    },
                    fail: (res) => {
                        console.log(res);
                    }
                });
            },
            fail: function(res) {
                console.info("转发失败", res);
            }
        }
        // } else {
        //     console.info("异常转发。失败");
        // }
    }