wx.invoke("shareToExternalMoments", {
      text: {
            content:"村上春树测试",    // 文本内容
      },
      attachments: [
            {
                  msgtype: "image",    // 消息类型，必填
                  image: {
                        mediaid: "3UC02HAox2HUhNdqfXANF2BlW1xOalfGkuvpc-jRwHmIfyIEYx_7WhPlhCerAlxNi"
                  },
            }
      ]},function(res) {
        if (res.err_msg == "shareToExternalMoments:ok") {
        }
    }
);