小程序获取用户的信息

 <!--获取用户的信息-->
wx.getSetting({
      success(res) {
        if (!res.authSetting['scope.userInfo']) {
          wx.authorize({
            scope: 'scope.userInfo',
            success(res) {
               
            }
          })
        }
      }
    })
 <!--把数据返回给后台并获取open_id-->
    wx.login({
      success: function (res) {
        // 获取openID;
       var openId = res.code;
        
        var that = this;
          wx.getUserInfo({
            withCredentials: true,
            success: function (res) {
              var send_data = md5.hexMD5({ act: 'get_user_info_or_log', headimgurl: res.userInfo.avatarUrl, open_id: openId, nickName:res.userInfo.nickName});
              wx.request({
                //后台接口地址
                url: "https://xcx.baidu.com",
                data: send_data,
                method: 'POST',
                header: {
                  'content-type': 'application/x-www-form-urlencoded'
                },
                success: function (res) {
                  wx.setStorageSync('user_id', res.data.user_id);
                }
              })
            },
          })
        },
<!--把user_id储存在本地-->

       user_id:function(){

            // 获取本地的user_id

               var user_id = wx.getStorageSync('user_id');

               console.log(user_id);

},

    })