一个小程序的首页对接后端实现用户注册

//index.js
//获取应用实例
const app = getApp()

Page({
  globalData: {
    appid: 'wx4abc8f71681a89e0',//appid需自己提供
    secret: '5bf1b1597b219f8a6d77eab59314b885',//secret需自己提供，此处的
  },

  data: {
    motto: '技术带来改变',
    userInfo: {},
    openid: '',
    hasUserInfo: false,
    canIUse: wx.canIUse('button.open-type.getUserInfo')
  },
  //事件处理函数
  bindViewTap: function() {
    wx.switchTab({
      url: '../task/task'
    })
  },

   
 
  onLoad: function() {
    if (app.globalData.userInfo) {
      this.setData({
        userInfo: app.globalData.userInfo,
        hasUserInfo: true
      });
       
    } else if (this.data.canIUse) {
      // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
      // 所以此处加入 callback 以防止这种情况
      app.userInfoReadyCallback = res => {
        this.setData({
          userInfo: res.userInfo,
          hasUserInfo: true
        })
        
      }
      this.LoadUserSub(); //获取openid 并且注册
      
    } else {
    
      // 在没有 open-type=getUserInfo 版本的兼容处理
      wx.getUserInfo({
        success: res => {
          app.globalData.userInfo = res.userInfo
          this.setData({
            userInfo: res.userInfo,
            hasUserInfo: true
          })
        }
      });
    }
  },



  getUserInfo: function(e) {
    app.globalData.userInfo = e.detail.userInfo
    wx.setStorageSync('userInfo', e.detail.userInfo);//存储userInfo
    this.setData({
      userInfo: e.detail.userInfo,
      hasUserInfo: true
    })
    this.register();//注册
  },
  LoadUserSub: function () {
    var that = this;
    var user = wx.getStorageSync('user') || {};
    var userInfo = wx.getStorageSync('userInfo') || {};
    if ((!user.openid || (user.expires_in || Date.now()) < (Date.now() + 600)) && (!userInfo.nickName)) {
      wx.login({
        success: function (res) {
          if (res.code) {
            
            var d = that.globalData;//这里存储了appid、secret、token串  
            var l = 'https://api.weixin.qq.com/sns/jscode2session?appid=' + d.appid + '&secret=' + d.secret + '&js_code=' + res.code + '&grant_type=authorization_code';
            wx.request({
              url: l,
              data: {},
              method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, 
              success: function (res) {
                var obj = {};
                obj.openid = res.data.openid;
                obj.expires_in = Date.now() + res.data.expires_in;
                wx.setStorageSync('user', obj);//存储openid  
                that.setData({
                  openid: res.data.openid,
                  hasUser: true
                })
              }
            });
          } else {
            console.log('获取用户登录态失败！' + res.errMsg)
          }
        }
      });
    }

    
   


  },

  register:function()
  {
    var user = wx.getStorageSync('user') || {};
    var userInfo = wx.getStorageSync('userInfo') || {};
    var l = 'http://123.com/index.php/Home/Wechat/register';//这里的域名改下
    if (user.openid && userInfo.nickName) {
      wx.request({
        url: l,
        data: {
          openid: user.openid,
          nickName: userInfo.nickName,
          avatarUrl: userInfo.avatarUrl,
          gender: userInfo.gender,
          province: userInfo.province,
          city: userInfo.city,
          country: userInfo.country
        },
        method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, 
        success: function (res) {
          var userid = 0;
          wx.setStorageSync('userid', res.data);//存储userid
        }
      });
    }   
  }

})