# 1. 封装接口

//在根目录下创建http文件，里面新建一个js文件，CV进去
module.exports=(url,method,data,token=true)=>{
  return new Promise((resolve,reject)=>{
    wx.request({
      url,url,
      method:method,
      data:Object.assign({},data),
      header:token?{"Content-Type": "application/text"}:{"content-type":"application/x-www-form-urlencoded"},
      success(res){
        resolve(res)
      },
      fail(err){
        reject(err)
      }
    })
  })
}

# 2. 如下操作

//举例
function logines(code){
  return fetch.http('URL','post',{code: code,type: 2},false)
}
function delet(token){
  return fetch.http(`URL?token=${token}`)
}

1 2	//必须设置open-type,bindgetuserinfo,这些是固定的，不能改 <van-button type="default" size='small' bindgetuserinfo="getUserInfo" open-type="getUserInfo">立即登录</van-button>

// pages/user/user.js
let app = getApp()
Page({
  /**
   * 页面的初始数据
   */
  data: {
    show: true,
    list: []
  },
  qin(){
    wx.clearStorage()
    wx.reLaunch({
      url: '/pages/wd/wd',
    })
  },
  getUserInfo(e) {
    //判断是确定还是取消
    if(!e.detail.userInfo){
      wx.showToast({
        title: '已取消',
        icon:'nane'
      })
      return false
    }
    //登录
    let _that=this
    wx.login({
      success(req) {
            app.http.logines(req.code).then(res => {
              wx.setStorageSync('token', res.data.data.token)
              _that.login()
            })
          }
        })
  },
  login(){
    app.http.delet(wx.getStorageSync('token')).then(res => {
      if(res.data.code==2000){
        this.setData({
          show:true
        })
      }else{
        this.setData({
          list:res.data.data.base,
          show:false
        })
      }
    })
  },
  onLoad: function () {
    if(wx.getStorageSync('token')){
      this.login()
      this.setData({
        show:false
      })
    }else{
      this.setData({
        show:true
      })
    }
  },
  tuei(){
    app.http.onlogin(wx.getStorageSync('token')).then(res=>{
      if(res.code==0){
        thiswx.removeStorageSync('token')
        this.setData({
          show:true
        })
      }
    })
    wx.reLaunch({
      url: '/pages/wd/wd',
    })
  }
})

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