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js页面

Page({

  data: {

    is_login:false,

    nickname:'',

    img:'',

    token:''

  },

   

  onLoad: function() {

    this.login

  }, 

 login(){

  var _this = this;

  var token= wx.getStorageSync('token')

   if (token!='') {

      wx.navigateTo({

        url: "/pages/login/login",

      })

      return false

   }

   

    wx.getUserProfile({ 

      desc: 'desc',

      success:(res)=>{

          var nickname=res.userInfo.nickName;

          var img=res.userInfo.avatarUrl;

          wx.login({

           success:function(e){

             var code=e.code

             var url = "http://www.duan.com/index.php/admin/Login/login.html" //后台地址

             wx.request({  

               url: url,  

               data:{nickname,img,code},

               header:{"content-type":"application/x-www-form-urlencoded"},

               success:function(e){

                 if (e.data.code==0) {

                   var token=e.data.data

                   wx.setStorageSync('token', token) //存到缓存中

                   wx.setStorageSync('nickname', nickname)

                   wx.setStorageSync('img', img)

                   _this.setData({

                     is_login:true,

                     nickname:nickname,

                     img:img,

      

                   })

                 }

               }

               

             })

           }

          })

      },

      fail:(e)=>{

        wx.showToast({

          title: '授权失败',

        })

      }

    })

 }

    

},

 )

 

 

wxml 页面

<view class='headView'>

        <view class='headImageView'>

            <image class='headImage' src='{{img}}' mode='scaleToFill'></image>

          </view> 

        

        <!-- <view class='contentText'>{{img}}</view> -->

</view>

<button open-type="getUserInfo" bindtap="login">授权登录</button>

 

 

 

 

 

 

 

 

判断是否登录过

js 页面代码

// pages/login/login.js

Page({

  /**

   * 页面的初始数据

   */

  data: {

 is_login:false,

    nickname:'',

    img:'',

    token:'',

    arr:''

  },

  login(){

    var _this = this;

    var token= wx.getStorageSync('token')

     if (token!='') {

        wx.navigateTo({

          url: "/pages/logs/logs",

        })

        return false

     }

     

      wx.getUserProfile({ 

        desc: 'desc',

        success:(res)=>{

            var nickname=res.userInfo.nickName;

            var img=res.userInfo.avatarUrl;

            wx.login({

             success:function(e){

               var code=e.code;

              

               var url = "http://www.duan.com/index.php/admin/Login/login.html"

               wx.request({  

                 url: url,  

                 data:{nickname,img,code},

                 header:{"content-type":"application/x-www-form-urlencoded"},

                 success:function(e){

                   if (e.data.code==0) {

                     var token=e.data.data

                     wx.setStorageSync('token', token)

                     

                     wx.setStorageSync('nickname', nickname)

                     wx.setStorageSync('img', img)

                     _this.setData({

                       is_login:true,

                       nickname:nickname,

                       img:img,

        

                     })

                   }

                 }

                 

               })

             }

            })

        },

        fail:(e)=>{

          wx.showToast({

            title: '授权失败',

          })

        }

      })

   },

  /**

   * 生命周期函数--监听页面加载

   */

  onLoad: function (options) {

    var _this=this

    wx.request({

      url: "http://www.duan.com/index.php/admin/Login/show.html",

      success:function(a){

        console.log(a.data.data)

        _this.setData({

          arr:a.data.data

        })

      }

    })

  },

  /**

   * 生命周期函数--监听页面初次渲染完成

   */

  onReady: function () {

  },

  /**

   * 生命周期函数--监听页面显示

   */

  onShow: function () {

  },

  /**

   * 生命周期函数--监听页面隐藏

   */

  onHide: function () {

  },

  /**

   * 生命周期函数--监听页面卸载

   */

  onUnload: function () {

  },

  /**

   * 页面相关事件处理函数--监听用户下拉动作

   */

  onPullDownRefresh: function () {

  },

  /**

   * 页面上拉触底事件的处理函数

   */

  onReachBottom: function () {

  },

  /**

   * 用户点击右上角分享

   */

  onShareAppMessage: function () {

  }

})

 

wxml页面代码

  <text wx:for="{{arr}}">名称：{{item.name}}价格：{{item.price}}数量：{{item.stock}}</text>

<button open-type="getUserInfo" bindtap="login">加入购物车</button>

 

 php 后台 

<?php

namespace app\admin\controller;

use think\Controller;
use think\Db;
use think\Request;

class Login extends Controller
{
    /*
     * 调用curl
     *
     *
     * */
    function geturl($url){
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);
        $output = json_decode($output,true);
        return $output;
    }


    /*
     * 登录验证
     *
     *
     * */
    public function login(){
        $data=input();
        $code=input('code');
        $appid="wxdbe715a7b8ec9e57";
        $secret="2f9a0c0d1ebe3361ce27e5404d4a361a";
        $url="https://api.weixin.qq.com/sns/jscode2session?appid=".$appid."&secret=".$secret."&js_code=".$code."&grant_type=authorization_code";
        $res=$this->geturl($url);
//        var_dump($res);
        $arr=[
            'nickname'=>$data['nickname'],
            'img'=>$data['img'],
            'session_key'=>$res['session_key'],
            'code'=>$data['code'],
            'openid'=>$res['openid'],
        ];
        $str=Db::table('weixin')->where('openid',$arr['openid'])->find();
        if ($str){
            Db::table('weixin')->where('openid',$arr['openid'])->update(['session_key'=>$arr['session_key']]);
            return json(['code'=>0,'msg'=>'授权成功','data'=>$str['openid']]);
        }else{
            Db::table('weixin')->insert($arr);
            return json(['code'=>0,'msg'=>'授权成功','data'=>$str['openid']]);
        }
    }
    /*
     * 商品列表
     *
     * */
    public function show(){
        $data=Db::table('goods')->select();
        return json(['code'=>0,'data'=>$data,'msg'=>'ok']);
    }

}