在首页判断是否登陆并执行登录

首页先判断是否登陆

index.wxml

<!-- 判断是否登陆 -->
<modal class="modal" hidden="{{is_login}}" no-cancel bindconfirm="close" confirmText=" ">
  <view class="dew">
    <image src='/images/login.png' />
    <button class='bottom' type='primary' open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo">
      请您受权登陆，不然没法正常操做
    </button>
  </view>
</modal>

index.js

var api = require('../../api.js');

var app = getApp();

Page({
 
  /**
   * 页面的初始数据
   */
  data: {
    //判断小程序的API，回调，参数，组件等是否在当前版本可用。
    canIUse: wx.canIUse('button.open-type.getUserInfo'),
    is_login:true
  },
  
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {// 查看是否受权
    wx.getSetting({
      success: function (res) {
        if (!res.authSetting['scope.userInfo']) {
          that.setData({
            is_login: false
          })
        }
      }
    })
  },
  //执行登录
  bindGetUserInfo: function (e) {
    if (e.detail.userInfo) {
      //用户按了容许受权按钮
      var that = this;
      //插入登陆的用户的相关信息到数据库
      var openid = getApp().globalData.openid;
      getApp().globalData.userInfo = e.detail.userInfo;
      // console.log(getApp().globalData.userInfo)
      wx.request({
        url: api.wx.UserLogin,
        data: {
          userinfo: e.detail.userInfo,
          openid: openid
        },
        header: {
          'content-type': 'application/json' // 默认值
        },
        method: 'post',
        success(res) {
          if (res.data.result == 1) {
            wx.switchTab({
              url: '/pages/index/index'
            })
            that.setData({
              is_login: true
            })
          } else {
            console.log("写入失败")
          }
        }
      })
      //受权成功后，跳转进入小程序首页
    } else {
      //用户按了拒绝按钮
      wx.showModal({
        title: '警告',
        content: '您点击了拒绝受权，将没法进入小程序，请受权以后再进入!!!',
        showCancel: false,
        confirmText: '返回受权',
        success: function (res) {
          if (res.confirm) {
            console.log('用户点击了“返回受权”')
          }
        }
      })
    }
  },
 
})

app.js

 onLaunch: function () {
    var that = this;
    wx.login({
      success: res => {
        wx.request({
          url: api.wx.jsCode + '?jsCode=' + res.code,
          data: {
          },
          success: res => {
             var obj = {};
             obj.openid = res.data.openid;
             ...
             wx.setStorageSync('user', obj); //存储openid 
          }
        })
      }
    });
 
  },    

 

获取用户手机号：

index.wxml

<modal class="modal" hidden="{{is_login}}" no-cancel bindconfirm="close" confirmText=" ">
      <view class="dew">
        <image src='/images/login.png' />
        <button class='bottom' type='primary' open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber">
        请您受权登陆，不然没法正常操做
        </button>
      </view>
</modal>

index.js

 /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    var that = this;
    ...

    //是否登陆
    if (!fzuser){
      that.setData({
        is_login: false
      })
    }
 },

//获取用户手机号
  getPhoneNumber: function (e) {
    var that = this;
    console.log(e)
    if (e.detail.errMsg == 'getPhoneNumber:fail user deny' || e.detail.encryptedData == null || e.detail.iv == null) {
      wx.showModal({
        title: '提示',
        showCancel: false,
        content: '未受权,您不能使用服务!',
        success: function (res) {
          console.log(res)
        }
      })
    } else {
      ...
      wx.request({
        url:api.wx.UserLogin,
        data: {
          encryptedData: e.detail.encryptedData,
          sessionKey: user.session_key,
          iv: e.detail.iv,
          openid: openid,
          version: api.wx.version,
        },
        method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT      
        success: function (res) {
          console.log(res);
          ...
          that.setData({
            is_login: true
          })

        }
      });
    }

  },

/**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {   
    var that = this;
    ...
    //验证登陆是否过时
    wx.checkSession({
      success() {
        // session_key 未过时，而且在本生命周期一直有效
        console.log('登陆未过时')
      },
      fail() {
        // session_key 已经失效，须要从新执行登陆流程
        // wx.login() // 从新登陆
        that.setData({
          is_login: false
        })
      }
    })
  },