weapp_group/pages/login/login.js

// pages/login/login.js
import { loginByWeChat, updateUserInfo } from '../../api/user'
import { navigateTo, showModal, showLoading, hideLoading, setStorageSync,getStorageSync, navigateBack, reLaunch, showToast } from '../../utils/util'

Page({
  /**
   * 页面的初始数据
   */
  data: {
    canIUse: wx.canIUse('button.open-type.getPhoneNumber'),
    showAuth: false
  },
  pageData: {
    wxCode: ''
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {
    this.getWXCode()
  },
  // 获取登录code
  getWXCode: function () {
    wx.login({
      success: (res) => {
        this.pageData.wxCode = res.code
      }
    })
  },
  
  // 手机号登录
  tapPhoneLoginAction: function() {
    navigateTo('/pages/loginMobeil/loginMobeil')
  },
  // 授权手机号
  getPhoneNumber: function(e) {
    const { encryptedData, iv } = e.detail
    if (!encryptedData || !iv) {
      this.tapPhoneLoginAction()
      return false
    }
    showLoading({
      title: '登录中...'
    })
    const { wxCode } = this.pageData
    this.wxLogin(wxCode,encryptedData, iv)
    
  },
  // 授权用户信息 --> 登录
  onGotUserInfo: function(e) {
    let { encryptedData, iv, rawData, signature } = e.detail
    if (iv && iv.length && signature && signature.length && encryptedData && encryptedData.length) {
      try {
        rawData = JSON.parse(rawData)
      } catch (error) {
        rawData = rawData
      }
      const params = {
        signature,
        encryptedData,
        iv,
        userName:rawData.nickName,
        avatar:rawData.avatarUrl
      }
      updateUserInfo(params).then((result)=>{
        if (result && result.code == 0) {
          let userInfo = getStorageSync('USERINFO')
          userInfo = Object.assign({},userInfo,result.data)
          setStorageSync('USERINFO', userInfo)
          // 获取用户信心成功返回
          this.redirect()
        } else {
          this.tapPhoneLoginAction()
        }
      })
    } else {
      this.tapPhoneLoginAction()
    }
    this.setData({
      showAuth: false
    })
  },
  // 登录
  wxLogin: function(code, encryptedData, iv) {
    const params = {
      code,
      encryptedData,
      iv
    }
    loginByWeChat(params).then((result) => {
      hideLoading()
      const data = result.data
      if (data && data.userInfo && data.userInfo.token) {
        setStorageSync('USERINFO', data.userInfo)
        if(parseInt(data.newUser) == 1) {  // 1为新用户、0为旧用户,去拿用户信息
          this.setData({
            showAuth: true
          })
        } else {
          // 登录成功返回
          this.redirect()
        }
        
      } else {
        this.tapPhoneLoginAction()
      }
    }).catch((err) => {
      hideLoading()
      showModal({
        title: '提示',
        content: err.msg,
        showCancel: false
      })
      this.tapPhoneLoginAction()
    })
  },
  // 登录成功返回
  redirect: function() {
    // 在内存中的所有页面栈对象
    const pages = getCurrentPages()
    if (pages.length > 1) {
      // 上个页面
      const prePage = pages[pages.length - 2]
      // 页面的登录回调
      if (prePage && prePage.loginCallback) {
        prePage.loginCallback()
      }
      navigateBack()
    } else {
      reLaunch('/pages/index/index')
    }
  },
  // 取消登录
  handleNotLoginClick: function() {
    const pages = getCurrentPages() /*在内存中的所有页面栈对象*/
    if (pages.length > 2) {
      navigateBack()
    } else {
      reLaunch('/pages/index/index')
    }
  }
})