miniwx/app.js

// app.js
App({
  onLaunch() {
    if (!wx.cloud) {
      console.error('请使用 2.2.3 或以上的基础库以使用云能力')
    } else {
      wx.cloud.init({
        traceUser: true
      })
    }



    // 自动静默登录：wx.login 获取 code，再请求后端接口换取 openid
    this.silentLogin()
  },

  silentLogin() {
    wx.login({
      success: (loginRes) => {
        if (loginRes.code) {
          this.loginWithCode(loginRes.code)
        } else {
          console.error('wx.login 失败', loginRes.errMsg)
          this.globalData.isLoggedIn = false
          this.globalData.loginFailed = true
          if (this.loginReadyCallback) {
            this.loginReadyCallback(null)
          }
        }
      },
      fail: (err) => {
        console.error('wx.login 调用失败', err)
        this.globalData.isLoggedIn = false
        this.globalData.loginFailed = true
        if (this.loginReadyCallback) {
          this.loginReadyCallback(null)
        }
      }
    })
  },

  loginWithCode(code) {
    wx.request({
      url: 'https://xcx.yun.588580.xyz/api/wx-mini/login',
      method: 'GET',
      data: { code },
      success: (res) => {
        const result = res.data
        if (result && result.code === 0 && result.data) {
          const openid = result.data.openid
          const userInfo = {
            openid,
            sessionKey: result.data.session_key,
            unionid: result.data.unionid || ''
          }

          this.globalData.userInfo = userInfo
          this.globalData.isLoggedIn = true
          wx.setStorageSync('userInfo', userInfo)

          if (this.loginReadyCallback) {
            this.loginReadyCallback(userInfo)
          }
        } else {
          console.error('后端登录失败', result)
          this.globalData.isLoggedIn = false
          this.globalData.loginFailed = true
          if (this.loginReadyCallback) {
            this.loginReadyCallback(null)
          }
        }
      },
      fail: (err) => {
        console.error('请求后端登录接口失败', err)
        this.globalData.isLoggedIn = false
        this.globalData.loginFailed = true
        if (this.loginReadyCallback) {
          this.loginReadyCallback(null)
        }
      }
    })
  },

  globalData: {
    userInfo: null,
    isLoggedIn: false,
    loginFailed: false
  }
})