# 获取用户信息

## 1.获取openid

```
// 登录
wx.login({
  success: ({ code }) => {
    // 发送 res.code 到后台换取 openId, sessionKey, unionId
    console.log(code, 'res.code')
    wx.request({
      url: 'https://api.weixin.qq.com/sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code',
      data: {
        appid: appid,
        secret: secret,
        js_code: code,
        grant_type: 'authorization_code'
      },
      success: ({ data }) => {
        console.log(data, '小程序的openid')
        this.globalData.openid = data.openid
      }
    })
  }
})
```

## 2.获取用户信息

```
wx.getSetting({
  success: res => {
    if (res.authSetting['scope.userInfo']) {
      // 已经授权，可以直接调用 getUserInfo 获取头像昵称，不会弹框
      wx.getUserInfo({
        success: res => {
          console.log(res.userInfo, 'res.userInfo')
          // 可以将 res 发送给后台解码出 unionId
          this.globalData.userInfo = res.userInfo
          // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
          // 所以此处加入 callback 以防止这种情况
          if (this.userInfoReadyCallback) {
            this.userInfoReadyCallback(res)
          }
        }
      })
    } else {
      wx.authorize({
        scope: 'scope.userInfo',
        success: () => {
          wx.getUserInfo({
            success: res => {
              console.log(res.userInfo, '弹框确认获取到的用户信息res.userInfo')
              // 可以将 res 发送给后台解码出 unionId
              this.globalData.userInfo = res.userInfo
              // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回
              // 所以此处加入 callback 以防止这种情况
              if (this.userInfoReadyCallback) {
                this.userInfoReadyCallback(res)
              }
            }
          })
        }
      })
    }
  }
})
```


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