微信小程序实现人脸识别登陆的示例代码

<!-- camera.wxml相机大小需要从重新设置 -->
<camera
 device-position="front"
 flash="off"
 binderror="error"
 style="width: 100%; height: 400px;"
></camera>

<!-- 需要使用 button 来授权登录 -->
<button
 wx:if="{{canIUse}}"
 open-type="getUserInfo"
 bindgetuserinfo="bindGetUserInfo"
 type="primary"
>
 授权
</button>
<view wx:else>请升级微信版本</view>

<!-- 拍照按钮 -->
<button type="primary" bindtap="takePhoto"> 拍照 </button>

<button bindtap='btnreg'> 注册须知 </button>

// camera.js
const app = getApp()
Page({
 data: {
  canIUse: wx.canIUse('button.open-type.getUserInfo'),
  nickName : "",
  src : "",//图片的链接
  token: "",
  base64: "",
  msg:""
 },

 //拍照
 takePhoto() {
  var that = this;
  //拍照
  const ctx = wx.createCameraContext()
  ctx.takePhoto({
   quality: 'high',
   success: (res) => {
    this.setData({
     src: res.tempImagePath//获取图片
    })

    //图片base64编码
    wx.getFileSystemManager().readFile({
     filePath: this.data.src, //选择图片返回的相对路径
     encoding: 'base64', //编码格式
     success: res => { //成功的回调
      this.setData({
       base64: res.data
      })
     }
    })
   }//拍照成功结束

  })//调用相机结束

   //acess_token获取,qs:需要多次尝试
   wx.request({
    url: 'https://aip.baidubce.com/oauth/2.0/token', //是真实的接口地址
    data: {
     grant_type: 'client_credentials',
     client_id: '**********************',//用你创建的应用的API Key
     client_secret: '************************'//用你创建的应用的Secret Key
    },
    header: {
     'Content-Type': 'application/json' // 默认值
    },
    success(res) {
     that.setData({
      token: res.data.access_token//获取到token
     })
    }
   })
   
   //上传人脸进行注册-----test
   wx.request({
    url: 'https://aip.baidubce.com/rest/2.0/face/v3/faceset/user/add?access_token=' + this.data.token,
    method: 'POST',
    data: {
     image: this.data.base64,
     image_type: 'BASE64',
     group_id: '********',//自己建的用户组id
     user_id: this.data.nickName//这里获取用户昵称
    },
    header: {
     'Content-Type': 'application/json' // 默认值
    },
    success(res) {
     that.setData({
      msg: res.data.error_msg
     })
     console.log(that.data.msg)
     //做成功判断
     if (that.data.msg == 'SUCCESS') {//微信js字符串请使用单引号
      wx.showToast({
       title: '注册成功',
       icon: 'success',
       duration: 2000
      })
      wx.switchTab({
       url: '../UI/ui',
      })

     }

    }
   }),
   
   //失败尝试
   wx.showToast({
    title: '请重试',
    icon: 'loading',
    duration: 500
   })
 },
 error(e) {
  console.log(e.detail)
 },

//获取用户信息
 bindGetUserInfo: function(e){
  this.setData({
   nickName: e.detail.userInfo.nickName
  })
  wx.showToast({
   title: '授权成功',
   icon: 'success',
   duration: 1000
  })
 },

//先授权登陆，再拍照注册
 btnreg:function(){
  wx.showModal({
   title: '注册须知',
   content: '先授权登陆，再拍照注册哦！网络可能故障，如果不成功，请再试一下！',
  })
 }

})

<!-- camera.wxml -->
<camera
 device-position="front"
 flash="off"
 binderror="error"
 style="width: 100%; height: 300px;"
></camera>
<button type="primary" bindtap="takePhoto">拍照</button>
<view>预览</view>
<image mode="widthFix" src="{{src}}"></image>

// camera.js
Page({
 data: {
  base64: "",
  token: "",
  msg: null
 },
 //拍照并编码
 takePhoto() {
  //拍照
  const ctx = wx.createCameraContext()
  ctx.takePhoto({
   quality: 'high',
   success: (res) => {
    this.setData({
     src: res.tempImagePath
    })
   }
  })

  var that = this;
  //图片base64编码
  wx.getFileSystemManager().readFile({
   filePath: this.data.src, //选择图片返回的相对路径
   encoding: 'base64', //编码格式
   success: res => { //成功的回调
    that.setData({
     base64: res.data
    })
   }
  })

  //acess_token获取
  wx.request({
   url: 'https://aip.baidubce.com/oauth/2.0/token', //真实的接口地址
   data: {
    grant_type: 'client_credentials',
    client_id: '**************************',
    client_secret: '*******************************'//用自己的
   },
   header: {
    'Content-Type': 'application/json' // 默认值
   },
   success(res) {
    that.setData({
     token: res.data.access_token//获取到token
    })
   }
  })

  //上传人脸进行 比对
  wx.request({
   url: 'https://aip.baidubce.com/rest/2.0/face/v3/search?access_token=' + that.data.token,
   method: 'POST',
   data: {
    image: this.data.base64,
    image_type: 'BASE64',
    group_id_list: '********'//自己建的用户组id
   },
   header: {
    'Content-Type': 'application/json' // 默认值
   },
   success(res) {
    that.setData({
     msg: res.data.result.user_list[0].score
    })
    if(that.data.msg > 80){
     wx.showToast({
      title: '验证通过',
      icon: 'success',
      duration: 1000
     })
     //验证通过，跳转至UI页面
     wx.switchTab({
      url: '../UI/ui',
     })
    }
   }
  });

  wx.showToast({
   title: '请重试',
   icon: 'loading',
   duration: 500
  })
 },
 error(e) {
  console.log(e.detail)
 }
})