前端成长指引详情可以查看我的csdn相关文章 小程序(授权)获取当前位置
问题：人脸采集的时候，首次授权拒绝之后，不再弹出授权提示 解决方案：调用 wx.openSetting二次授权 问题： 调用wx.openSetting二次授权成功之后，返回之后camera组件还是失败状态 重新打开后才能用 解决方案：在camera的用户不允许使用摄像头时触发的事件binderror里面销毁camera组件
Tip:目前人脸采集有很多种方案，可以接微信自己的也可以使用第三方的，我们对接的是Aibee
效果如下： 
点击上传的时候，调用Aibee的接口，进行对比，如果采集的人脸的信息和库里已有的信息匹配则采集成功，否则采集失败
贴上代码：
javascript
<!--pages/camera/camera.wxml-->
<view class="camera_wrap">
<!-- 图像部分 -->
<view class="camera_box">
<camera device-position="front" flash="auto" binderror="error" bindstop="stopImg" style="width:100%; height: 100%;" wx:if="{{!flagSrc&&isAuth}}"></camera>
<!-- 拍照成功时显示 -->
<image mode="widthFix" wx:if="{{flagSrc}}" src="{{src}}" style="width:100%; height: 100%;"></image>
</view>
<!-- 尾部 -->
<view class="footer_box">
<view class="pic_box" wx:if="{{!flagSrc}}">
<button bindtap="takePicture" class="take_btn">
<image src="/images/camera/camera.png"></image>
</button>
<view class="font_f">拍照上传</view>
</view>
<view class="pic_box" wx:if="{{flagSrc}}">
<button bindtap="uploadImg" class="take_btn">
<image src="/images/camera/up.png"></image>
</button>
<view class="font_f">确认上传</view>
</view>
<view class="re_pic" wx:if="{{flagSrc}}">
<button bindtap="reTakePhoto" class="re_btn">
<image src="/images/camera/reload.png"></image>
</button>
<view class="font_gr">重新拍摄</view>
</view>
</view>
</view>javascript
var utils = require('../../utils/httpUtil.js');
// camera.js
const app = getApp()
Page({
data: {
// canIUse: wx.canIUse('button.open-type.getUserInfo'),
nickName: "",
src: "",//图片的链接
token: "",
base64Src: "",
msg: "",
type: 0,//0注册 1更新
flagSrc: false,//是否拍照成功，显示预览 true预览，false 拍照
isAuth:false,//是否授权
},
onLoad: function (options) {
console.log(options)
},
onShow: function () {
let that = this;
if (this.options.type == "register") {
this.setData({
type: 0
})
} else {
this.setData({
type: 1
})
}
// // 获取用户的授权信息
wx.getSetting({
success: (res) => {
console.log(res)
if (res.authSetting['scope.camera'] == false) {
// 未授权，提示去授权
that.setData({
isAuth:false
})
}else{
this.setData({
isAuth:true
})
}
}
})
},
getAibeeTemperature(){
let that = this;
wx.showLoading({
title: '上传中...',
})
utils.PostApi({
url: "接口地址",
data: {
facePic: that.data.base64Src,
phone: wx.getStorageSync('phone'),
realName: wx.getStorageSync('realName')
},
success: function (res) {
console.log(res)
if (res.data.code == "200") {
wx.hideLoading();
var aibiUid =res.data.data.user_id;
var faceImage = res.data.data.image_url;
var faceId = res.data.data.face_id;
if (that.data.type==0){
wx.redirectTo({
url: `/pages/register/register?aibiUid=${aibiUid}&faceImage=${faceImage}&faceId=${faceId}&typeback=success`,
})
}else{
wx.redirectTo({
url: `/pages/informationEntry/informationEntry?aibiUid=${aibiUid}&faceImage=${faceImage}&faceId=${faceId}&typeback=success`,
})
}
console.log(res.data.data)
}else{
wx.hideLoading();
if (that.data.type == 0) {
wx.redirectTo({
url: `/pages/register/register?typeback=fail`,
})
} else {
wx.redirectTo({
url: `/pages/informationEntry/informationEntry?typeback=fail`,
})
}
}
}
})
},
//拍照
takePicture(){
var that = this;
console.log(this.data.flagSrc)
// // 获取用户的授权信息
wx.getSetting({
success: (res) => {
console.log(res)
if (res.authSetting['scope.camera'] == false) {
// 未授权，提示去授权
wx.showModal({
title: '应用申请使用你的摄像头',
content: '将会上传你摄录的照片及视频',
success: function (res) {
if (res.cancel) {
wx.showToast({
title: '拒绝授权',
icon: 'none',
duration: 1000
})
if (that.options.type == "register") {
wx.redirectTo({
url: '/pages/register/register?typeback=fail',
})
} else {
wx.redirectTo({
url: '/pages/informationEntry/informationEntry?typeback=fail',
})
}
} else if (res.confirm) {
wx.openSetting({
success: function (dataAu) {
console.log(dataAu)
if (dataAu.authSetting["scope.camera"] == true) {
wx.showToast({
title: '授权成功',
icon: 'success',
duration: 1000
})
that.setData({
isAuth: true
})
} else {
wx.showToast({
title: '授权失败',
icon: 'none',
duration: 1000
})
}
}
})
}
}
})
}else{
that.setData({
isAuth:true
})
that.takePhotos();
}
}
})
},
takePhotos(){
let that = this;
const ctx = wx.createCameraContext()
ctx.takePhoto({
quality: 'high',
success: (res) => {
console.log(res)
this.setData({
src: res.tempImagePath,//获取图片
flagSrc: true
})
// //图片base64编码
wx.getFileSystemManager().readFile({
filePath: res.tempImagePath, //选择图片返回的相对路径
encoding: 'base64', //编码格式
success: res => { //成功的回调
console.log(res)
// 调用接口
that.setData({
base64Src: res.data
})
}
})
},//拍照成功结束
fail: (err) => {
console.log(err)
}
})//调用相机结束
},
// 上传
uploadImg(){
this.getAibeeTemperature()
},
// 重新拍照
reTakePhoto(){
this.setData({
flagSrc: false,
src: "",//图片的链接
base64Src: "",
})
console.log(this.data.flagSrc)
},
// 用户不允许时触发
error(e) {
// 销毁组件
this.setData({
isAuth: false
})
},
stopImg(e){
console.log(e)
}
})javascript
/* pages/camera/camera.wxss */
page,.camera_wrap{
width: 100%;
height: 100%;
background:linear-gradient(180deg,rgba(0,0,0,0) 0%,rgba(0,0,0,0.69) 100%);
}
.camera_wrap .camera_box{
width:100%;
height: 60%;
}
.camera_wrap .footer_box{
width:100%;
height: 40%;
background: #fff;
position: relative;
}
.camera_wrap .footer_box .pic_box{
width: 200rpx;
padding-top:90rpx;
box-sizing: border-box;
margin: 0 auto;
}
.camera_wrap .footer_box .take_btn{
width: 200rpx;
height: 200rpx;
display: block;
padding: 0;
margin: 0 auto;
background-color:#fff;
border-radius: 0;
}
.camera_wrap .footer_box .take_btn image{
width: 100%;
height: 100%;
}
.camera_wrap .footer_box .pic_box .font_f{
color:#0066E5;
font-size:36rpx;
text-align: center;
}
.camera_wrap .footer_box .re_pic{
width: 140rpx;
box-sizing: border-box;
position: absolute;
left:90rpx;
top:148rpx;
text-align: center;
}
.camera_wrap .footer_box .re_pic .re_btn{
width: 64rpx;
height: 64rpx;
display: block;
padding: 0;
margin: 0 auto;
background-color:#fff;
border-radius: 0;
line-height: 0;
}
.camera_wrap .footer_box .re_btn image{
width: 100%;
height: 100%;
}
.camera_wrap .footer_box .re_pic .font_gr{
margin-top:10rpx;
font-size: 28rpx;
color: #32343B;
}流程图如下: 
上传之后的流程没在图里画，这里做下说明，点击上传的时候，调用Aibee的接口，进行对比，如果采集的人脸的信息和库里已有的信息匹配则采集成功，否则采集失败