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Vue-Uni-App小程序实现身份证识别~
需求：实现一个身份证的识别功能！看下方图片！ 思路：（把用户上传的身份证图片转成base64请求接口发送给后端，后端返回对应的信息渲染到页面上就行了！） 
识别出来后
第一步：在components新建 image-uploader.vue 代码如下：
export default {
name: "uploader",
props: {
fileList: {
type: Array,
default: () => [],
},
// 默认不允许多选图片
mutiple: {
type: Boolean,
default: false,
},
// 限制上传文件数量
maxUpload: {
type: Number,
default: 1,
},
previewWidth: {
type: String,
default: "",
},
previewHeight: {
type: String,
default: "",
},
previewImage: {
type: String,
default: "",
},
// 是否可删除
deletable: {
type: Boolean,
default: false,
},
// camera
camera: {
type: Boolean,
default: false,
},
useSlot: {
type: Boolean,
default: false,
},
},
data() {
return {
defaultImage: null,
inputId: "",
};
},
create() {},
mounted() {
this.defaultImage = this.previewImage;
this.inputId = "fileid" + "_" + Math.random() * 10;
var input = document.createElement("input");
input.id = this.inputId;
input.type = "file";
if (this.camera) {
input.setAttribute("capture", "camera");
}
input.style.display = "none";
input.className = "uploader-input";
input.accept = "image/*";
let that = this;
input.onchange = (event) => {
let file = document.getElementById(this.inputId);
let fileName = file.value;
let files = file.files;
if (fileName == null || fileName == "") {
} else {
if (files[0]) {
let reader = new FileReader();
reader.readAsDataURL(files[0]);
reader.onload = function(e) {
var data = e.target.result;
that.defaultImage = data;
that.$emit("after-read", data);
};
}
}
// var file = this.file.target.files[0];
// var reader = new FileReader();
// reader.readAsDataURL(file);
// reader.onload = function(e) {
// var data = e.target.result;
// me.imgbase = data;
// console.log('Base64', data);
// };
};
this.$refs.input.$el.appendChild(input);
},
methods: {
handleImage() {
let file = document.getElementById(this.inputId);
file.click();
},
deleteImage(e, index) {
this.$emit("delete", index);
},
},
};
.uploader-container {
.upload-image-box {
position: relative;
margin-right: 8rpx;
margin-bottom: 8rpx;
.img-preview {
border-radius: 10rpx;
}
.close-icon {
position: absolute;
right: -20rpx;
top: -15rpx;
width: 40rpx;
height: 40rpx;
background-color: red;
border-radius: 50%;
z-index: 20;
}
}
.img-preview {
width: 100%;
}
.uplader-upload {
position: relative;
// background-color: #f7f8fa;
cursor: pointer;
.uploader-input {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
opacity: 0;
top: 0;
left: 0;
z-index: 10;
cursor: pointer;
}
}
.uplader-upload-slot {
position: relative;
min-width: 160rpx;
min-height: 160rpx;
.uploader-input {
position: absolute;
width: 100%;
height: 100%;
overflow: hidden;
opacity: 0;
top: 0;
left: 0;
z-index: 10;
cursor: pointer;
}
}
}
第二步：在你需要的页面注册组件：代码如下
import Uploader from "@/components/image-uploader.vue";
在export default 下面注册
components: {
Uploader
},
开始使用
data card{}里面是放的背景图片！
data() {
return {
card: {
url1: "../../static/imgs/idcard1.jpg",
url2: "../../static/imgs/idcard2.jpg",
},
}
},
template
效果如下 可以看见背景图片已经出来了！用户点击也可以选择图片了！ 
把图片转成base64
template
图片已经转成了base64的转码，这打印base64到控制台!
chooseImgFront(e) {
console.log(e);
},
 调用后端的接口，传入base64，根据你们的需求来，接口不是活的
import request from './http'
export default {
// 身份证正面识别接口
getIDCardFrontInfo(data) {
return request({
url: `blade-lhyg/user/user_staff/identity/frontBase64`,
method: 'POST',
data
});
},
// 身份证正面识别接口
getIDCardReverseInfo(data) {
return request({
url: `blade-lhyg/user/user_staff/identity/contraryBase64`,
method: 'POST',
data
});
},
// 身份认证
authentication(data) {
return request({
url: `blade-lhyg/user/user_staff/identity/authentication`,
method: 'POST',
data
});
},
}
调用接口代码：
async chooseImgFront(e) {
uni.showLoading({
title: "加载中",
mask: true,
});
try {
const { code, data } = await this.$api.certify.getIDCardFrontInfo({
phoneNo: this.$store.getters.phoneNo,
photo: e,
});
if (code === 200) {
Object.assign(this.form, data);
}
} catch (error) {
} finally {
uni.hideLoading();
}
},
数据已经请求过来了 
接下来就是数据渲染，数据渲染就不写了太简单了，就是把数据保存到list[]里面然后{{}}就行了！
最终效果图 
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