vue实现移动端图片上传功能

<template>
 <div class="box">
  <div class="upDiv">
    {{labTex}} //标题
    //上传按钮
    <input ref="uploadInput"
        type="file"
        class='upinp'
        name="file"
        value=""
        accept="image/gif,image/jpeg,image/jpg,image/png"
        @change="selectImg($event)"/>
  </div>
  //显示上传图片的区域
  <div :class="operationShow?'operation-div':'operation-div hide'">
      <img class="shoImg" :src="imgDefault">
  </div>
 </div>
</template>
<script>
export default {
  props: {
    value:{
      type:String ,
      default:''
    },
    labTex:{
      type:String ,
      default:''
    },
    imgDefault:{
      type:String ,
      default:''
    }
  },
  data() {
    return {
      dataUrl: '',
      defaultImg:''
    }
  },
  mounted() {
    console.log(this.value)
    console.log(this.labTex)
  },
  // input的change回调第一个参数是event对象
  methods: {
    selectImg(e){
     const imgFile = e.target.files[0];
      if (imgFile)
      {  
        this.operationShow=true
        if(this.checkFile(imgFile)){
          this.upload(imgFile);
        }
      }
    
    },
    checkFile(file){
      //文件为空判断
      if (file === null || file === undefined) {
        alert("请选择您要上传的文件！");
        return false;
      }else{
        return true;
      }
      let size = Math.floor(file.size / 1024);
      // 这个条件还得改
      if (size!=0) {
        return true;
      }else{
        return false
      }
    },
    upload(file){
       try {
        let self = this;
        var result='';
        //执行上传操作
        var xhr = new XMLHttpRequest();
        xhr.open("post", ApiUrl+"/member/image/upload", true);
        xhr.onreadystatechange = function () {
          if (xhr.readyState == 4) {
            if (xhr.status == 200) {
              let returnData = $.parseJSON(xhr.responseText);
              if (!returnData) throw new Error("上传失败SERVER");
              if (!returnData.code) throw new Error("上传失败SERVER")
              if (returnData.code == 200) {
                alert("上传成功")
                //显示图片地址
                self.$emit('change-img',returnData.name);
                self.defaultImg = returnData.url;
              } else {
                alert("上传失败SERVER")
              }
              console.log(""+returnDate)
            } else {
              alert("上传失败")
            }
          };
        };
        var token = getMemberToken();
        //表单数据
        var fd = new FormData();
        fd.append("token", token);
        fd.append("file", file);
        //执行发送
        result = xhr.send(fd);
      } catch (e) {
        console.log(e);
        alert(e);
      }
    }
  }
}
</script>
<style>
.box {
  height: 11rem;
  margin-top: 0.5rem;
}
.upDiv{
  position:relative;
  height:1.2rem;
  width:100%;
  margin-bottom:0.08rem;
  width:5.5rem;
  text-align: center;
  z-index:10;
  font-size: 0.6rem;
  padding: 0 0.2rem;
  border-radius: 0.2rem;
  border-radius: 0.4rem;
  color: #fff;
  border: none;
  height: 1.2rem;
  line-height: 1.2rem;
  display: inline-block;
  background: #0097ffd9;
}
.operation-div{
  width: 15rem;
  height: 9.2rem;
}
.operation-div img{
  width:100%;
  height:100%;
}
.upDiv .upinp{
  position:absolute;
  left:0px;
  right:0px;
  right:0px;
  bottom:0px;
  z-index:1;
  opacity:0;
}
.shoImg{
  width:15rem;
  border-radius:0.05rem
}
</style>

<upload-img 
   :lab-tex="`上传银行卡正面`"
    :img-default="imgFourDefault"
    v-on:change-img="chooseFourImg"
></upload-img>