<div class="updata-component" style="width:100%;">
   <div class="demo-upload-box clearfix">
     <div class="demo-upload-image-box" v-if="imageUrlArr && imageUrlArr.length">
       <div class="demo-upload-image" v-for="(item,index) in imageUrlArr" :key="index">
         <img :src="item">
         <div class="demo-upload-box-cover">
          <!-- 點擊刪除 -->
           <i class="el-icon-delete" style="position: absolute;left: 30%;top: 80%;z-index:2;color:#fff;"
             @click="handleRemoves(index)"></i>
              <!-- 點擊瀏覽 -->
             <i class="el-icon-zoom-in" @click="handleView(index)" style="position: absolute;left: 56%;top: 80%;z-index:2;color:#fff;"></i>
         </div>
       </div>
     </div>
     <div class="demo-upload-btn" v-show="isshowlng">
       <input ref="uploadInput" type="file" class="file" @change="handleSuccess">
       <i slot="default" class="el-icon-plus"></i>
       <input type="button" class="btn" @click="clickFile" />
     </div>
   </div>
   <!-- 查看大圖 -->
   <el-dialog :visible.sync="dialogVisible" :modal-append-to-body="false">
       <img width="100%" :src="bigPicSrc" alt="">
     </el-dialog>
 </div>
data(){
	return{
		bigPicSrc: '',
        imageUrlArr: [],//頁面展示url數(shù)組
        filesData: [],//file數(shù)組
        isshowlng:true,//判斷上傳圖片按鈕是否顯示
	}
},
methods:{
	// 文件上傳接收
    handleSuccess (e) {
      console.log('------',e)
      console.log('imgs.lenght',this.imgs.length)
      var lng=6-this.imgs.length
      console.log('lng',lng)
      let file = e.target
      for (let i = 0; i < file.files.length; i++) {
        this.imageUrlArr.push(window.URL.createObjectURL(file.files.item(i)))
        this.filesData.push(file.files[i])
      }
      console.log('this.filesData',this.filesData)
      console.log('this.filesData.length',this.filesData.length)
      if(this.filesData.length>=lng){
        this.isshowlng=false
      }else{
        this.isshowlng=true
      }
    },
    clickFile () {
      const input = this.$refs.uploadInput
      input.click()
    },
    // 刪除上傳的案例圖
    handleRemoves (index) {
      console.log('刪除')
      this.imageUrlArr.splice(index, 1)
      this.filesData.splice(index, 1)
      var lng=6;//限制最多上傳6張
      if(this.filesData.length>=lng){
        this.isshowlng=false
      }else{
        this.isshowlng=true
      }
      this.$forceUpdate()
    },
    // 查看大圖
    handleView (index) {
      console.log('查看大圖')
      this.dialogVisible=true
      this.bigPicSrc = this.imageUrlArr[index]
    },
}
<style>
/* ------------------------- */
.demo-upload-image-box{
  height: 150px;
  /* width: 120px; */
  /* padding: 10px; */
  float: left;
}
.demo-upload-btn{
  width: 115px;
  height: 115px;
  background-color: #fbfdff;
  border: 1px dashed #c0ccda;
  border-radius: 6px;
  text-align: center;
  position: relative;
  float: left;
}
.demo-upload-image{
  width: 117px;
  height: 117px;
  margin-right: 5px;
  display: inline-block;
  position: relative;
}
.demo-upload-image img{
  width: 115px;
  height: 115px;
}
.big-pic{
  position: fixed;
    left: 40%;
    top: 20%;
}
.big-pic img{
  width: 400px;
  height: 300px;
}
.file {
  width: 115px;
  height: 115px;
  display: none;
}
.btn {
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 60px;
  background: rgba(0, 0, 0, 0);
  z-index: 10;
  border: none;
  cursor: pointer;
}
.demo-upload-btn .el-icon-plus{
  line-height: 110px;
  font-size: 16px;
  /* position: absolute;
    left: 40px; */
}
.el-icon-plus:before{
  font-size: 30px;
  color: #8c939d;
}
.demo-upload-box-cover{
  background: rgba(0,0,0,0.3);
  width: 100%;
  height: 100%;
  position:absolute;
  left:0;
  top:0;
  border-radius:5px;
}
</style>