<el-autocomplete
 v-model="state4"
 :fetch-suggestions="querySearchAsync"
 placeholder="请输入内容"
 @select="((item)=>{handleSelect(item, index)})">
</el-autocomplete>

methods: {
    querySearchAsync(queryString, callback) {
      var list = [{}];
      //调用的后台接口
      //let url = 后台接口地址 + queryString;
      //从后台获取到对象数组
      this.$http({
        url: this.$http.adornUrl('yjtgateway/goods'),
        method: 'get',
        params: this.$http.adornParams({keyword:queryString})
      }).then(({data}) => {
        for(let i of data.content){
          i.value = i.goodsCode; //将想要展示的数据作为value
        }
        list = data.content;
        callback(list);
      }).catch((error) => {
        console.log(error)
      })
    },
    handleSelect(item,index) {
     this.dataForm.items[index] = item
    }
}