text: import {debounce} from './utils'
  export const itemListenerMixin={
      data() {
          return {
              refresh:null
          }
      },
      mounted() {
          this.refresh =debounce( this.$refs.scroll.refresh)
          this.itemImgListener=()=>{
              this.refresh()
          }
          this.$bus.$on('itemImageLoad',this.itemImgListener
              //    refresh()
          )
      //    console.log('我是混入中的内容');
      },
  }