el-autocomplete提示不出現(xiàn)

使用el-autocomplete，提示怎么弄都不出現(xiàn)，不知道是什么原因，求助各位大神相助。

 <el-autocomplete
                placeholder="請輸入文字搜索"
                icon="search"
                v-model="input"
                minlength=1
                maxlength=100
                :fetch-suggestions="querySearchAsync"
                @select="handleSelect"
                :on-icon-click="handleIconClick">
              </el-autocomplete>

      loadAll() {
        return new Promise((resolve, reject) => {
          let postInfoObj = {}
          postInfoObj.title = this.input
          postInfoObj.note = this.input
          searchInfosByTitleOrNote(1, 10, JSON.stringify(postInfoObj)).then(res => {
            // console.log(res.resultList)
            var array = []
            var maxSize = 5
            if (res.data.resultList.length <= 5) {
              maxSize = res.data.resultList.length
            }
            for (var i = 0; i < maxSize; i++) {
              var obj = {}
              obj.value = res.data.resultList[i].title
              array.push(obj)
            }
            if (array.length !== 0) {
              this.searchInfoResults = array
            } else {
              this.searchInfoResults = []
            }
            if (this.searchInfoResults.length !== 0) {
              resolve()
            } else {
              reject()
            }
          })
        })
      },
      querySearchAsync(queryString, cb) {
        let _this = this
        if (this.input === undefined) {
          cb([])
          return
        }
        this.input = this.input.trim()
        if (this.input === '') {
          cb([])
          return
        } else {
          this.loadAll().then(() => {
          console.log(_this.searchInfoResults)
            cb(_this.searchInfoResults)
          })
        }
      },

searchInfoResults是異步獲取的，結(jié)果用console是可以獲取的到的，可是不知道為什么就是不顯示提示框