<template>
 <div class="pdf-box">
 //pdf展示
        <pdf
          class="pdf"
          :page="pageNum"
          :src="pdfForm.url"
          @progress="loadedRatio = $event"
          @num-pages="pageTotalNum = $event"
        ></pdf>
        //頁碼切換
        <div class="page-box">
          <el-button-group>
            <el-button
              type="primary"
              icon="el-icon-arrow-left"
              size="mini"
              @click="prePage"
              >上一頁</el-button
            >
            <el-button type="primary" size="mini" @click="nextPage"
              >下一頁<i class="el-icon-arrow-right el-icon--right"></i
            ></el-button>
          </el-button-group>
          //頁碼展示
          <div style=" color: #409EFF;display: flex;justify-content: flex-end;">
            {{ pageNum }} / {{ pageTotalNum }}
          </div>
        </div>
      </div>
</template>

<script>
import pdf from 'vue-pdf'
export default {
  name: 'pdf',
  components: { pdf },
  data () {
   pdfForm: { url: '' },
      // 查看pdf
      url:'',
      pageNum: 1,
      pageTotalNum: 1, // 總頁數(shù)
      loadedRatio: 0 // 當(dāng)前頁面的加載進(jìn)度，范圍是0-1 ，等于1的時(shí)候代表當(dāng)前頁已經(jīng)完全加載完成了
  },
  method:{
 // 上一頁
    prePage () {
      let page = this.pageNum
      page = page > 1 ? page - 1 : this.pageTotalNum
      this.pageNum = page
    },

    // 下一頁
    nextPage () {
      let page = this.pageNum
      page = page < this.pageTotalNum ? page + 1 : 1
      this.pageNum = page
    },
  }
 }
</script>