vue-pdf实现文件预览放大、缩小、上下页

1.下载依赖

cnpm install --save vue-pdf

2.代码

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<style lang="less" scoped>
  .main {
    overflow: auto;
    max-width: 375px;
    max-height: 530px;
  }
</style>
<template>
  <div class="pdf">
    <div class="main">
      <pdf ref="pdf"
           :src="pdfUrl"
           :page="pageNum"
           :rotate="pageRotate"
           @password="password"
           @progress="loadedRatio = $event"
           @page-loaded="pageLoaded($event)"
           @num-pages="pageTotalNum=$event"
           @error="pdfError($event)"
           @link-clicked="page = $event">
      </pdf>
    </div>
    <div class="pdf-tab">
      <!-- <div 
           @click.stop="clock">顺时针</div>
      <div 
           @click.stop="counterClock">逆时针</div> -->
    </div>
    <button class="btn-def btn-pre"
            @click.stop="prePage">上一页</button>
    <button class="btn-def btn-next"
            @click.stop="nextPage">下一页</button>
    <div>{{pageNum}}/{{pageTotalNum}}</div>
    <button :class="{select:idx==0}"
            @touchstart="idx=0"
            @touchend="idx=-1"
            @click="scaleD">
      放大
    </button>
    <button :class="{select:idx==1}"
            @touchstart="idx=1"
            @touchend="idx=-1"
            @click="scaleX">
      缩小
    </button>
    <button @click="fileDownload(pdfUrl,''pdf文件'')">下载</button>
    <!-- <div>进度：{{loadedRatio}}</div> -->
    <!-- <div>页面加载成功: {{curPageNum}}</div> -->
  </div>
</template>
<script>
  import closeLoading from ''../../mixins/closeLoading''
  import pdf from ''vue-pdf''
  export default {
    name: ''Pdf'',
    mixins: [closeLoading],
    components: {
      pdf
    },
    data() {
      return {
        pdfUrl: "http://192.168.6.135:8882/A1.pdf",
        pageNum: 1,
        pageTotalNum: 1,
        pageRotate: 0,
        // 加载进度
        loadedRatio: 0,
        curPageNum: 0,
 
        scale: 100, //放大系数
        idx: -1,
      }
    },
    mounted: function () {
    },
    methods: {
      //下载PDF
      fileDownload (data, fileName) {
        let blob = new Blob([data], {
          //type类型后端返回来的数据中会有，根据自己实际进行修改
          type: "application/pdf;charset-UTF-8"
        });
        let filename = fileName || "报表.xls";
        if (typeof window.navigator.msSaveBlob !== "undefined") {
          window.navigator.msSaveBlob(blob, filename);
        } else {
          var blobURL = window.URL.createObjectURL(blob);
          // 创建隐藏<a>标签进行下载
          var tempLink = document.createElement("a");
          tempLink.style.display = "none";
          tempLink.href = blobURL;
          tempLink.setAttribute("download", filename);
          if (typeof tempLink.download === "undefined") {
            tempLink.setAttribute("target", "_blank");
          }
          document.body.appendChild(tempLink);
          tempLink.click();
          document.body.removeChild(tempLink);
          window.URL.revokeObjectURL(blobURL);
        }
      },
      //放大
      scaleD() {
        this.scale += 5;
        this.$refs.pdf.$el.style.width = parseInt(this.scale) + "%";
      },
 
      //缩小
      scaleX() {
        if (this.scale == 100) {
          return;
        }
        this.scale += -5;
        this.$refs.pdf.$el.style.width = parseInt(this.scale) + "%";
      },
      prePage() {
        var p = this.pageNum
        p = p > 1 ? p - 1 : this.pageTotalNum
        this.pageNum = p
      },
      nextPage() {
        var p = this.pageNum
        p = p < this.pageTotalNum ? p + 1 : 1
        this.pageNum = p
      },
      clock() {
        this.pageRotate += 90
      },
      counterClock() {
        this.pageRotate -= 90
      },
      password(updatePassword, reason) {
        updatePassword(prompt(''password is "123456"''))
        console.log(''...reason...'')
        console.log(reason)
        console.log(''...reason...'')
      },
      pageLoaded(e) {
        this.curPageNum = e
      },
      pdfError(error) {
        console.error(error)
      },
      pdfPrintAll() {
        this.$refs.pdf.print()
      },
      pdfPrint() {
        this.$refs.pdf.print(100, [1, 2])
      },
    }
  }
</script>
 
​