vue的PDF预览插件(vue-pdf)，支持旋转、放大缩小、打印、下载等

1、安装插件（vue-pdf）

npm i [email protected]
npm i [email protected]

2、引用注册pdf组件

import pdf from "vue-pdf";
...
components: {
  pdf,
},

<template>
  <div class="pdf">
    <div class="show">
      <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_footer">
      <div class="info">
        <div>当前页数/总页数：{{ pageNum }}/{{ pageTotalNum }}</div>
        <div>进度：{{ loadedRatio }}</div>
        <div>页面加载成功: {{ curPageNum }}</div>
      </div>
      <div class="operate">
        <div class="btn" @click.stop="clock">顺时针</div>
        <div class="btn" @click.stop="counterClock">逆时针</div>
        <div class="btn" @click.stop="prePage">上一页</div>
        <div class="btn" @click.stop="nextPage">下一页</div>
        <div class="btn" @click="scaleD">放大</div>
        <div class="btn" @click="scaleX">缩小</div>
        <div class="btn" @click="pdfPrint()">打印所有指定页</div>
        <div class="btn" @click="pdfPrintAll()">打印所有</div>
        <div class="btn" @click="logContent()">获取页面信息</div>
        <div class="btn" @click="fileDownload(pdfUrl, 'pdf文件')">下载</div>
      </div>
    </div>
  </div>
</template>

3、pdf 常用属性与方法调用

   data() {
    return {
      pageTotalNum: 1, // 总页数
      pageNum: 1,  // 当前页数
      loadedRatio: 0,// 加载进度
      curPageNum: 0, // 页面加载完成
      scale: 100,  // 放大系数 默认百分百
      pageRotate: 0,  // 旋转角度 ‘90’的倍数才有效
    };
  },
  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 || "pdf.pdf";
      if (typeof window.navigator.msSaveBlob !== "undefined") {
        window.navigator.msSaveBlob(blob, filename);
      } else {
        var blobURL = window.URL.createObjectURL(blob);
        // 创建隐藏标签进行下载
        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() {
      // scale 是百分百展示 不建议缩放
      if (this.scale == 100) {
        return;
      }
      this.scale += -5;
      console.log(parseInt(this.scale) + "%");
      this.$refs.pdf.$el.style.width = parseInt(this.scale) + "%";
    },
    // 切换上一页
    prePage() {
      var p = this.pageNum;
      p = p > 1 ? p - 1 : this.pageTotalNum;
      this.pageNum = p;
    },
    // 切换下一页
    nextPage() {
      var p = this.pageNum;
      p = p < this.pageTotalNum ? p + 1 : 1;
      this.pageNum = p;
    },
    // 顺时针选中角度
    clock() {
      this.pageRotate += 90;
    },
    // 逆时针旋转角度
    counterClock() {
      this.pageRotate -= 90;
    },
    // pdf 有密码 则需要输入秘密
    password(updatePassword, reason) {
      updatePassword(prompt('password is "test"'));
      console.log("...reason...");
      console.log(reason);
      console.log("...reason...");
    },
    // 页面加载成功  当前页数
    pageLoaded(e) {
      this.$emit("current", e);
      this.curPageNum = e;
    },
    // 异常监听
    pdfError(error) {
      console.error(error);
    },
    // 打印所有
    pdfPrintAll() {
      this.$refs.pdf.print();
    },
    // 打印 第一页和第二页
    pdfPrint() {
      // 第一个参数 文档打印的分辨率
      // 第二个参数 文档打印的页数
      this.$refs.pdf.print(100, [1, 2]);
    },
    // 获取当前页面pdf的文字信息内容
    logContent() {
      this.$refs.pdf.pdf.forEachPage(function (page) {
        return page.getTextContent().then(function (content) {
          let text = content.items.map((item) => item.str);
          let allStr = content.items.reduce((initVal, item) => (initVal += item.str), "");
          console.log(allStr); // 内容字符串
          console.log(text); // 内容数组
        });
      });
    },
  },

4、常见报错

vue-pdf组件报错vue-pdf Cannot read properties of undefined (reading ‘catch‘)

vue-pdf组件报错vue-pdf Cannot read properties of undefined (reading ‘catch‘)

依赖版本解决报错问题

npm i pdfjs-dist@2.5.207
npm i vue-pdf@4.2.0