vue结合vue-pdf实现pdf预览功能

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vue结合vue-pdf实现pdf预览功能

准备

工具

"vue": "^2.6.14",
"vue-pdf": "^4.3.0",

安装

npm install --save vue-pdf

实现

创建PreviewPdf组件

<template>
  <div class="pdf">
    <a-modal
      :visible="previewVisible"
      @cancel="cancel"
      width="90%"
      :closable="false"
      :keyboard="false"
    >
      <a-card>
        <pdf
            ref="pdf"
            :src="pdfUrl"
            :page="pageNum"
            @progress="loadedRatio = $event"
            @num-pages="pageTotalNum = $event"
        >
        </pdf>
      </a-card>
      <div class="info">
        <div>当前页数/总页数：{{ pageNum }}/{{ pageTotalNum }}</div>
      </div>
      <a-space>
        <a-button type="primary" @click.stop="prePage">上一页</a-button>
        <a-button type="primary" @click.stop="nextPage">下一页</a-button>
        <a-button type="primary" @click="enlarge">放大</a-button>
        <a-button type="primary" @click="reduce">缩小</a-button>
        <a-button type="primary" @click="back()">返回</a-button>
        <a-button type="primary" @click="downloadFile(pdfUrl)">下载</a-button>
      </a-space>
    </a-modal>
  </div>
</template>

<script>
import pdf from "vue-pdf";

export default {
  name: "pdfPreview",
  props: {
    pdfUrl: {
      type: String,
    },
    previewVisible: {
      type: Boolean,
      default() {
        return false
      }
    },
  },
  components: {pdf},
  data() {
    return {
      // 总页数
      pageTotalNum: 1,
      // 当前页数
      pageNum: 1,
      // 加载进度
      loadedRatio: 0,
      // 缩放百分比
      scale: 90,
      previewVisible: false
    }
  },

  methods: {
    // 切换上一页
    prePage() {
      let p = this.pageNum;
      if (this.pageNum === 1) {
        this.$message.info("没有上一页了")
        return
      }
      p = p > 1 ? p - 1 : this.pageTotalNum;
      this.pageNum = p;
    },

    // 切换下一页
    nextPage() {
      if (this.pageNum === this.pageTotalNum) {
        this.$message.info("没有下一页了")
        return
      }
      let p = this.pageNum;
      p = p < this.pageTotalNum ? p + 1 : 1;
      this.pageNum = p;
    },

    back() {
      window.location.reload()
    },

    downloadFile(pdfUrl) {
      window.location.href = pdfUrl
    },

    cancel() {
      this.previewVisible = false
      window.location.reload()
    },

    //放大
    enlarge() {
      if (this.scale == 100) {
        this.$message.info("已放大到最大比例：100%")
        return
      }
      this.scale += 5;
      this.$refs.pdf.$el.style.width = parseInt(this.scale) + "%";
    },

    //缩小
    reduce() {
      if (this.scale <= 60) {
        this.$message.info("已缩放至最小比例：60%")
        return
      }
      this.scale += -5;
      this.$refs.pdf.$el.style.width = parseInt(this.scale) + "%";
    },
  },
}
</script>

<style scoped>
.info {
  margin-top: 1%;
  height: 40px;
  font-weight: bold;
  font-size: 15px;
}
</style>

使用

模板

import PreviewPdf from "@/component/common/PreviewPdf";
components: {PreviewPdf},

<template>
    <PreviewPdf
        v-if="isPreview"
        :pdfUrl="pdfUrl"
        :preview-visible="previewVisible"
    ></PreviewPdf>

    // 预览按钮，可能是table的操作栏...
    <a @click="preview(item)">
        <a-icon type="eye"></a-icon>
        预览
    </a>
</template>

data

isPreview: false,
pdfUrl: '',
previewVisible: false

事件

methods: {
    preview(item) {
	  // pdfUrl就是可以通过浏览器地址栏访问的url
      this.pdfUrl = 'https://xxx.xxx.xxx/' + process.env.VUE_APP_BUCKET_NAME + '/' + item.filePath
	  // 控制PreviewPdf组件的显示
      this.isPreview = true
	  // 控制PreviewPdf组件的对话框的显示
      this.previewVisible = true
    },
}

本文标签： 功能vuePDF