vue如何使用pdf.js实现在线查看pdf文件功能

npm install --save vue-pdf

<template>
    <div>
		<el-table :data="dataList">
	        <el-table-column prop="fieldName" width="120" label="操作">
	          <template slot-scope="scope">
	            <span @click="look(scope.row)">查看</span>
	          </template>
	        </el-table-column>
       </el-table>
	   <el-dialog title="预览" :visible.sync="dialogVisible" :before-close="closePdf">
      	 <pdf v-for="i in numPages" :key="i" :src="pdfSrc" :page="i" />
       </el-dialog>
	</div>
<template>
<script>
	import pdf from 'vue-pdf'
	export default {
	  components: {
	    pdf
	  },
	  data() {
   		 return {
  		 	  dialogVisible: false,
		      numPages: 1,
		      pdfSrc:"",
		      close:false,
   		 }
   	  },
   	  methods: {
		// 查看预览
	    look(row) {
	      const that = this;
	      that.pdfSrc = "";
		  // 接口文件地址（接口入参拼出来的路径）
	      const url = `${Host}xxxxxx/xxxx/xxx?fileId=${row.fileId}&amp;fileName=${row.fileName}.pdf`;
		  // 如果调用接口（接口的responseType一定要是blob，默认json，不然解析出来的pdf是空白的）后拿的返回的值（乱码的pdf铭文(二进制文件流)）则需要转一下
		  // const url = window.URL.createObjectURL(new Blob([res]), { // res为接口返回值
			// type: "application/msword"
		  // });
	      that.pdfSrc = pdf.createLoadingTask(url)
	      that.pdfSrc.promise.then(pdf => {
	        that.dialogVisible = true;
	        that.numPages = pdf.numPages
	        //保证pdf加载成功，否则不能关闭弹层
	        setTimeout(() => {
	          that.close = true;
	        }, 2000);
	      })
	      .catch(error => {
	        that.$message.error("无效的PDF文件！");
	      })
	    },
	    //此方法解决第一次查看pdf文字没有加载完成影响后续查看
	    closePdf(done){
	      if(this.close) {
	        this.numPages = 1;//必须重置，多次查看会出现头部内容缺失
	        this.close = false;
	        done();
	      } else {
	        this.$message.warning("PDF文件加载中");
	      }
	    }
	  }
	}
</script>

<div v-html="responseData"/>