Vue-pdf实现在线预览PDF文件

前言

在大多数项目中都会遇到在线预览PDF文件，项目使用的是element ui，使用vue-pdf实现。

安装依赖

npm install --save vue-pdf

实现

<template>
    <div>
        <el-row>
            <el-button @click="onPreview" size="small">预览</el-button>
        </el-row>
        <el-dialog title="预览合同附件" :visible.sync="viewVisible" center width="60%" @close='closePreview'>
            <el-row :gutter="20">
                <span>共{{pageCount}}页， 当前第 {{pdfPage}} 页 </span>
                <el-button type="text" size="mini" @click.stop="previousPage">上一页</el-button>
                <el-button type="text" size="mini" @click.stop="nextPage">下一页</el-button>
            </el-row>
            <div>
                <pdf :src="src" :page="pdfPage" @num-pages="pageCount = $event" @page-loaded="pdfPage = $event" style="display: inline-block; width: 100%"></pdf>
            </div>
        </el-dialog>
    </div>
</template>
<script>
import pdf from 'vue-pdf'
import store from '@/store/'
export default {
    components:{
        pdf
    },
    data(){
        return {
            viewVisible: false,
            src: null,
            pdfPage : 1,
            pageCount: 0,
            token: store.getters.access_token,
        }
    },
    methods:{
        onPreview(){
            this.src = pdf.createLoadingTask({
                url: 'http://localhost:8082/file/demo.pdf',
                httpHeaders: {Authorization:'Bearer '+ this.token}
            });
            this.src.promise.then(pdf => {
                this.viewVisible = true;
            });
        },
        closePreview(){
            this.pdfPage = 1;
        },
        previousPage(){
            let p = this.pdfPage
            p = p > 1 ? p-1 : this.pageCount
            this.pdfPage = p
        },
        nextPage(){
            let p = this.pdfPage
            p = p < this.pageCount ? p+1 : 1
            this.pdfPage = p
        }
    }
}
</script>

效果

注意点

1、URL

url为文件地址路径

this.src = pdf.createLoadingTask({
    url: 'http://localhost:8082/file/demo.pdf',
});

2、设置请求头

可以通过httpHeaders来设置token等参数

httpHeaders: {Authorization:'Bearer '+ this.token}

3、src

这点比较重要，网上很多帖子都是这样的

this.src.then(pdf => {
    this.viewVisible = true;
})

会报错 TypeError: this.src.then is not a function

TypeError: this.src.then is not a function
    at VueComponent.onPreview (index.vue?6ced:241)
    at click (index.vue?aaff:261)
    at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854)
    at VueComponent.invoker (vue.runtime.esm.js?2b0e:2179)
    at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854)
    at VueComponent.Vue.$emit (vue.runtime.esm.js?2b0e:3888)
    at VueComponent.handleClick (element-ui.common.js?5c96:9413)
    at invokeWithErrorHandling (vue.runtime.esm.js?2b0e:1854)
    at HTMLButtonElement.invoker (vue.runtime.esm.js?2b0e:2179)
    at HTMLButtonElement.original._wrapper (vue.runtime.esm.js?2b0e:6917)

正确的是这样的

this.src.promise.then(pdf => {
    this.viewVisible = true;
});

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自学编程网。

编程技巧

前言

安装依赖

相关参数

实现

效果

注意点