VUE-PDF实现pdf在线预览问题
作者：逩跑鍀小学生
这篇文章主要介绍了VUE-PDF实现pdf在线预览问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教
1、首先安装vue-pdf
在命令行中输入如下代码：
npm install --save vue-pdf
2、页面引用
新建index.vue
<template>
<div class="ins-submit-docs-content ins-submit-docs-pdf">
<div v-if="loading" style="position: absolute; top: 40%; width: 100%;text-align: center;">
<van-loading type="spinner" color="#fc8955" />
</div>
<van-empty description="文档加载失败" v-if="loadingError" />
<pdf ref="morePDF" :src="src"></pdf>
</div>
</template><script>
import Vue from 'vue';
import pdf from 'vue-pdf'
import { Loading } from 'vant';
Vue.use(Loading);
export default {
name : 'ins-docs-pdf',
props : {
src : {
type : String, //默认值，选中值
default : ''
}
},
data(){
return {
loading : true, //加载中
loadingError : false, //加载失败
}
},
watch : {
src : {
deep : true,
immediate: true,
handler(val){
if(val){
this.getPDFnums(val)
}
}
}
},
components: {
pdf
},
methods:{
//计算pdf页码总数
getPDFnums(url) {
this.loading = true
//let loadURL = pdf.createLoadingTask(url)
let loadURL = pdf.createLoadingTask({
url: url,//你的pdf地址
})
loadURL.promise.then(pdf => {
this.$set(this, 'docsPDF.numPages', pdf.numPages)
this.loading = false
}).catch(err => {
this.loading = false;
this.loadingError = true;
})
}
}
}
</script>3、当PDF有很多页的时候
直接v-for 循环，直接显示完
<template>
<div class="ins-submit-docs-content ins-submit-docs-pdf">
<div v-if="loading" style="position: absolute; top: 40%; width: 100%;text-align: center;">
<van-loading type="spinner" color="#fc8955" />
</div>
<van-empty description="文档加载失败" v-if="loadingError" />
<pdf ref="morePDF" :src="src" :page="i" v-for="i in numPages" :key="i"></pdf>
</div>
</template><script>
import Vue from 'vue';
import pdf from 'vue-pdf'
import { Loading } from 'vant';
Vue.use(Loading);
export default {
name : 'ins-docs-pdf',
props : {
src : {
type : String, //默认值，选中值
default : ''
}
},
data(){
return {
loading : true, //加载中
loadingError : false, //加载失败
numPages : 0,
}
},
watch : {
src : {
deep : true,
immediate: true,
handler(val){
if(val){
this.getPDFnums(val)
}
}
}
},
components: {
pdf
},
methods:{
//计算pdf页码总数
getPDFnums(url) {
this.loading = true
//let loadURL = pdf.createLoadingTask(url)
let loadURL = pdf.createLoadingTask({
url: url,//你的pdf地址
})
loadURL.promise.then(pdf => {
this.numPages = pdf.numPages
this.$set(this, 'docsPDF.numPages', pdf.numPages)
this.loading = false
}).catch(err => {
this.loading = false;
this.loadingError = true;
})
}
}
}
</script>4、当PDF很大的时候
你会发现PDF加载回很慢，并且偶尔会跳出加载；
这时就用到了下边的代码；PDF分页展示；
并且解决PDF预览的时候偶尔中文会乱码，借用VUE-PDF中CMapReaderFactory
<template>
<div class="ins-submit-docs-content ins-submit-docs-pdf">
<div v-if="loading" style="position: absolute; top: 40%; width: 100%;text-align: center;">
<van-loading type="spinner" color="#fc8955" />
</div>
<van-empty description="文档加载失败" v-if="loadingError" />
<div v-show="numPages <= 50">
<pdf ref="morePDF" :src="src" :page="i" v-for="i in numPages" :key="i"></pdf>
</div>
<div v-show="numPages > 50">
<pdf ref="PDF" :src="src" :page="currentPage" @num-pages="numPages=$event" @loaded="loadPdfHandler"></pdf>
<div class="ins-pdf-button-box">
<span @click.stop="prePage">上一页</span>
<span>{{currentPage}}/{{numPages}}</span>
<span @click.stop="nextPage">下一页</span>
</div>
</div>
</div>
</template><script>
import Vue from 'vue';
import pdf from 'vue-pdf'
import CMapReaderFactory from 'vue-pdf/src/CMapReaderFactory.js';
import { Loading } from 'vant';
Vue.use(Loading);
export default {
name : 'ins-docs-pdf',
props : {
src : {
type : String, //默认值，选中值
default : ''
}
},
data(){
return {
loading : true, //加载中
loadingError : false, //加载失败
numPages : 0, //分页
currentPage : 1, //当前显示页数
}
},
watch : {
src : {
deep : true,
immediate: true,
handler(val){
if(val){
this.getPDFnums(val)
}
}
}
},
components: {
pdf
},
methods:{
//计算pdf页码总数
getPDFnums(url) {
this.loading = true
//let loadURL = pdf.createLoadingTask(url)
let loadURL = pdf.createLoadingTask({
url: url,//你的pdf地址
CMapReaderFactory
})
loadURL.promise.then(pdf => {
this.numPages = pdf.numPages
this.currentPage = 1
this.$set(this, 'docsPDF.numPages', pdf.numPages)
this.loading = false
}).catch(err => {
this.loading = false;
this.loadingError = true;
})
},
// 上一页
prePage() {
var page = this.currentPage
page = page > 1 ? page - 1 : this.numPages
this.currentPage = page
},
// 下一页
nextPage() {
var page = this.currentPage
page = page < this.numPages ? page + 1 : 1
this.currentPage = page
},
// 回调
loadPdfHandler(e) {
this.currentPage = e
}
}
}
</script>总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。