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一:安装依赖
npm config set registry https://registry.npmjs.org //设置npm镜像源
npm config set registry https://registry.npmmirror.com //设置淘宝镜像源
npm i vue-pdf-embed -S
npm install --save pdfjs-dist // npm下载缓慢,请用cnpm或者淘宝镜像源
二:引入插件
import VuePdfEmbed from 'vue-pdf-embed';
import * as pdfjsLib from 'pdfjs-dist'; //pdfjs-dist版本一npm更新会出错,public下需要同步更新
将node_modules目录下 pdfjs-dist/build/pdf.worker.js及pdf.worker.js.map 复制一份放到项目 public 目录下后引入
三:代码实现
<div class="page-tool">
<div class="page-tool-item" @click="lastPage">上一页</div>
<div class="page-tool-item" @click="nextPage">下一页</div>
<div class="page-tool-item">{{ pageNum }}/{{ numPages }}</div>
<div class="page-tool-item" @click="pageZoomOut">放大</div>
<div class="page-tool-item" @click="pageZoomIn">缩小</div>
</div>
<vue-pdf-embed :source="source" :style="scaleStyle" :page="pageNum" />
const scaleStyle = computed(() => {
if (state.scale > 1) {
return `transform-origin: 0 0;transform:scale(${state.scale})`;
} else {
return `transform-origin: 50% 0;transform:scale(${state.scale})`;
}
});
const state = reactive({
source: '',
pageNum: 1,
numPages: 0,
scale: 1 // 缩放比例
});
const { source, pageNum, numPages, iconPic } = toRefs(state);
function getPdfUrl(data: string) {
state.source = data;
pdfjsLib.GlobalWorkerOptions.workerSrc = '/pdfjs-dist/pdf.worker.js'; //public目录下引用路径
const loadingTask = pdfjsLib.getDocument(data);
loadingTask.promise.then(pdf => {
state.numPages = pdf.numPages;
});
}
// 上一页
function lastPage() {
if (state.pageNum > 1) {
state.pageNum -= 1;
}
}
// 下一页
function nextPage() {
if (state.pageNum < state.numPages) {
state.pageNum += 1;
}
}
// 放大
function pageZoomOut() {
if (state.scale < 2) {
state.scale += 0.1;
}
}
// 缩小
function pageZoomIn() {
if (state.scale > 0.9) {
state.scale -= 0.1;
}
}
.page-tool {
display: flex;
position: absolute;
top: 10px;
left: 50%;
z-index: 100;
transform: translateX(-50%);
align-items: center;
background: rgb(66 66 66);
color: white;
border-radius: 19px;
cursor: pointer;
justify-content: center;
font-size: 15px;
.page-tool-item {
padding: 4px 10px;
cursor: pointer;
}
}
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