vue-pdf放大缩小 滚动条
时间: 2023-09-10 22:14:24 浏览: 142
要实现在vue-pdf中放大缩小以及滚动条的效果,你可以在vue组件中引入pdfjs库,然后使用pdfjs提供的API来实现:
1. 安装pdfjs:
```
npm install pdfjs-dist --save
```
2. 引入pdfjs:
```
import pdfjsLib from 'pdfjs-dist';
```
3. 加载pdf文件:
```
pdfjsLib.getDocument(url).promise.then(pdf => {
// 加载完成后的处理逻辑
});
```
4. 渲染pdf:
```
pdf.getPage(pageNumber).then(page => {
const canvas = document.getElementById('canvas');
const viewport = page.getViewport({ scale: scale });
const context = canvas.getContext('2d');
canvas.height = viewport.height;
canvas.width = viewport.width;
const renderContext = {
canvasContext: context,
viewport: viewport
};
page.render(renderContext).promise.then(() => {
// 渲染完成后的处理逻辑
});
});
```
5. 实现放大缩小:
```
const zoomInButton = document.getElementById('zoom-in');
const zoomOutButton = document.getElementById('zoom-out');
let scale = 1;
zoomInButton.addEventListener('click', () => {
scale += 0.1;
renderPage(pageNumber, scale);
});
zoomOutButton.addEventListener('click', () => {
scale -= 0.1;
renderPage(pageNumber, scale);
});
```
6. 实现滚动条:
```
const container = document.getElementById('container');
container.addEventListener('scroll', () => {
const scrollTop = container.scrollTop;
const pageHeight = canvas.height * scale;
if (scrollTop + container.offsetHeight >= pageHeight) {
// 滚动到底部的处理逻辑
}
});
```
以上是一个大体的实现思路,具体的实现过程可能还需要根据具体的需求来进行调整。
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