之前在网上找到一个用 <a> 的 download属性下载的方法,确实很简单也很方便,但此方法不支持IE,无奈又找到另一方法。
使用html2canvas将页面转成图,用canvas2image下载
本例使用的版本:
安装
npm install html2canvas canvas2image --save
引入
import html2canvas from 'html2canvas';require('./canvas2image.js');
canvas2image.js 需要改动一下,以便绑在window上
(function($){ Canvas2Image = function () { ... }}
_dataURL 可以用来回显,Canvas2Image.saveAsPNG(canvas) 会直接下载。
Canvas2Image提供了下面几种方法:
Canvas2Image.saveAsImage(canvasObj, width, height, type)Canvas2Image.saveAsPNG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canvas2Image.saveAsGIF(canvasObj, width, height)Canvas2Image.saveAsBMP(canvasObj, width, height)Canvas2Image.convertToImage(canvasObj, width, height, type)Canvas2Image.convertToPNG(canvasObj, width, height)Canvas2Image.convertToJPEG(canvasObj, width, height)Canvas2Image.convertToGIF(canvasObj, width, height)Canvas2Image.convertToBMP(canvasObj, width, height)
在vue中可以用$refs 确定DOM;
backgroundColor: null,此句可使转出的图没有白边
methods: { toImage() { let _this = this; html2canvas(this.$refs.index,{ backgroundColor: null }).then((canvas) => { let _dataURL = canvas.toDataURL("image/png"); // _this.dataURL = _dataURL; Canvas2Image.saveAsPNG(canvas) }); },
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武林网。
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