html2canvas 保存網頁截圖圖片不顯示

時間 2020-01-09

標籤 html2canvas html canvas 保存網頁截圖圖片顯示欄目 HTML 简体版

原文原文鏈接

問題描述

兩張圖片，一張是用戶上傳的圖片，另外一張是模板圖，中間是透明的，能夠製做相框，並保存。使用html2canvas對兩個img標籤進行截圖。在寫demo的時候html2canvas沒有報錯可是所截的是空白，若換成文字就能夠。javascript

緣由分析

找了半天才知道，若是截圖部分包含圖片的話，程序必須放在服務器下面進行，否則的話就是空圖片。css

It will not work if you run this html file without any web server . If you are playing around on your PC then install XAMPP or any other web server (Easiest option http://www.apachefriends.org/en/xampp.html) and put the image ,JavaScript and HTML code in C:\xampp\htdocs (if C dirive is your installation drive) and run using the server. I have tested it in Chrome and its working.
參考連接：http://stackoverflow.com/questions/14004607/html2canvas-not-working-on-google-chrome

##代碼實例html

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script src="js/jquery.js"></script>
	<script src="js/html2canvas.js"></script>
	<script src="js/canvas2image.js"></script>
</head>
<style type="text/css">
	img{
		width: 500px;
		height: 300px;
		position: fixed;
	}
	#div1{
		height: 500px;
		width: 100%;
	}
	#div2{
		position: fixed;
		bottom: 0;
		background: red;
	}
</style>
<body>
	<div id="div1">
		<img id="img1" src="img/01.jpg">
		<img id="img2" src="img/02.jpg" style="width:300px">
	</div>
	<div id="div2"></div>
</body>
<script type="text/javascript">
	html2canvas($('#div1'), {
	   onrendered: function(canvas) {
	     var oImgPNG = Canvas2Image.saveAsPNG(canvas, true); 
	     $('#div1').hide();
	     $('#div2').html(oImgPNG);
	  },
	  width: 500,
	  height: 500
	});
</script>
</html>