html2canvas 保存网页截图 图片不显示_html/css_WEB-ITnose
## 问题描述：两张图片，一张是用户上传的图片，另一张是模板图，中间是透明的，可以制作相框，并保存。使用html2canvas对两个img标签进行截图。在写demo的时候html2canvas没有报错但是所截的是空白，若换成文字就可以。
## 原因分析：找了半天才知道，如果截图部分包含图片的话，程序必须放在服务器下面进行，不然的话就是空图片。
- 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.
##代码实例"
<!DOCTYPE html>
<html>
<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; } #p1{ height: 500px; width: 100%; }
#p2{ position: fixed; bottom: 0; background: red; }
</style><body> <p id="p1"> <img id="img1" src="img/01.jpg">
<img id="img2" src="img/02.jpg" style="width:300px">
</p> <p id="p2"></p></body><script type="text/javascript"> html2canvas($('#p1'),
{
onrendered: function(canvas)
{
var oImgPNG = Canvas2Image.saveAsPNG(canvas, true);
$('#p1').hide();
$('#p2').html(oImgPNG);
},
width: 500,
height: 500 });
</script></html>"
## 效果展示- 没有服务器谷歌浏览器下![没有服务器谷歌浏览器下]
(https://static.oschina.net/uploads/img/201601/08225723_ndxo.png "在这里输入图片标题")
- 没有服务器火狐浏览器下![没有服务器火狐浏览器下]
(https://static.oschina.net/uploads/img/201601/08225751_vJBo.png "在这里输入图片标题")
## 说明只要火狐浏览器下可以显示图片就可以说明程序几乎没有问题O(∩_∩)O哈哈~## 小弟才疏学浅，如有错误望大神指点，O(∩_∩)O
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