H5页面转成图片并下载到本地
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>html元素转canvas并一键生成png图片(支持img图片元素)</title>
<!-- html2canvas将Dom节点在Canvas里边画出来 -->
<script src="js/html2canvas.min.js"></script>
<!-- 将canvas图片保存成图片 -->
<script src="js/canvas2image.js"></script>
<script src="js/base64.js"></script>
<style>
p{
font-size: 15px;
font-family: 'Microsoft YaHei', 'Lantinghei SC', 'Open Sans', Arial, 'Hiragino Sans GB', 'STHeiti', 'WenQuanYi Micro Hei', 'SimSun', sans-serif;
}
#content{
border-radius: 3px;
}
#btnSave,#Download{
position: absolute;
left: 65px;
top: 320px;
width: 78px;
height: 30px;
background-color: #22b4f6;
color: #fff;
text-align: center;
border-radius: 3px;
border: none;
}
#Download{
margin-left: 250px;
}
.tx,.bt{
border: 1px solid #999;
width: 100px;
height: 20px;
border-radius: 3px;
}
.bt{
background-color: #22b4f6;
color: #fff;
text-align: center;
border: none;
}
</style>
</head>
<body>
<div id="content" style="width:188px;height:300px;border:1px solid #22b4f6;float:left;text-align:center;">
<p><img width="50" height="50" src="images/1.jpg" alt="头像"></p>
<p>昵称：richer</p>
<p>专业：前端 + 后端</p>
<p>语言：html、php、mysql</p>
<p>脚本：javascript</p>
<p><input type="text" class="tx" placeholder="微信公众号开发"></p>
<p><input type="button" class="bt" value="网站微站开发"></p>
</div>
<div style="width:60px;height:302px;float:left;text-align:center;line-height:302px;font-size:30px;color:#22b4f6;">==></div>
<div id="images" style="width:190px;height:302px;float:left;text-align:center;line-height:302px">图片预览区</div>
<button id="btnSave">转成图片</button>
<button id="Download">下载图片</button>
<script>
/*生成canvas图形*/
// 获取按钮id
var btnSave = document.getElementById("btnSave");
// 获取内容id
var content = document.getElementById("content");
// 进行canvas生成
btnSave.onclick = function(){
html2canvas(content, {
onrendered: function(canvas) {
//添加属性
canvas.setAttribute('id','thecanvas');
//读取属性值
// var value= canvas.getAttribute('id');
document.getElementById('images').innerHTML = '';
document.getElementById('images').appendChild(canvas);
}
});
}
</script>
<script>
/*
* 说明
* 不支持跨域图片
* 不能在浏览器插件中使用
* 部分浏览器上不支持SVG图片
* 不支持Flash
*/
var Download = document.getElementById("Download");
Download.onclick = function(){
var oCanvas = document.getElementById("thecanvas");
/*自动保存为png*/
// 获取图片资源
var img_data1 = Canvas2Image.saveAsPNG(oCanvas, true).getAttribute('src');
saveFile(img_data1, 'richer.png');
/*下面的为原生的保存，不带格式名*/
// 这将会提示用户保存PNG图片
// Canvas2Image.saveAsPNG(oCanvas);
}
// 保存文件函数
var saveFile = function(data, filename){
var save_link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
save_link.href = data;
save_link.download = filename;
var event = document.createEvent('MouseEvents');
event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
save_link.dispatchEvent(event);
};
</script>
</body>
</html>
