手机端点击下载按钮将页面保存成图片到本地

链接: https://pan.baidu.com/s/1bmZuTF84zl8C2mcQuk4Gtw 提取码: zbeq

直接上代码：

<!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/jquery-1.11.3.min.js"></script>
    <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: 180px;
            top: 540px;
            width: 78px;
            height: 30px;
            background-color: #22b4f6;
            color: #fff;
            text-align: center;
            border-radius: 3px;
            border: none;
        }
        #Download{
            margin-left: 560px;
        }
        .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>注意：html2canvas 只能在服务器中抓取img</div>
    <div id="content" style="500px;height:500px;border:1px solid #22b4f6;float:left;text-align:center; background: #fff;">
        
        <p>昵称：马云云</p>
        <p>技能：前端 + 后端 + 小程序 + webapp</p>
        <p>语言：html5、php、mysql</p>
        <p>脚本：javascript</p>
        <p>框架：vue.js、smarty、thinkphp、MUI、WeUI、Bootstrap</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="60px;height:302px;float:left;text-align:center;line-height:302px;font-size:30px;color:#22b4f6;">==></div>


    <div id="images" style="190px;height:302px;float:left;text-align:center;line-height:302px">图片预览区</div>


    <button id="btnSave">抓取图片</button><button id="Download">下载图片</button>
</body>
<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");
    var img_data1 = Canvas2Image.saveAsPNG(oCanvas, true).getAttribute('src');
    
    //因为手机端无法下载base64图片地址，需要用后台 代码转换为图片然后发送回前端
    //判断是否手机浏览器
    if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iPad)/i))) {
        //img_data1  图片路径
        $.ajax({
            type : "post",
                url : "/baseimg.php",
                data : {
                    "strImg":img_data1
                },
                success : function(data) {
                    console.log(data);
                    saveFile(data, 'richer.png');
                } 
            });
    }else {
        saveFile(img_data1, 'richer.png');
    }
}



// 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>

</html>

baseimg.php

<?php

$image = $_POST['strImg'];
$imageName = date("His",time())."_".rand(1111,9999).'.png';
if (strstr($image,",")){
  $image = explode(',',$image);
  $image = $image[1];
}
$path = "./".date("Ymd",time());
if (!is_dir($path)){ //判断目录是否存在 不存在就创建
  mkdir($path,0777,true);
}
$imageSrc= $path."/". $imageName; //图片名字
$r = file_put_contents($imageSrc, base64_decode($image));//返回的是字节数
if (!$r) {
 $tmparr1="图片生成失败";
 echo json_encode($tmparr);
}else{

$uril = "https://".$_SERVER['SERVER_NAME'];  //获取当前域名（不含端口号）
$imageSrc = substr($imageSrc,1);
$paths = $uril.$imageSrc;
 echo $paths;

}