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="width: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="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">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; }
