//判断手机为安卓还是ios 安卓html2canvas方法 ios系统dom-to-image方法 $(".code").click(function() { var u = navigator.userAgent; var isiOS = !!u.match(/(i[^;]+;( U;)? CPU.+Mac OS X/); var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端 if(isiOS) { window.location.href = "mycodeios.html" } else if(isAndroid) { window.location.href = "mycode.html" } })
安卓html2canvas方法
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"> <title>分享</title> <link rel="stylesheet" type="text/css" href="css/reset.css" /> <style type="text/css"> /*头部*/ body { background: #FFFFFF; height: 0 !important; } .container { max- 750px; min- 32px; margin: 0 auto; background: #FFFFFF; } .zhe { position: fixed; max- 750px; min- 32px; 100%; height: 100%; background: #45A196; z-index: 9; } .imge { position: absolute; max- 750px; min- 32px; 90%; height: 100%; margin: 0% 5%; z-index: 99; /*background: url(codeimg/code.jpg) no-repeat;*/ /*background-size: contain;*/ } .left { position: absolute; left: 12%; top: 70%; color: #FFFFFF; font-size: 26px; letter-spacing: 5px; } .bottom { position: absolute; right: 38%; top: 65%; } .codebotom { position: absolute; padding: 10px; background: #FFFFFF; 90px; height: 90px; } .butright_img { position: absolute; 80px; height: 80px; margin: 5px; top: 0px; left: 0px; } .textbottom { position: absolute; 40px; letter-spacing: 5px; color: #FFFFFF; top: 20px; left: -45px; } .butright { position: absolute; bottom: 50px; right: 15%; color: #4BA59B; padding: 10px 20%; border-radius: 3px; z-index: 9999; color: #ffffff; text-align: center; } .image { display: block; max- 750px; min- 32px; 100%; position: absolute; top: 0px; left: 0px; background: #FFFFFF; z-index: 9999; } </style> </head> <body> <div class="container"> <!--二维码--> <div class="zhe"></div> <div class="imge"> <div style="position: absolute; top: 0px; left: 0px;"> <img src="codeimg/code.jpg" /> </div> <div style=" 100%;height: 100%; position: relative;"> <div class="left state"></div> <div class="bottom"> <div class="textbottom">扫码立即注册</div> <div class="codebotom"> <!--<div id="qrcode" class="butright_img"></div>--> </div> </div> </div> <div> <div class="butright">长按保存图片</div> </div> </div> <div class="image" style="display: block;"> </div> </div> </body> <script src="js/config.js"></script> <script src="js/jquery-2.1.4.min.js" type="text/javascript" charset="utf-8"></script> <!--<script src="js/fenxiang.js" type="text/javascript" charset="utf-8"></script>--> <script src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script> <!--二维码--> <script src="js/jquery.qrcode.logo.min.js" type="text/javascript" charset="utf-8"></script> <!--html2canvas图片--> <script type="application/javascript" src="http://html2canvas.hertzen.com/dist/html2canvas.min.js"></script> <script type="text/javascript"> // 倒计时 $(function() { var openid_list = eval(decodeURIComponent(localStorage.getItem("openid"))) var openid = openid_list[1] var access_token = openid_list[0] /*监听返回 iosbug*/ window.history.pushState(null, null, "#"); window.addEventListener('popstate', function(e) { window.location.href = 'my.html' }, false); //创建二维码 /*function createQRCode(id, url, width, height, src) { $('#' + id).empty(); jQuery('#' + id).qrcode({ render: 'canvas', text: url, width, //二维码的宽度 height: height, //二维码的高度 imgWidth: width / 6, //图片宽 imgHeight: height / 6, //图片高 src: src //图片中央的二维码 }); } var url = 'https://api.gzkny.com/h5/aa.html?openid=' + openid; createQRCode("qrcode", url, 80, 80, "image/follow.jpg");*/ /*使用html2canvas 转换html为canvas 安卓html2canvas方法*/ function downloadForJS(src) { html2canvas(document.body, { useCORS: true, logging: true, allowTaint: false, //允许跨域（图片跨域相关） }).then(function(canvas) { var imgUri = canvas.toDataURL().replace("image/png", "image/octet-stream"); // 获取生成的图片的url // console.log(imgUri) console.log('完成') $('.image').html('<img src="' + imgUri + '"/>') }); } /** * 将图片转换为base64 * 解决html2canvas跨域合成失败的问题 */ /*第一种方法*/ function getBase64Image(img) { var canvas = document.createElement("canvas"); canvas.width = img.width; canvas.height = img.height; var ctx = canvas.getContext("2d"); ctx.drawImage(img, 0, 0, img.width, img.height); var dataURL = canvas.toDataURL("image/png"); // 可选其他值 image/jpeg return dataURL; } function main(src, cb) { var image = new Image(); image.src = src + '?v=' + Math.random(); // 处理缓存 image.crossOrigin = "anonymous"; // 支持跨域图片 image.setAttribute('crossorigin', ' *' ) // 支持跨域图片 image.onload = function() { var base64 = getBase64Image(image); cb && cb(base64); } } /*第二种方法*/ function getBase64ByUrl(src, callback, outputFormat) { var xhr = new XMLHttpRequest(); xhr.open('GET', src, true); xhr.responseType = 'arraybuffer'; xhr.onload = function(e) { if(xhr.status == 200) { var uInt8Array = new Uint8Array(xhr.response); var i = uInt8Array.length; var binaryString = new Array(i); while(i--) { binaryString[i] = String.fromCharCode(uInt8Array[i]); } var data = binaryString.join(''); var base64 = window.btoa(data); var dataUrl = "data:" + (outputFormat || "image/png") + ";base64," + base64; console.log(dataUrl) callback.call(this, dataUrl); } }; xhr.send(); } /*第三种方法*/ function getBase64(imgUrl) { window.URL = window.URL || window.webkitURL; var xhr = new XMLHttpRequest(); xhr.open("get", imgUrl, true); // 至关重要 xhr.responseType = "blob"; xhr.onload = function() { if(this.status == 200) { //得到一个blob对象 var blob = this.response; console.log("blob", blob) // 至关重要 let oFileReader = new FileReader(); oFileReader.onloadend = function(e) { let base64 = e.target.result; console.log("方式一》》》》》》》》》", base64) }; oFileReader.readAsDataURL(blob); //====为了在页面显示图片，可以删除==== var img = document.createElement("img"); img.onload = function(e) { window.URL.revokeObjectURL(img.src); // 清除释放 }; let src = window.URL.createObjectURL(blob); img.src = src document.getElementById("container1").appendChild(img); //====为了在页面显示图片，可以删除==== } } xhr.send(); } // 获取二维码URL $.ajax({ method: 'GET', url: window.BASE_URL + 'wx/accessToken', contentType: 'application/x-www-form-urlencoded', async: false, dataType: "json", data: { openid: openid }, success: function(data) { console.log(data) // $('.butright_img').attr('src', 'http://res.gzkny.com/9fdd7a57-3b4e-4c71-9aa9-ba28e766ed4c.jpg') // $('#qrcode').html('<img src="' + data.data.url + '"/>') // getBase64ByUrl('http://res.gzkny.com/9fdd7a57-3b4e-4c71-9aa9-ba28e766ed4c.jpg') // getBase64('http://res.gzkny.com/9fdd7a57-3b4e-4c71-9aa9-ba28e766ed4c.jpg') /*图片可能会跨域 把图片url转为base64*/ main(data.data.url, function(base64) { console.log(base64) $('.codebotom').html('<img class="butright_img" src="' + base64 + '"/>') }); // 获取数据 $.ajax({ method: 'GET', url: window.BASE_URL + 'api/v1/member/get', contentType: 'application/x-www-form-urlencoded', async: false, dataType: "json", data: { access_token: access_token, }, success: function(data) { console.log(data) if(data.error == 'success') { $('.state').html(data.data.username) /*执行代码转海报*/ setTimeout(function() { downloadForJS() }, 1000) } } }); } }); }) </script> </html>
ios系统dom-to-image方法
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>分享</title> <script src="js/jquery-2.1.4.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript" src="js/dom-to-image.js"></script> <script type="text/javascript" src="js/FileSaver.js"></script> <style type="text/css"> /*头部*/ * { margin: 0px; padding: 0px; } body { background: #45A196; 100%; height: 100%; } .container { max- 750px; min- 32px; margin: 0 auto; position: relative; } .imge { position: relative; max- 750px; min- 32px; 100%; height: 100%; z-index: 99; } .left { position: absolute; left: 12%; margin-top: 116%; color: #FFFFFF; font-size: 26px; letter-spacing: 5px; } .bottom { position: absolute; } .codebotom { position: absolute; background: #FFFFFF; 90px; height: 90px; } .butright_img { position: absolute; 80px; height: 80px; margin: 5px; top: 0px; left: 0px; } .textbottom { position: absolute; 50px; letter-spacing: 5px; color: #FFFFFF; top: 15px; left: -45px; } .butright { position: fixed; bottom: 0px; right: 40%; z-index: 9999; color: #ffffff; } .image { display: block; max- 750px; min- 32px; 100%; position: absolute; top: 0px; left: 0px; background: #FFFFFF; z-index: 9999; } </style> </head> <body> <div id="container"> <div class="container"> <div class="imge"> <img style=" 100% ; position: absolute;" src="codeimg/code.jpg" /> <div class="left state"></div> <div style=" position: absolute;right: 38%; margin-top: 110%;"> <div class="bottom"> <div class="textbottom">扫码立即注册</div> <div class="codebotom" id="codebotom"> <!--<div id="qrcode" class="butright_img"></div>--> </div> </div> </div> </div> </div> <div class="butright">长按保存图片</div> </div> <div class="bot" style="position: fixed; z-index: 9999999999999999;"></div> </body> <!--二维码--> <script src="js/jquery.qrcode.logo.min.js" type="text/javascript" charset="utf-8"></script> <script src="js/config.js"></script> <script type="text/javascript"> $(function() { var openid_list = eval(decodeURIComponent(localStorage.getItem("openid"))) var openid = openid_list[1] var access_token = openid_list[0] window.history.pushState(null, null, "#"); window.addEventListener('popstate', function(e) { window.location.href = 'my.html' }, false); //创建二维码 /*function createQRCode(id, url, width, height, src) { $('#' + id).empty(); jQuery('#' + id).qrcode({ render: 'canvas', text: url, width, //二维码的宽度 height: height, //二维码的高度 imgWidth: width / 6, //图片宽 imgHeight: height / 6, //图片高 src: src //图片中央的二维码 }); } var url = 'https://api.gzkny.com/h5/aa.html?openid=' + openid; createQRCode("qrcode", url, 80, 80, "image/follow.jpg");*/ /*ios系统dom-to-image方法*/ function downloadForJS() { domtoimage.toSvg(document.getElementById('container')) .then(function(dataUrl) { /* do something */ var img = new Image(); img.src = dataUrl; $('.container').hide() // console.log(dataUrl) console.log('完成') // document.body.appendChild(img); $('.bot').html(img) }); } /** * 将图片转换为base64 * 解决html2canvas跨域合成失败的问题 * ios将图片转换为base64 */ function getBase64Image(img) { var canvas = document.createElement("canvas"); canvas.width = img.width; canvas.height = img.height; var ctx = canvas.getContext("2d"); ctx.drawImage(img, 0, 0, img.width, img.height); var ext = img.src.substring(img.src.lastIndexOf(".") + 1).toLowerCase(); var dataURL = canvas.toDataURL("image/" + ext); return dataURL; } function ios(img) { var image = new Image(); image.crossOrigin = ''; image.src = img; image.onload = function() { var base64 = getBase64Image(image); console.log(base64); $('.codebotom').html('<img class="butright_img" src="' + base64 + '"/>') } } // 禁止屏幕滑动 function bodyScroll(event) { event.preventDefault(); } document.body.addEventListener('touchmove', bodyScroll, false); $('body').css({ 'position': 'fixed', "width": "100%" }); // 获取数据 $.ajax({ method: 'GET', url: window.BASE_URL + 'wx/accessToken', contentType: 'application/x-www-form-urlencoded', async: false, dataType: "json", data: { openid: openid }, success: function(data) { console.log(data) /*ios将图片转换为base64*/ ios(data.data.url) // 获取数据 $.ajax({ method: 'GET', url: window.BASE_URL + 'api/v1/member/get', contentType: 'application/x-www-form-urlencoded', async: false, dataType: "json", data: { access_token: access_token, }, success: function(data) { console.log(data) if(data.error == 'success') { $('.state').html(data.data.username) /*ios系统dom-to-image方法*/ setTimeout(function() { downloadForJS() }, 1000) } } }); } }); }) </script> </html>
不是太懂的可以留言