Baru-baru ini, adalah perlu untuk membuka kaedah perkongsian WeChat apl ke paparan web Apabila ia datang kepada gambar yang dikongsi, jika sambungan melalui penghantaran gambar, fail gambar akan diambil semula di latar belakang, yang akan menjejaskan. kelajuan. Saya memilih webview untuk mengekod imej dalam kaedah base64 untuk menghantarnya ke aplikasi tempatan. Berikut ialah kod rujukan untuk pelaksanaan:
<!DOCTYPE html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Image to Base64 - jsFiddle demo by handtrix</title> <script type='text/javascript' src='//code.jquery.com/jquery-2.0.2.js'></script> <link rel="stylesheet" type="text/css" href="/css/result-light.css" rel="external nofollow" > <style type='text/css'> @import url('//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css'); body{ padding: 20px; } </style> <script type='text/javascript'>//<![CDATA[ $(window).load(function(){ /** * convertImgToBase64 * @param {String} url * @param {Function} callback * @param {String} [outputFormat='image/png'] * @author HaNdTriX * @example convertImgToBase64('http://goo.gl/AOxHAL', function(base64Img){ console.log('IMAGE:',base64Img); }) */ function convertImgToBase64(url, callback, outputFormat){ var canvas = document.createElement('CANVAS'); var ctx = canvas.getContext('2d'); var img = new Image; img.crossOrigin = 'Anonymous'; img.onload = function(){ canvas.height = img.height; canvas.width = img.width; ctx.drawImage(img,0,0); var dataURL = canvas.toDataURL(outputFormat || 'image/png'); callback.call(this, dataURL); // Clean up canvas = null; }; img.src = url; } $('#img2b64').submit(function(event){ var imageUrl = $(this).find('input[name=url]').val(); console.log('imageUrl', imageUrl); convertImgToBase64(imageUrl, function(base64Img){ $('.output') .find('textarea') .val(base64Img) .end() .find('a') .attr('href', base64Img) .text(base64Img) .end() .find('img') .attr('src', base64Img); }); event.preventDefault(); }); });//]]> </script> </head> <body> <h2>Input</h2> <form class="input-group" id="img2b64"> <input type="url" name="url" class="form-control" placeholder="Insert an IMAGE-URL" value="http://upload.wikimedia.org/wikipedia/commons/4/4a/Logo_2013_Google.png" required> <span class="input-group-btn"> <input type="submit" class="btn btn-default"> </span> </form> <hr> <h2>Output</h2> <div class="output"> <textarea class="form-control"></textarea><br> <a></a><br><br> <img><br> </div> </body> </html>