PC端上传文件多半用插件,引入flash都没关系,但是移动端要是还用各种冗余的插件估计得被喷死,项目里面需要做图片上传的功能,既然H5已经有相关的接口且兼容性良好,当然优先考虑用H5来实现。
用的技术主要是:
HTML结构:
<div class="camera-area"> <form enctype="multipart/form-data" method="post"><input type="file" name="fileToUpload" class="fileToUpload" accept="image/*" capture="camera"/> <div class="upload-progress"><span></span></div></form> <div class="thumb"></div> </div>
已经封装好的upload.js,依赖zepto
(function($) { $.extend($.fn, {fileUpload: function(opts) { this.each(function() {var $self = $(this);var doms = { "fileToUpload": $self.find(".fileToUpload"), "thumb": $self.find(".thumb"), "progress": $self.find(".upload-progress")};var funs = { //选择文件,获取文件大小,也可以在这里获取文件格式,限制用户上传非要求格式的文件 "fileSelected": function() {var files = (doms.fileToUpload)[0].files;var count = files.length;for (var index = 0; index < count; index++) { var file = files[index]; var fileSize = 0; if (file.size > 1024 * 1024)fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + "MB"; elsefileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + "KB";}funs.uploadFile(); }, //异步上传文件 uploadFile: function() {var fd = new FormData();//创建表单数据对象var files = (doms.fileToUpload)[0].files;var count = files.length;for (var index = 0; index < count; index++) { var file = files[index]; fd.append(opts.file, file);//将文件添加到表单数据中 funs.previewImage(file);//上传前预览图片,也可以通过其他方法预览txt}var xhr = new XMLHttpRequest();xhr.upload.addEventListener("progress", funs.uploadProgress, false);//监听上传进度xhr.addEventListener("load", funs.uploadComplete, false);xhr.addEventListener("error", opts.uploadFailed, false);xhr.open("POST", opts.url);xhr.send(fd); }, //文件预览 previewImage: function(file) {var gallery = doms.thumb;var img = document.createElement("img");img.file = file;doms.thumb.html(img);// 使用FileReader方法显示图片内容var reader = new FileReader();reader.onload = (function(aImg) { return function(e) {aImg.src = e.target.result; };})(img);reader.readAsDataURL(file); }, uploadProgress: function(evt) {if (evt.lengthComputable) { var percentComplete = Math.round(evt.loaded * 100 / evt.total); doms.progress.html(percentComplete.toString() + "%");} }, "uploadComplete": function(evt) {alert(evt.target.responseText) }};doms.fileToUpload.on("change", function() { doms.progress.find("span").width("0"); funs.fileSelected();}); });} });})(Zepto);调用方法:
$(".camera-area").fileUpload({"url": "savetofile.php","file": "myFile" });PHP部分:
<?phpif (isset($_FILES["myFile"])) {// Example:writeLog($_FILES);move_uploaded_file($_FILES["myFile"]["tmp_name"], "uploads/" . $_FILES["myFile"]["name"]);echo "successful";}function writeLog($log){if(is_array($log) || is_object($log)){$log = json_encode($log);}$log = $log."
";file_put_contents("log.log", $log,FILE_APPEND);}?>希望本文所述对大家学习有所帮助。