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：
ajax
FileReader
FormData
HTML结构：
XML/HTML Code复制内容到剪贴板
- <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
JavaScript Code复制内容到剪贴板
- (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 = {
-
- "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';
- else
- fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';
- }
- funs.uploadFile();
- },
-
- uploadFile: function() {
- var fd = new FormData();
- 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);
- funs.previewImage(file);
- }
- var xhr = new XMLHttpRequest();
- xhr.upload.addEventListener("progress", funs.uploadProgress, false);
- xhr.addEventListener("load", funs.uploadComplete, false);
- xhr.addEventListener("error", opts.uploadFailed, false);
- xhr.open("POST", opts.url);
- xhr.send(fd);
- },
-
- previewImage: function(file) {
- var gallery = doms.thumb;
- var img = document.createElement("img");
- img.file = file;
- doms.thumb.html(img);
-
- 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：
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- $(".camera-area").fileUpload({
- "url": "savetofile.php",
- "file": "myFile"
- });
PHP部分：
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- <?php
- if (isset($_FILES['myFile'])) {
-
- 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."\r\n";
-
- file_put_contents('log.log', $log,FILE_APPEND);
- }
- ?>
以上就是本文的全部内容，希望对大家的学习有所帮助。
原文：http://www.cnblogs.com/hutuzhu/p/5254532.html
