cropbox.js 是一个实现了图像在线剪裁的 jQuery 、YUI 插件和 JavaScript 库。
上DEMO：
上传的图片可以使用滚轮放大与缩小当前选择的图片，后点击“裁切”后，在右侧的预览图中可以看到裁切成不同尺寸的图片缩略图。
本 demo 使用的 cropbox.js 的版本为：
"use strict"; (function (factory) { if (typeof define === 'function' && define.amd) { define(['jquery'], factory); } else { factory(jQuery); } }(function ($) { var cropbox = function(options, el){ var el = el || $(options.imageBox), obj = { state : {}, ratio : 1, options : options, imageBox : el, thumbBox : el.find(options.thumbBox), spinner : el.find(options.spinner), image : new Image(), getDataURL: function () { var width = this.thumbBox.width(), height = this.thumbBox.height(), canvas = document.createElement("canvas"), dim = el.css('background-position').split(' '), size = el.css('background-size').split(' '), dx = parseInt(dim[0]) - el.width()/2 + width/2, dy = parseInt(dim[1]) - el.height()/2 + height/2, dw = parseInt(size[0]), dh = parseInt(size[1]), sh = parseInt(this.image.height), sw = parseInt(this.image.width); canvas.width = width; canvas.height = height; var context = canvas.getContext("2d"); context.drawImage(this.image, 0, 0, sw, sh, dx, dy, dw, dh); var imageData = canvas.toDataURL('image/png'); return imageData; }, getBlob: function() { var imageData = this.getDataURL(); var b64 = imageData.replace('data:image/png;base64,',''); var binary = atob(b64); var array = []; for (var i = 0; i < binary.length; i++) { array.push(binary.charCodeAt(i)); } return new Blob([new Uint8Array(array)], {type: 'image/png'}); }, zoomIn: function () { this.ratio*=1.1; setBackground(); }, zoomOut: function () { this.ratio*=0.9; setBackground(); } }, setBackground = function() { var w = parseInt(obj.image.width)*obj.ratio; var h = parseInt(obj.image.height)*obj.ratio; var pw = (el.width() - w) / 2; var ph = (el.height() - h) / 2; el.css({ 'background-image': 'url(' + obj.image.src + ')', 'background-size': w +'px ' + h + 'px', 'background-position': pw + 'px ' + ph + 'px', 'background-repeat': 'no-repeat'}); }, imgMouseDown = function(e) { e.stopImmediatePropagation(); obj.state.dragable = true; obj.state.mouseX = e.clientX; obj.state.mouseY = e.clientY; }, imgMouseMove = function(e) { e.stopImmediatePropagation(); if (obj.state.dragable) { var x = e.clientX - obj.state.mouseX; var y = e.clientY - obj.state.mouseY; var bg = el.css('background-position').split(' '); var bgX = x + parseInt(bg[0]); var bgY = y + parseInt(bg[1]); el.css('background-position', bgX +'px ' + bgY + 'px'); obj.state.mouseX = e.clientX; obj.state.mouseY = e.clientY; } }, imgMouseUp = function(e) { e.stopImmediatePropagation(); obj.state.dragable = false; }, zoomImage = function(e) { e.originalEvent.wheelDelta > 0 || e.originalEvent.detail < 0 ? obj.ratio*=1.1 : obj.ratio*=0.9; setBackground(); } obj.spinner.show(); obj.image.onload = function() { obj.spinner.hide(); setBackground(); el.bind('mousedown', imgMouseDown); el.bind('mousemove', imgMouseMove); $(window).bind('mouseup', imgMouseUp); el.bind('mousewheel DOMMouseScroll', zoomImage); }; obj.image.src = options.imgSrc; el.on('remove', function(){$(window).unbind('mouseup', imgMouseUp)}); return obj; }; jQuery.fn.cropbox = function(options){ return new cropbox(options, this); }; }));
cropbox.js 可以从上面这个使用方法中下载，根据需要可以下载不同版本的 cropbox.js，在下面的 demo 中将不再描述下载地址。
下面是这个demo的 html / css / js 文件结构：
cropbox
- css
rest.css
index.css
- js
cropbox.js
jquery-1.11.1.min.js /*经过测试，只能使用这个版本的 jquey，还没找到原因*/
img
koala.jpg /*默认显示的图片*/
index.html
HTML：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" /> <title>在线图片裁切</title> <!--rest.css--> <link rel="stylesheet" href="../rest-css/rest.css" /> <link rel="stylesheet" href="index.css" /> </head> <body> <div class="container"> <div class="row"> <div class="col-md-8"> <div class="img-box"> <div class="thumb-box"></div> <div class="spinner"></div> </div> <div class="action"> <div id="file" class="new-contentarea tc"> <a href="javascript:void(0)" class="upload-img"> <label for="upload-file">上传图像</label> </a> <input type="file" class="" name="upload-file" id="upload-file"> </div> <input type="button" id="btnCrop" class="btn-crop" value="裁切" /> <input type="button" id="btnZoomIn" class="btn-zoom-in" value="-" /> <input type="button" id="btnZoomOut" class="btn-zoom-out" value="+" /> </div> </div> <div class="col-md-4"> <div class="cropped"></div> </div> </div> <script src="js/jquery-1.11.1.min.js" type="text/javascript"></script> <!--cropbox.js 是一个实现了图像在线剪裁的 jQuery 、YUI 插件和 JavaScript 库。--> <script type="text/javascript" src="js/cropbox.js"></script> </body> </html>
在 rest.css 中，把 bootstrap.css 中的部分 css 提取出来，为了减少文件的大小，并没有全部加载。主要把 媒体查询 及 栅格系统中所有用到的类名提取，并把其它的默认的样式统一放在这个 css 文件中。
/** * rest css */ *{ margin: 0; padding: 0; } *:after, *:before{ -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } .clearfix:before, .clearfix:after, body:before, row:before, row:after{ content: ""; display: table; } ul>li{ list-style: none; } body{ font-family: "微软雅黑";,"Segoe UI", "Lucida Grande", Helvetica, Arial,sans-serif; font-size: 14px; line-height: 1.42857143; color: #333; } html,body{ width: 100%; height: 100%; } a{ color: rgba(255,255,255,0.6); outline: none; text-decoration: none; -webkit-transition: 0.2s; transition: 0.2s; } a:hover, a:focus{ color: #74777b; text-decoration: none; } /** * .container 响应式布局 * .container-fluid 流式布局 * */ .container{ padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto; } @media(min- 768px) { .container{ width: 750px; } } @media(min- 922px) { .container{ width: 970px; } } @media(min- 1200px) { .container{ width: 1170px; } } .container-fluid{ margin-right: auto; margin-left: auto; padding-left: 15px; padding-right: 15px; } .row{ margin-right: -15px; margin-left: -15px; display: inline-flex; display: -webkit-box; /*定义老版本flex*/ display: -moz-box; display: -webkit-flex; display: -ms-flexbox; display: flex;/*定义flex*/ } .col-xs-1, .col-sm-1, .col-md-1, .col-lg-1, .col-xs-2, .col-sm-2, .col-md-2, .col-lg-2, .col-xs-3, .col-sm-3, .col-md-3, .col-lg-3, .col-xs-4, .col-sm-4, .col-md-4, .col-lg-4, .col-xs-5, .col-sm-5, .col-md-5, .col-lg-5, .col-xs-6, .col-sm-6, .col-md-6, .col-lg-6, .col-xs-7, .col-sm-7, .col-md-7, .col-lg-7, .col-xs-8, .col-sm-8, .col-md-8, .col-lg-8, .col-xs-9, .col-sm-9, .col-md-9, .col-lg-9, .col-xs-10, .col-sm-10, .col-md-10, .col-lg-10, .col-xs-11, .col-sm-11, .col-md-11, .col-lg-11, .col-xs-12, .col-sm-12, .col-md-12, .col-lg-12 { position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; } .col-xs-1, .col-xs-2, .col-xs-3, .col-xs-4, .col-xs-5, .col-xs-6, .col-xs-7, .col-xs-8, .col-xs-9, .col-xs-10, .col-xs-11, .col-xs-12 { float: left; } .col-xs-12 { width: 100%; } .col-xs-11 { width: 91.66666667%; } .col-xs-10 { width: 83.33333333%; } .col-xs-9 { width: 75%; } .col-xs-8 { width: 66.66666667%; } .col-xs-7 { width: 58.33333333%; } .col-xs-6 { width: 50%; } .col-xs-5 { width: 41.66666667%; } .col-xs-4 { width: 33.33333333%; } .col-xs-3 { width: 25%; } .col-xs-2 { width: 16.66666667%; } .col-xs-1 { width: 8.33333333%; } .col-xs-pull-12 { right: 100%; } .col-xs-pull-11 { right: 91.66666667%; } .col-xs-pull-10 { right: 83.33333333%; } .col-xs-pull-9 { right: 75%; } .col-xs-pull-8 { right: 66.66666667%; } .col-xs-pull-7 { right: 58.33333333%; } .col-xs-pull-6 { right: 50%; } .col-xs-pull-5 { right: 41.66666667%; } .col-xs-pull-4 { right: 33.33333333%; } .col-xs-pull-3 { right: 25%; } .col-xs-pull-2 { right: 16.66666667%; } .col-xs-pull-1 { right: 8.33333333%; } .col-xs-pull-0 { right: auto; } .col-xs-push-12 { left: 100%; } .col-xs-push-11 { left: 91.66666667%; } .col-xs-push-10 { left: 83.33333333%; } .col-xs-push-9 { left: 75%; } .col-xs-push-8 { left: 66.66666667%; } .col-xs-push-7 { left: 58.33333333%; } .col-xs-push-6 { left: 50%; } .col-xs-push-5 { left: 41.66666667%; } .col-xs-push-4 { left: 33.33333333%; } .col-xs-push-3 { left: 25%; } .col-xs-push-2 { left: 16.66666667%; } .col-xs-push-1 { left: 8.33333333%; } .col-xs-push-0 { left: auto; } .col-xs-offset-12 { margin-left: 100%; } .col-xs-offset-11 { margin-left: 91.66666667%; } .col-xs-offset-10 { margin-left: 83.33333333%; } .col-xs-offset-9 { margin-left: 75%; } .col-xs-offset-8 { margin-left: 66.66666667%; } .col-xs-offset-7 { margin-left: 58.33333333%; } .col-xs-offset-6 { margin-left: 50%; } .col-xs-offset-5 { margin-left: 41.66666667%; } .col-xs-offset-4 { margin-left: 33.33333333%; } .col-xs-offset-3 { margin-left: 25%; } .col-xs-offset-2 { margin-left: 16.66666667%; } .col-xs-offset-1 { margin-left: 8.33333333%; } .col-xs-offset-0 { margin-left: 0%; } @media (min- 768px) { .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12 { float: left; } .col-sm-12 { width: 100%; } .col-sm-11 { width: 91.66666667%; } .col-sm-10 { width: 83.33333333%; } .col-sm-9 { width: 75%; } .col-sm-8 { width: 66.66666667%; } .col-sm-7 { width: 58.33333333%; } .col-sm-6 { width: 50%; } .col-sm-5 { width: 41.66666667%; } .col-sm-4 { width: 33.33333333%; } .col-sm-3 { width: 25%; } .col-sm-2 { width: 16.66666667%; } .col-sm-1 { width: 8.33333333%; } .col-sm-pull-12 { right: 100%; } .col-sm-pull-11 { right: 91.66666667%; } .col-sm-pull-10 { right: 83.33333333%; } .col-sm-pull-9 { right: 75%; } .col-sm-pull-8 { right: 66.66666667%; } .col-sm-pull-7 { right: 58.33333333%; } .col-sm-pull-6 { right: 50%; } .col-sm-pull-5 { right: 41.66666667%; } .col-sm-pull-4 { right: 33.33333333%; } .col-sm-pull-3 { right: 25%; } .col-sm-pull-2 { right: 16.66666667%; } .col-sm-pull-1 { right: 8.33333333%; } .col-sm-pull-0 { right: auto; } .col-sm-push-12 { left: 100%; } .col-sm-push-11 { left: 91.66666667%; } .col-sm-push-10 { left: 83.33333333%; } .col-sm-push-9 { left: 75%; } .col-sm-push-8 { left: 66.66666667%; } .col-sm-push-7 { left: 58.33333333%; } .col-sm-push-6 { left: 50%; } .col-sm-push-5 { left: 41.66666667%; } .col-sm-push-4 { left: 33.33333333%; } .col-sm-push-3 { left: 25%; } .col-sm-push-2 { left: 16.66666667%; } .col-sm-push-1 { left: 8.33333333%; } .col-sm-push-0 { left: auto; } .col-sm-offset-12 { margin-left: 100%; } .col-sm-offset-11 { margin-left: 91.66666667%; } .col-sm-offset-10 { margin-left: 83.33333333%; } .col-sm-offset-9 { margin-left: 75%; } .col-sm-offset-8 { margin-left: 66.66666667%; } .col-sm-offset-7 { margin-left: 58.33333333%; } .col-sm-offset-6 { margin-left: 50%; } .col-sm-offset-5 { margin-left: 41.66666667%; } .col-sm-offset-4 { margin-left: 33.33333333%; } .col-sm-offset-3 { margin-left: 25%; } .col-sm-offset-2 { margin-left: 16.66666667%; } .col-sm-offset-1 { margin-left: 8.33333333%; } .col-sm-offset-0 { margin-left: 0%; } } @media (min- 992px) { .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12 { float: left; } .col-md-12 { width: 100%; } .col-md-11 { width: 91.66666667%; } .col-md-10 { width: 83.33333333%; } .col-md-9 { width: 75%; } .col-md-8 { width: 66.66666667%; } .col-md-7 { width: 58.33333333%; } .col-md-6 { width: 50%; } .col-md-5 { width: 41.66666667%; } .col-md-4 { width: 33.33333333%; } .col-md-3 { width: 25%; } .col-md-2 { width: 16.66666667%; } .col-md-1 { width: 8.33333333%; } .col-md-pull-12 { right: 100%; } .col-md-pull-11 { right: 91.66666667%; } .col-md-pull-10 { right: 83.33333333%; } .col-md-pull-9 { right: 75%; } .col-md-pull-8 { right: 66.66666667%; } .col-md-pull-7 { right: 58.33333333%; } .col-md-pull-6 { right: 50%; } .col-md-pull-5 { right: 41.66666667%; } .col-md-pull-4 { right: 33.33333333%; } .col-md-pull-3 { right: 25%; } .col-md-pull-2 { right: 16.66666667%; } .col-md-pull-1 { right: 8.33333333%; } .col-md-pull-0 { right: auto; } .col-md-push-12 { left: 100%; } .col-md-push-11 { left: 91.66666667%; } .col-md-push-10 { left: 83.33333333%; } .col-md-push-9 { left: 75%; } .col-md-push-8 { left: 66.66666667%; } .col-md-push-7 { left: 58.33333333%; } .col-md-push-6 { left: 50%; } .col-md-push-5 { left: 41.66666667%; } .col-md-push-4 { left: 33.33333333%; } .col-md-push-3 { left: 25%; } .col-md-push-2 { left: 16.66666667%; } .col-md-push-1 { left: 8.33333333%; } .col-md-push-0 { left: auto; } .col-md-offset-12 { margin-left: 100%; } .col-md-offset-11 { margin-left: 91.66666667%; } .col-md-offset-10 { margin-left: 83.33333333%; } .col-md-offset-9 { margin-left: 75%; } .col-md-offset-8 { margin-left: 66.66666667%; } .col-md-offset-7 { margin-left: 58.33333333%; } .col-md-offset-6 { margin-left: 50%; } .col-md-offset-5 { margin-left: 41.66666667%; } .col-md-offset-4 { margin-left: 33.33333333%; } .col-md-offset-3 { margin-left: 25%; } .col-md-offset-2 { margin-left: 16.66666667%; } .col-md-offset-1 { margin-left: 8.33333333%; } .col-md-offset-0 { margin-left: 0%; } } @media (min- 1200px) { .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12 { float: left; } .col-lg-12 { width: 100%; } .col-lg-11 { width: 91.66666667%; } .col-lg-10 { width: 83.33333333%; } .col-lg-9 { width: 75%; } .col-lg-8 { width: 66.66666667%; } .col-lg-7 { width: 58.33333333%; } .col-lg-6 { width: 50%; } .col-lg-5 { width: 41.66666667%; } .col-lg-4 { width: 33.33333333%; } .col-lg-3 { width: 25%; } .col-lg-2 { width: 16.66666667%; } .col-lg-1 { width: 8.33333333%; } .col-lg-pull-12 { right: 100%; } .col-lg-pull-11 { right: 91.66666667%; } .col-lg-pull-10 { right: 83.33333333%; } .col-lg-pull-9 { right: 75%; } .col-lg-pull-8 { right: 66.66666667%; } .col-lg-pull-7 { right: 58.33333333%; } .col-lg-pull-6 { right: 50%; } .col-lg-pull-5 { right: 41.66666667%; } .col-lg-pull-4 { right: 33.33333333%; } .col-lg-pull-3 { right: 25%; } .col-lg-pull-2 { right: 16.66666667%; } .col-lg-pull-1 { right: 8.33333333%; } .col-lg-pull-0 { right: auto; } .col-lg-push-12 { left: 100%; } .col-lg-push-11 { left: 91.66666667%; } .col-lg-push-10 { left: 83.33333333%; } .col-lg-push-9 { left: 75%; } .col-lg-push-8 { left: 66.66666667%; } .col-lg-push-7 { left: 58.33333333%; } .col-lg-push-6 { left: 50%; } .col-lg-push-5 { left: 41.66666667%; } .col-lg-push-4 { left: 33.33333333%; } .col-lg-push-3 { left: 25%; } .col-lg-push-2 { left: 16.66666667%; } .col-lg-push-1 { left: 8.33333333%; } .col-lg-push-0 { left: auto; } .col-lg-offset-12 { margin-left: 100%; } .col-lg-offset-11 { margin-left: 91.66666667%; } .col-lg-offset-10 { margin-left: 83.33333333%; } .col-lg-offset-9 { margin-left: 75%; } .col-lg-offset-8 { margin-left: 66.66666667%; } .col-lg-offset-7 { margin-left: 58.33333333%; } .col-lg-offset-6 { margin-left: 50%; } .col-lg-offset-5 { margin-left: 41.66666667%; } .col-lg-offset-4 { margin-left: 33.33333333%; } .col-lg-offset-3 { margin-left: 25%; } .col-lg-offset-2 { margin-left: 16.66666667%; } .col-lg-offset-1 { margin-left: 8.33333333%; } .col-lg-offset-0 { margin-left: 0%; } }
这个 demo 的其它样式，主要是 input[type]的个性化样式：
/** * 页面部分 */ .img-box{ position: relative; height: 400px; width: 400px; border: 1px solid #aaa; overflow: hidden; background-repeat: no-repeat; cursor: move;/*可移动的鼠标指针*/ } .img-box .thumb-box{ position: absolute; top: 50%; left: 50%; width: 200px; height: 200px; margin-top: -100px; margin-left: -100px; box-sizing: border-box; border: 1px solid rgb(102, 102, 102); box-shadow: 0 0 0 1000px rgba(0, 0, 0, 0.5); background: none repeat scroll 0% 0% transparent;/*如果一个元素覆盖在另外一个元素之上，而你想显示下面的元素，这时你就需要把上面这个元素的background设置transparent*/ } .img-box .spinner{ position: absolute; top: 0; left: 0; bottom: 0; right: 0; text-align: center; line-height: 400px; background: rgba(0,0,0,0.7); } .action{ height: 45px; margin-top: 15px; } .tc{ text-align: center; cursor: pointer; } /*input[typw] 上传文件按钮*/ .new-contentarea{ width: 165px; overflow: hidden; margin: 0 auto; position: relative; float: left; margin-right: 21px; } .new-contentarea .upload-img{ width: 165px; display: inline-block; margin-bottom: 10px; height: 57px; line-height: 57px; font-size: 20px; color: #FFFFFF; background-color: #f38e81; border-radius: 3px; text-decoration: none; cursor: pointer; border: 0px #fff solid; box-shadow: 0px 0px 5px #B0B0B0; } .new-contentarea .upload-img:hover{ background-color: #d6796d; } .new-contentarea input[type=file]{ width: 188px; height: 60px; background: #333; margin: 0 auto; position: absolute; right: 50%; margin-right: -94px; top: 0; right/***/: 0px9; margin-right/***/: 0px9; width/***/: 10px9; opacity: 0; filter: alpha(opacity=0); z-index: 2; cursor: pointer; } .action .btn-zoom-in, .action .btn-zoom-out, .action .btn-crop { width: 66px; display: inline-block; margin-bottom: 10px; height: 57px; line-height: 57px; font-size: 20px; color: #FFFFFF; margin: 0px 2px; background-color: #f38e81; border-radius: 3px; text-decoration: none; cursor: pointer; box-shadow: 0px 0px 5px #B0B0B0; border: 0px #fff solid; margin-bottom: 10px; } .cropped{ width: 200px; border: 1px #ddd solid; height: 460px; padding: 4px; box-shadow: 0px 0px 12px #ddd; text-align: center; }
下面是这个 demo 的实现方法：
<script type="text/javascript"> $(window).load(function() {
//options 是首次加载显示的默认的图片样式 var options = { thumbBox: '.thumb-box', spinner: '.spinner', imgSrc: './img/koala.jpg' }
var cropper = $('.img-box').cropbox(options); $('#upload-file').on('change', function() { var reader = new FileReader(); reader.onload = function(e) { options.imgSrc = e.target.result; cropper = $('.img-box').cropbox(options); } reader.readAsDataURL(this.files[0]); this.files = []; }) $('#btnCrop').on('click', function() { var img = cropper.getDataURL(); $('.cropped').html(''); $('.cropped').append('<img src="' + img + '" align="absmiddle" style="64px;margin-top:4px;border-radius:64px;box-shadow:0px 0px 12px #7E7E7E;" ><p>64px*64px</p>'); $('.cropped').append('<img src="' + img + '" align="absmiddle" style="128px;margin-top:4px;border-radius:128px;box-shadow:0px 0px 12px #7E7E7E;"><p>128px*128px</p>'); $('.cropped').append('<img src="' + img + '" align="absmiddle" style="180px;margin-top:4px;border-radius:180px;box-shadow:0px 0px 12px #7E7E7E;"><p>180px*180px</p>'); }) $('#btnZoomIn').on('click', function() {
//鼠标滚轮缩小 cropper.zoomIn(); }) $('#btnZoomOut').on('click', function() {
//鼠标滚轮放大 cropper.zoomOut(); }) }); </script>
下面这个 demo 因为 jsfiddle 加载外部的JS时，必须是 https，但是 cropbox.js 暂时不知道怎么加载进来，因此看不到它的具体效果，请知道的大侠们指点：
在这个 demo 中，有两个知识点：
- css 中 ：background: none repeat scroll 0% 0% transparent;/*如果一个元素覆盖在另外一个元素之上，而你想显示下面的元素，这时你就需要把上面这个元素的background设置transparent*/
- input[type=file] 样式美化，在说它的美化前，需要把它的结构了解清楚
/*input file上传按钮的美化思路是，先把之前的按钮透明度opacity设置为0,然后，外层用div包裹，就实现了美化功能。*/ <div id="file" class="new-contentarea tc"> <a href="javascript:void(0)" class="upload-img"> <label for="upload-file">上传图像</label> </a> <input type="file" class="" name="upload-file" id="upload-file"> </div>
.tc{ text-align: center; cursor: pointer; } /*input[typw] 上传文件按钮*/ .new-contentarea{ width: 165px; overflow: hidden; margin: 0 auto; position: relative; float: left; margin-right: 21px; } .new-contentarea .upload-img{ width: 165px; display: inline-block; margin-bottom: 10px; height: 57px; line-height: 57px; font-size: 20px; color: #FFFFFF; background-color: #f38e81; border-radius: 3px; text-decoration: none; cursor: pointer; border: 0px #fff solid; box-shadow: 0px 0px 5px #B0B0B0; } .new-contentarea .upload-img:hover{ background-color: #d6796d; } .new-contentarea input[type=file]{ width: 188px; height: 60px; background: #333; margin: 0 auto; position: absolute; right: 50%; margin-right: -94px; top: 0; right/***/: 0px9; margin-right/***/: 0px9; width/***/: 10px9; opacity: 0; filter: alpha(opacity=0); z-index: 2; cursor: pointer; }
也可以查看这个 上传按钮美化的教程