目前项目需要一个多图上传的功能，使用LayUI并也是可以实现多图上传的，但是没有图片删除功能，参考了一下网上多图上传的插件，选择了WebUpload进行功能开发。
然而不幸的是，官方的插件并不带UI界面。
我觉得不行！
SO，那就COPY WebUpload官方DEMO的源码过来。
还是先将源码导入到项目中，webupload运行需要Jquery，不然报错！
jQuery(function () {
var $ = jQuery, // just in case. Make sure it's not an other libaray.
$wrap = $('#uploader'),
// 图片容器
$queue = $('')
.appendTo($wrap.find('.queueList')),
// 状态栏，包括进度和控制按钮
$statusBar = $wrap.find('.statusBar'),
// 文件总体选择信息。
$info = $statusBar.find('.info'),
// 上传按钮
$upload = $wrap.find('.uploadBtn'),
// 没选择文件之前的内容。
$placeHolder = $wrap.find('.placeholder'),
// 总体进度条
$progress = $statusBar.find('.progress').hide(),
// 添加的文件数量
fileCount = 0,
// 添加的文件总大小
fileSize = 0,
// 优化retina, 在retina下这个值是2
ratio = window.devicePixelRatio || 1,
// 缩略图大小
thumbnailWidth = 110 * ratio,
thumbnailHeight = 110 * ratio,
// 可能有pedding, ready, uploading, confirm, done.
state = 'pedding',
// 所有文件的进度信息，key为file id
percentages = {},
supportTransition = (function () {
var s = document.createElement('p').style,
r = 'transition' in s ||
'WebkitTransition' in s ||
'MozTransition' in s ||
'msTransition' in s ||
'OTransition' in s;
s = null;
return r;
})(),
// WebUploader实例
uploader;
if (!WebUploader.Uploader.support()) {
alert('Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
throw new Error('WebUploader does not support the browser you are using.');
}
// 实例化
uploader = WebUploader.create({
pick: {
id: '#uploadBtn',
label: '点击选择图片'
},
dnd: '#uploader .queueList',
paste: document.body,
accept: {
title: 'Images',
extensions: 'gif,jpg,jpeg,bmp,png',
mimeTypes: 'image/*'
},
// swf文件路径
swf: Feng.ctxPath + 'assets/common/webupload/js/Uploader.swf',
disableGlobalDnd: true,
chunked: true,
// server: 'http://webuploader.duapp.com/server/fileupload.php',
server: Feng.ctxPath + '/system/upload',
fileNumLimit: 300,
fileSizeLimit: 5 * 1024 * 1024, // 200 M
fileSingleSizeLimit: 1 * 1024 * 1024 // 50 M
});
// 添加"添加文件"的按钮，
uploader.addButton({
id: '#filePicker2',
label: '继续添加'
});
// 当有文件添加进来时执行，负责view的创建
function addFile(file) {
var $li = $('' +
'' + file.name + '' +
'' +
'' +
''),
$btns = $('' +
'删除' +
'向右旋转' +
'向左旋转').appendTo($li),
$prgress = $li.find('p.progress span'),
$wrap = $li.find('p.imgWrap'),
$info = $(''),
showError = function (code) {
switch (code) {
case 'exceed_size':
text = '文件大小超出';
break;
case 'interrupt':
text = '上传暂停';
break;
default:
text = '上传失败，请重试';
break;
}
$info.text(text).appendTo($li);
};
if (file.getStatus() === 'invalid') {
showError(file.statusText);
} else {
// @todo lazyload
$wrap.text('预览中');
uploader.makeThumb(file, function (error, src) {
if (error) {
$wrap.text('不能预览');
return;
}
var img = $('');
$wrap.empty().append(img);
}, thumbnailWidth, thumbnailHeight);
percentages[file.id] = [file.size, 0];
file.rotation = 0;
}
file.on('statuschange', function (cur, prev) {
if (prev === 'progress') {
$prgress.hide().width(0);
} else if (prev === 'queued') {
$li.off('mouseenter mouseleave');
$btns.remove();
}
// 成功
if (cur === 'error' || cur === 'invalid') {
console.log(file.statusText);
showError(file.statusText);
percentages[file.id][1] = 1;
} else if (cur === 'interrupt') {
showError('interrupt');
} else if (cur === 'queued') {
percentages[file.id][1] = 0;
} else if (cur === 'progress') {
$info.remove();
$prgress.css('display', 'block');
} else if (cur === 'complete') {
$li.append('');
}
$li.removeClass('state-' + prev).addClass('state-' + cur);
});
$li.on('mouseenter', function () {
$btns.stop().animate({height: 30});
});
$li.on('mouseleave', function () {
$btns.stop().animate({height: 0});
});
$btns.on('click', 'span', function () {
var index = $(this).index(),
deg;
switch (index) {
case 0:
uploader.removeFile(file);
return;
case 1:
file.rotation += 90;
break;
case 2:
file.rotation -= 90;
break;
}
if (supportTransition) {
deg = 'rotate(' + file.rotation + 'deg)';
$wrap.css({
'-webkit-transform': deg,
'-mos-transform': deg,
'-o-transform': deg,
'transform': deg
});
} else {
$wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
// use jquery animate to rotation
// $({
// rotation: rotation
// }).animate({
// rotation: file.rotation
// }, {
// easing: 'linear',
// step: function( now ) {
// now = now * Math.PI / 180;
// var cos = Math.cos( now ),
// sin = Math.sin( now );
// $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
// }
// });
}
});
$li.appendTo($queue);
}
// 负责view的销毁
function removeFile(file) {
var $li = $('#' + file.id);
delete percentages[file.id];
updateTotalProgress();
$li.off().find('.file-panel').off().end().remove();
}
function updateTotalProgress() {
var loaded = 0,
total = 0,
spans = $progress.children(),
percent;
$.each(percentages, function (k, v) {
total += v[0];
loaded += v[0] * v[1];
});
percent = total ? loaded / total : 0;
spans.eq(0).text(Math.round(percent * 100) + '%');
spans.eq(1).css('width', Math.round(percent * 100) + '%');
updateStatus();
}
function updateStatus() {
var text = '', stats;
if (state === 'ready') {
text = '选中' + fileCount + '张图片，共' +
WebUploader.formatSize(fileSize) + '。';
} else if (state === 'confirm') {
stats = uploader.getStats();
if (stats.uploadFailNum) {
text = '已成功上传' + stats.successNum + '张照片至XX相册，' +
stats.uploadFailNum + '张照片上传失败，重新上传失败图片或忽略'
}
} else {
stats = uploader.getStats();
text = '共' + fileCount + '张（' +
WebUploader.formatSize(fileSize) +
'），已上传' + stats.successNum + '张';
if (stats.uploadFailNum) {
text += '，失败' + stats.uploadFailNum + '张';
}
}
$info.html(text);
}
function setState(val) {
var file, stats;
if (val === state) {
return;
}
$upload.removeClass('state-' + state);
$upload.addClass('state-' + val);
state = val;
switch (state) {
case 'pedding':
$placeHolder.removeClass('element-invisible');
$queue.parent().removeClass('filled');
$queue.hide();
$statusBar.addClass('element-invisible');
uploader.refresh();
break;
case 'ready':
$placeHolder.addClass('element-invisible');
$('#filePicker2').removeClass('element-invisible');
$queue.parent().addClass('filled');
$queue.show();
$statusBar.removeClass('element-invisible');
uploader.refresh();
break;
case 'uploading':
$('#filePicker2').addClass('element-invisible');
$progress.show();
$upload.text('暂停上传');
break;
case 'paused':
$progress.show();
$upload.text('继续上传');
break;
case 'confirm':
$progress.hide();
$upload.text('开始上传').addClass('disabled');
stats = uploader.getStats();
if (stats.successNum && !stats.uploadFailNum) {
setState('finish');
return;
}
break;
case 'finish':
stats = uploader.getStats();
if (stats.successNum) {
alert('上传成功');
} else {
// 没有成功的图片，重设
state = 'done';
location.reload();
}
break;
}
updateStatus();
}
uploader.onUploadProgress = function (file, percentage) {
var $li = $('#' + file.id),
$percent = $li.find('.progress span');
$percent.css('width', percentage * 100 + '%');
percentages[file.id][1] = percentage;
updateTotalProgress();
};
uploader.onFileQueued = function (file) {
fileCount++;
fileSize += file.size;
if (fileCount === 1) {
$placeHolder.addClass('element-invisible');
$statusBar.show();
}
addFile(file);
setState('ready');
updateTotalProgress();
};
uploader.onFileDequeued = function (file) {
fileCount--;
fileSize -= file.size;
if (!fileCount) {
setState('pedding');
}
removeFile(file);
updateTotalProgress();
};
uploader.on('all', function (type) {
var stats;
switch (type) {
case 'uploadFinished':
setState('confirm');
break;
case 'startUpload':
setState('uploading');
break;
case 'stopUpload':
setState('paused');
break;
}
});
uploader.onError = function (code) {
alert('Eroor: ' + code);
};
$upload.on('click', function () {
if ($(this).hasClass('disabled')) {
return false;
}
if (state === 'ready') {
uploader.upload();
} else if (state === 'paused') {
uploader.upload();
} else if (state === 'uploading') {
uploader.stop();
}
});
$info.on('click', '.retry', function () {
uploader.retry();
});
$info.on('click', '.ignore', function () {
alert('todo');
});
$upload.addClass('state-' + state);
updateTotalProgress();
});
将以上代码复制到项目JS中，修改swf文件路径和上传图片路径。
HTML：
可以去GITHUB下载UI样式和图片:https://github.com/fex-team/webuploader/tree/master/examples
Original: https://www.cnblogs.com/yangchaojie/p/10486544.html
Author: 杨超杰
Title: webupload项目中使用
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