WEUI原生以及使用webuploader插件上传方法

weui1.0.0

webuploder-0.1.5

不多说，直接看代码

		$(function() {
			// 允许上传的图片类型
			var allowTypes = [ 'image/jpg', 'image/jpeg', 'image/png', 'image/gif' ];
			// 1024KB，也就是 1MB
			var maxSize = 1024 * 1024;
			// 图片最大宽度
			var maxWidth = 300;
			// 最大上传图片数量
			var maxCount = 6;
			$('.js_file').on('change', function(event) {
				var files = event.target.files;
				// 如果没有选中文件，直接返回
				if (files.length === 0) {
					return;
				}
				for (var i = 0, len = files.length; i < len; i++) {
					var file = files[i];
					var reader = new FileReader();
					// 如果类型不在允许的类型范围内
					if (allowTypes.indexOf(file.type) === -1) {
						$.weui.alert({
							text : '该类型不允许上传'
						});
						continue;
					}
 					if (file.size > maxSize) {
 						$.weui.alert({
 							text : '图片太大，不允许上传'
 						});
 						continue;
 					}
 					if ($('.weui_uploader_file').length >= maxCount) {
 						$.weui.alert({
 							text : '最多只能上传' + maxCount + '张图片'
 						});
 						return;
 					}
					reader.onload = function(e) {
						var img = new Image();
						img.onload = function() {
							// 不要超出最大宽度
							var w = Math.min(maxWidth, img.width);
							// 高度按比例计算
							var h = img.height * (w / img.width);
							var canvas = document.createElement('canvas');
							var ctx = canvas.getContext('2d');
							// 设置 canvas 的宽度和高度
							canvas.width = w;
							canvas.height = h;
							ctx.drawImage(img, 0, 0, w, h);
							var base64 = canvas.toDataURL('image/png');

							// 插入到预览区
							var $preview = $('<li class="weui-uploader__file weui-uploader__file_status" style="background-image:url('
									+ base64 + ')"><div class="weui-uploader__file-content">0%</div></li>');

							$('.weui-uploader__files').append($preview);

							// 然后假装在上传，可以post base64格式，也可以构造blob对象上传，也可以用微信JSSDK上传
							var progress = 0;
							function uploading() {
								$preview.find('.weui-uploader__file-content').text(++progress + '%');
								if (progress < 100) {
									setTimeout(uploading, 30);
								} else {
									// 如果是失败，塞一个失败图标
									//$preview.find('.weui-uploader__file-content').html('<i class="weui_icon_warn"></i>');
									$preview.removeClass('weui-uploader__file_status')
											.find('.weui-uploader__file-content')
											.remove();
								}
							}
							setTimeout(uploading, 30);
						};
						img.src = e.target.result;
					};
					reader.readAsDataURL(file);
				}
			});
		});

html

<div class="weui-cells weui-cells_form">
	<form method="post">
		<div class="weui-cells__title">照片</div>
		<div class="weui-cell">
			<div class="weui-cell__bd">
				<div class="weui-uploader__bd">
					<ul class="weui-uploader__files">
						<li class="weui-uploader__file" style="background-image:url(http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/ba2d23de68ad4dcc8ed67622f911f14c20170113154227.png_140x88x1x85.jpg)">
						</li>
					</ul>
					<div class="weui-uploader__input-box">
						<input id="uploaderInput" class="weui-uploader__input js_file" type="file" accept="image/*" multiple>
					</div>
				</div>
			</div>
		</div>
		<div class="weui-btn-area"><a href="javascript:;" class="weui-btn weui-btn_primary">保存</a></div>
	</form>
</div>

上面是搜到的原生解决办法，这个基础上可以将base64上传到七牛，详见：

https://support.qiniu.com/question/69078

下面是webuploader插件上传代码，本例上传七牛

var uploader = WebUploader.create({
	auto: true,
	swf: '/statics/webuploader-0.1.5/Uploader.swf',
	server: 'http://upload.qiniu.com/',
	pick: '#imgInput',
	accept: {
		title: 'Images',
		extensions: 'gif,jpg,jpeg,bmp,png',
		mimeTypes: 'image/*'
	},
	method: 'POST',
	formData: {'token':'%token%'}
});
uploader.on('uploadStart',function(file) {
	this.options.formData.key='image/'+new Date().getTime()+'/'+file.name.replace(/,/g, '');
});
uploader.on('fileQueued', function(file) {
	var $preview = $('<li id="'+file.id+'" class="weui-uploader__file weui-uploader__file_status"><div class="weui-uploader__file-content">0%</div></li>');
	$('#imgList').append($preview);
	uploader.makeThumb(file, function( error, src) {
	$('#'+file.id).css('background-image','url('+src+')');
    }, 79, 79 );
});
uploader.on('uploadProgress', function(file, percentage ) {
	$('#'+file.id).find('.weui-uploader__file-content').html(percentage+'%');
});
uploader.on('uploadSuccess', function(file, response) {
	$('#'+file.id).removeClass('weui-uploader__file_status')
	.find('.weui-uploader__file-content')
	.remove();
// 上传成功，想干点什么就在这里干吧
});

html

<div class="weui-cell">
	<div class="weui-cell__bd">
		<div class="weui-uploader__bd">
			<ul class="weui-uploader__files" id="imgList">
				<li id="" class="weui-uploader__file" style="background-image:url()"></li>
			</ul>
			<div class="weui-uploader__input-box">
				<div id="imgInput" class="weui-uploader__input">选择图片</div>
			</div>
		</div>
	</div>
</div>

 

转载于:https://my.oschina.net/illone/blog/826574