jquery实现图片上传

<style>
	.imageDiv {
		display:inline-block;
		width:100px;
		height:100px;
		-webkit-box-sizing:border-box;
		-moz-box-sizing:border-box;
		box-sizing:border-box;
		border:1px dashed darkgray;
		background:#f8f8f8;
		position:relative;
		overflow:hidden;
		margin:10px
	}
	.cover {
		position:absolute;
		z-index:1;
		top:0;
		left:0;
		width:100px;
		height:100px;
		background-color:rgba(0,0,0,.3);
		display:none;
		line-height:125px;
		text-align:center;
		cursor:pointer;
	}
	.cover .delbtn {
		color:red;
		font-size:10px;
	}
	.imageDiv:hover .cover {
		display:block;
	}
	.addImages {
		display:inline-block;
		width:100px;
		height:100px;
		-webkit-box-sizing:border-box;
		-moz-box-sizing:border-box;
		box-sizing:border-box;
		border:1px dashed darkgray;
		background:#f8f8f8;
		position:relative;
		overflow:hidden;
		margin:10px;
	}
	.text-detail {
		margin-top:10px;
		text-align:center;
	}
	.text-detail span {
		font-size:40px;
	}
	.file {
		position:absolute;
		top:0;
		left:0;
		width:100px;
		height:100px;
		opacity:0;
	}
</style>

<div style="width: 70%;margin: 0 auto">
	<div id="Pic_pass">
		<p style="font-weight: bold;">请上传图片</p>
		<p><span style="color: red">注：每张图片大小不可超过4M，一次最多可以上传4张,多张上传时必须按住ctrl选中</span></p>
		<div class="picDiv">
			<div class="addImages">

				<input type="file" class="file" name="file[]" id="fileInput" multiple="multiple" accept="image/png, image/jpeg, image/gif, image/jpg">
				<div class="text-detail">
					<span>+</span>
					<p>点击上传</p>
				</div>
			</div>
		</div>
	</div>
	<div class="msg" style="display: none;"></div>
</div>




<script>
	//图片上传预览功能
	var userAgent = navigator.userAgent; //用于判断浏览器类型

	$(".file").change(function() {
		//获取选择图片的对象
		var docObj = $(this)[0];
		var picDiv = $(this).parents(".picDiv");
		//得到所有的图片文件
		var fileList = docObj.files;
		//循环遍历
		for (var i = 0; i < fileList.length; i++) {
			//动态添加html元素
			var picHtml = "<div class='imageDiv' > <img id='img" + fileList[i].name + "' /> <div class='cover'><i class='delbtn'>删除</i></div></div>";
			// console.log(picHtml);
			picDiv.prepend(picHtml);
			//获取图片imgi的对象
			var imgObjPreview = document.getElementById("img" + fileList[i].name);
			if (fileList && fileList[i]) {
				//图片属性
				imgObjPreview.style.display = 'block';
				imgObjPreview.style.width = '100px';
				imgObjPreview.style.height = '100px';
				//imgObjPreview.src = docObj.files[0].getAsDataURL();
				//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要以下方式
				if (userAgent.indexOf('MSIE') == -1) {
					//IE以外浏览器
					imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]); //获取上传图片文件的物理路径;
					// console.log(imgObjPreview.src);
					// var msgHtml = '<input type="file" id="fileInput" multiple/>';
				} else {
					//IE浏览器
					if (docObj.value.indexOf(",") != -1) {
						var srcArr = docObj.value.split(",");
						imgObjPreview.src = srcArr[i];
					} else {
						imgObjPreview.src = docObj.value;
					}
				}
			}
		}

		/*删除功能*/
		$(".delbtn").click(function() {
			var _this = $(this);
			_this.parents(".imageDiv").remove();
		});
	});
</script>
    

删除图片：