需求：实现一个图片上传并显示缩略图的功能，如下图所示：
限制：一次只能上传一个图片，每上传一个显示一个。
HTML
<div class="form-group"><label for="test" class="col-xs-3 control-label required-field">Please select file: </label> <div class="col-xs-9"><input type="file" id="input" accept="image/*" file-model="images" οnchange="angular.element(this).scope().upload(this.files)"/></div><label class="col-xs-3" >Selected files:</label> <div class="col-xs-9"> <span ng-repeat="item in pictures" ><img ng-src="{{item.imgSrc}}" style="max-width:100px;max-height:100px;margin:0 auto;display:inline-block;" /></span></div> </div>
JS
$scope.reader = new FileReader();$scope.pictures = {};var data = new FormData();//used for saving picture information$scope.upload = function(files) { $scope.id = (new Date()).valueOf();$scope.reader.readAsDataURL(files[0]);$scope.reader.onload = function(ev) {$scope.$apply(function(){$scope.thumb[$scope.id] = {imgSrc : ev.target.result,}});};data.append('image', files[0]);data.append('id',$scope.id);};
望多指教，谢谢：）
