angularjs实现多张图片上传并预览功能

本文实例为大家分享了angularjs上传多张图片并预览的具体代码，供大家参考，具体内容如下

directive.js

/*
 * 多图片上传及预览指令(需指定图片类名)
 *
 */ 

angular.module('routerModule').directive('fileModel', ['$parse', 'fileReader', function($parse, fileReader) {
 return {
 restrict:'A',
  link:function(scope, element, attrs, ngModel) {
  var model = $parse(attrs.fileModel);
  var modelSetter = model.assign;
  var imgviewID = attrs["imgViewId"];
  var imgView = angular.element(document.querySelector("."+imgviewID));
  element.bind('change', function(event) {
  scope.$apply(function() {
   modelSetter(scope, element[0].files[0]);
  });
  //附件预览
  scope.file = (event.srcElement || event.target).files[0];
  fileReader.readAsDataUrl(scope.file, scope).then(function(result) {
   imgView.attr("src",result);
  });
  });
 }
 }
}]); 

angular.module('routerModule').factory('fileReader', ["$q", "$log", function($q, $log) {
 var onLoad = function(reader, deferred, scope) {
 return function() {
  scope.$apply(function() {
  deferred.resolve(reader.result);
  });
 }
 } 

 var onError = function(reader, deferred, scope) {
 return function() {
  scope.$apply(function() {
  deferred.reject(reader.result);
  });
 };
 }; 

 var getReader = function(deferred, scope) {
 var reader = new FileReader();
 reader.onload = onLoad(reader, deferred, scope);
 reader.onerror = onError(reader, deferred, scope);
 return reader;
 }; 

 var readAsDataURL = function(file, scope) {
 var deferred = $q.defer();
 var reader = getReader(deferred, scope);
 reader.readAsDataURL(file);
 return deferred.promise;
 }
 return {
 readAsDataUrl: readAsDataURL
 };
 }
]);

html关键代码

<section class="infogroup">
 <h4>法人证件</h4>
 <div class="row relatedCard">
 <div class="col-md-4 txtcenter">
  <p>身份证正面</p>
  <div><img ng-src="showImg/{{dealer.idCardFace}}" class="idCardFace" enlarge-pic/></div>
  <span class="btn btn-file btn btn-xs btn-primary btn-editable picEdit"><i class="fa fa-edit"></i> 点击编辑
   <input type="file" file-model="idCardFace" img-view-id="idCardFace" />
  </span>
 </div>
 <div class="col-md-4 txtcenter">
  <p>身份证反面</p>
  <div><img ng-src="showImg/{{dealer.idCardBack}}" class="idCardBack" enlarge-pic/></div>
  <span class="btn btn-file btn btn-xs btn-primary btn-editable picEdit"><i class="fa fa-edit"></i> 点击编辑
   <input type="file" file-model="idCardBack" img-view-id="idCardBack" />
  </span>
 </div>
 </div>
</section>

controller.js中发送到后台的数据

$scope.postData = {
 dealerId: $scope.dealer.dealerId,
 companyName: $scope.dealer.companyName,
 companySize: $scope.dealer.companySize,
 idCardFace: angular.element(document.querySelector(".idCardFace"))[0].src,
 idCardBack: angular.element(document.querySelector(".idCardBack"))[0].src
};
$http.post('updateDealerCertificate',$scope.postData).success(function(data){
<!-- 成功执行代码 -->
});

预览如下：

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