angularjs上傳多張圖檔并預覽

directive.js

/*
 * 多圖檔上傳及預覽指令(需指定圖檔類名)
 * 
 */

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]);
                });
                //附件預覽
                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關鍵代碼

<section class="infogroup">
    <h4>法人證件</h4>
    <div class="row relatedCard">
        <div class="col-md-4 txtcenter">
            <p>身份證正面</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> 點選編輯
                 <input type="file" file-model="idCardFace" img-view-id="idCardFace" />
            </span> 
        </div>
        <div class="col-md-4 txtcenter">
            <p>身份證反面</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> 點選編輯
                 <input type="file" file-model="idCardBack" img-view-id="idCardBack" />
            </span> 
        </div>                                      
    </div>
</section>
           

controller.js中發送到背景的資料

$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){
<!-- 成功執行代碼 -->
});
           

預覽如下：