Added sorting by creationDate asc and desc

QBImagePicker/QBAlbumsViewController.m

@@ -295,6 +295,8 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         default:
             break;
     }
+
+	options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending: self.imagePickerController.sortMediaByCreationDateAscending]];
 
     PHFetchResult *fetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:options];
     PHImageManager *imageManager = [PHImageManager defaultManager];

QBImagePicker/QBAssetsViewController.m

@@ -246,6 +246,8 @@ - (void)updateFetchRequest
             default:
                 break;
         }
+
+		options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending: self.imagePickerController.sortMediaByCreationDateAscending]];
 
         self.fetchResult = [PHAsset fetchAssetsInAssetCollection:self.assetCollection options:options];
 

QBImagePicker/QBImagePickerController.h

@@ -37,6 +37,7 @@ typedef NS_ENUM(NSUInteger, QBImagePickerMediaType) {
 
 @property (nonatomic, copy) NSArray *assetCollectionSubtypes;
 @property (nonatomic, assign) QBImagePickerMediaType mediaType;
+@property (nonatomic, assign) BOOL sortMediaByCreationDateAscending;
 
 @property (nonatomic, assign) BOOL allowsMultipleSelection;
 @property (nonatomic, assign) NSUInteger minimumNumberOfSelection;