diff --git a/CTAssetsPickerController/CTAssetCollectionViewController.m b/CTAssetsPickerController/CTAssetCollectionViewController.m
index 9d34941a..0daf3c61 100644
--- a/CTAssetsPickerController/CTAssetCollectionViewController.m
+++ b/CTAssetsPickerController/CTAssetCollectionViewController.m
@@ -68,7 +68,6 @@ - (instancetype)init
     if (self = [super initWithStyle:UITableViewStylePlain])
     {
         _imageManager = [PHCachingImageManager new];
-      
         [self addNotificationObserver];
     }
     
diff --git a/CTAssetsPickerController/CTAssetItemViewController.m b/CTAssetsPickerController/CTAssetItemViewController.m
index 24dfe763..24000d66 100644
--- a/CTAssetsPickerController/CTAssetItemViewController.m
+++ b/CTAssetsPickerController/CTAssetItemViewController.m
@@ -24,6 +24,7 @@ of this software and associated documentation files (the "Software"), to deal
  
  */
 
+
 #import <PureLayout/PureLayout.h>
 #import "CTAssetsPickerController.h"
 #import "CTAssetItemViewController.h"
@@ -33,6 +34,8 @@ of this software and associated documentation files (the "Software"), to deal
 #import "PHImageManager+CTAssetsPickerController.h"
 
 
+
+
 @interface CTAssetItemViewController ()
 
 @property (nonatomic, weak) CTAssetsPickerController *picker;
@@ -50,6 +53,9 @@ @interface CTAssetItemViewController ()
 @end
 
 
+
+
+
 @implementation CTAssetItemViewController
 
 + (CTAssetItemViewController *)assetItemViewControllerForAsset:(PHAsset *)asset
@@ -136,7 +142,7 @@ - (void)setupViews
 {
     CTAssetScrollView *scrollView = [CTAssetScrollView newAutoLayoutView];
     scrollView.allowsSelection = self.allowsSelection;
-  
+    
     self.scrollView = scrollView;
     [self.view addSubview:self.scrollView];
     [self.view layoutIfNeeded];
@@ -202,7 +208,7 @@ - (void)requestAssetImage
 
                                   // this image is set for transition animation
                                   self.image = image;
-
+                                
                                   dispatch_async(dispatch_get_main_queue(), ^{
                                   
                                       NSError *error = info[PHImageErrorKey];
@@ -231,7 +237,7 @@ - (PHImageRequestOptions *)imageRequestOptions
             [self.scrollView setProgress:progress];
         });
     };
-
+    
     return options;
 }
 
diff --git a/CTAssetsPickerController/CTAssetScrollView.m b/CTAssetsPickerController/CTAssetScrollView.m
index 0e1fb54c..5ad9b9a1 100644
--- a/CTAssetsPickerController/CTAssetScrollView.m
+++ b/CTAssetsPickerController/CTAssetScrollView.m
@@ -24,7 +24,6 @@ of this software and associated documentation files (the "Software"), to deal
  
  */
 
-
 #import <PureLayout/PureLayout.h>
 #import "CTAssetScrollView.h"
 #import "CTAssetPlayButton.h"
@@ -33,6 +32,8 @@ of this software and associated documentation files (the "Software"), to deal
 #import "UIImage+CTAssetsPickerController.h"
 
 
+
+
 NSString * const CTAssetScrollViewDidTapNotification = @"CTAssetScrollViewDidTapNotification";
 NSString * const CTAssetScrollViewPlayerWillPlayNotification = @"CTAssetScrollViewPlayerWillPlayNotification";
 NSString * const CTAssetScrollViewPlayerWillPauseNotification = @"CTAssetScrollViewPlayerWillPauseNotification";
@@ -289,7 +290,7 @@ - (void)bind:(PHAsset *)asset image:(UIImage *)image requestInfo:(NSDictionary *
     self.playButton.hidden = [asset ctassetsPickerIsPhoto];
     
     BOOL isDegraded = [info[PHImageResultIsDegradedKey] boolValue];
-
+    
     if (self.image == nil || !isDegraded)
     {
         BOOL zoom = (!self.image);
@@ -347,6 +348,7 @@ - (void)unbindPlayerItem
 }
 
 
+
 #pragma mark - Upate zoom scales
 
 - (void)updateZoomScalesAndZoom:(BOOL)zoom
diff --git a/CTAssetsPickerController/CTAssetsGridViewController.h b/CTAssetsPickerController/CTAssetsGridViewController.h
index a2cf7842..34d68fec 100644
--- a/CTAssetsPickerController/CTAssetsGridViewController.h
+++ b/CTAssetsPickerController/CTAssetsGridViewController.h
@@ -45,7 +45,6 @@
 @property (nonatomic, weak) id<CTAssetsGridViewControllerDelegate> delegate;
 @property (nonatomic, strong, nonnull) PHAssetCollection *assetCollection;
 
-
 @end
 
 
diff --git a/CTAssetsPickerController/CTAssetsPageViewController.m b/CTAssetsPickerController/CTAssetsPageViewController.m
index 67044dcd..68382706 100644
--- a/CTAssetsPickerController/CTAssetsPageViewController.m
+++ b/CTAssetsPickerController/CTAssetsPageViewController.m
@@ -205,7 +205,7 @@ - (void)setPageIndex:(NSInteger)pageIndex
         
         CTAssetItemViewController *page = [CTAssetItemViewController assetItemViewControllerForAsset:asset];
         page.allowsSelection = self.allowsSelection;
-      
+        
         [self setViewControllers:@[page]
                        direction:UIPageViewControllerNavigationDirectionForward
                         animated:NO
@@ -234,7 +234,7 @@ - (UIViewController *)pageViewController:(UIPageViewController *)pageViewControl
         PHAsset *beforeAsset = self.assets[(index - 1)];
         CTAssetItemViewController *page = [CTAssetItemViewController assetItemViewControllerForAsset:beforeAsset];
         page.allowsSelection = self.allowsSelection;
-      
+        
         return page;
     }
 
diff --git a/CTAssetsPickerController/CTAssetsPickerController.m b/CTAssetsPickerController/CTAssetsPickerController.m
index 0f514595..7e055593 100644
--- a/CTAssetsPickerController/CTAssetsPickerController.m
+++ b/CTAssetsPickerController/CTAssetsPickerController.m
@@ -249,7 +249,6 @@ - (void)setupEmptyViewController
 - (void)setupSplitViewController
 {
     CTAssetCollectionViewController *vc = [CTAssetCollectionViewController new];
-
     CTAssetsNavigationController *master = [[CTAssetsNavigationController alloc] initWithRootViewController:vc];
     UINavigationController *detail = [self emptyNavigationController];
     UISplitViewController *svc  = [UISplitViewController new];
diff --git a/CTAssetsPickerDemo/CTMasterViewController.m b/CTAssetsPickerDemo/CTMasterViewController.m
index 3fb1b4a9..b09c11eb 100644
--- a/CTAssetsPickerDemo/CTMasterViewController.m
+++ b/CTAssetsPickerDemo/CTMasterViewController.m
@@ -166,7 +166,6 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         
         if (row == 5)
             title = @"UI tweaks";
-      
     }
     
     if (section == 1)
@@ -242,7 +241,6 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
         
         if (row == 5)
             vc = (UIViewController *)[CTUITweaksViewController new];
-        
     }
     
     if (section == 1)