diff --git a/DoImagePicker.podspec b/DoImagePicker.podspec
new file mode 100644
index 0000000..64af4a7
--- /dev/null
+++ b/DoImagePicker.podspec
@@ -0,0 +1,7 @@
+Pod::Spec.new do |s|
+    s.name = 'DoImagePicker'
+    s.version = '0.0.1'
+    s.source_files = 'ImagePicker/DoImagePicker/*.{h,m}'
+    s.resources = 'ImagePicker/DoImagePicker/*.xib'
+    s.requires_arc = true
+end
diff --git a/ImagePicker/DoImagePicker/DoImagePickerController.h b/ImagePicker/DoImagePicker/DoImagePickerController.h
index ded8a56..9978b8a 100644
--- a/ImagePicker/DoImagePicker/DoImagePickerController.h
+++ b/ImagePicker/DoImagePicker/DoImagePickerController.h
@@ -10,10 +10,10 @@
 #define DO_RGB(r, g, b)     [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1]
 #define DO_RGBA(r, g, b, a) [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a]
 
-#define DO_MENU_BACK_COLOR          DO_RGBA(57, 185, 238, 0.98)
-#define DO_SIDE_BUTTON_COLOR        DO_RGBA(57, 185, 238, 0.9)
+#define DO_MENU_BACK_COLOR          ([UINavigationBar appearance].barTintColor)//DO_RGBA(254, 64, 128, 0.88)
+#define DO_SIDE_BUTTON_COLOR        ([UINavigationBar appearance].barTintColor)//DO_RGBA(254, 64, 128, 0.8)
 
-#define DO_ALBUM_NAME_TEXT_COLOR    DO_RGB(57, 185, 238)
+#define DO_ALBUM_NAME_TEXT_COLOR    ([UINavigationBar appearance].barTintColor) //DO_RGB(254, 64, 128)
 #define DO_ALBUM_COUNT_TEXT_COLOR   DO_RGB(247, 200, 142)
 #define DO_BOTTOM_TEXT_COLOR        DO_RGB(255, 255, 255)
 
diff --git a/ImagePicker/DoImagePicker/DoImagePickerController.m b/ImagePicker/DoImagePicker/DoImagePickerController.m
index 3b7bcde..2291f2a 100644
--- a/ImagePicker/DoImagePicker/DoImagePickerController.m
+++ b/ImagePicker/DoImagePicker/DoImagePickerController.m
@@ -339,14 +339,8 @@ - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPa
 
 - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
 {
-    if (_nColumnCount == 2)
-        return CGSizeMake(158, 158);
-    else if (_nColumnCount == 3)
-        return CGSizeMake(104, 104);
-    else if (_nColumnCount == 4)
-        return CGSizeMake(77, 77);
-
-    return CGSizeZero;
+    CGFloat width = ([UIScreen mainScreen].bounds.size.width-3*_nColumnCount)/_nColumnCount;
+    return CGSizeMake(width, width);
 }
 
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView