Add line spacing to text of internalTextView

class/HPGrowingTextView.h

@@ -55,7 +55,7 @@
 - (BOOL)growingTextViewShouldReturn:(HPGrowingTextView *)growingTextView;
 @end
 
-@interface HPGrowingTextView : UIView <UITextViewDelegate> {
+@interface HPGrowingTextView : UIView <UITextViewDelegate, NSLayoutManagerDelegate> {
 	HPTextViewInternal *internalTextView;	
 
 	int minHeight;
@@ -90,6 +90,7 @@
 @property (nonatomic, strong) NSString *placeholder;
 @property (nonatomic, strong) UIColor *placeholderColor;
 @property (nonatomic, strong) UITextView *internalTextView;	
+@property (nonatomic) CGFloat textLineSpacing;
 
 
 //uitextview properties

class/HPGrowingTextView.m

@@ -35,6 +35,7 @@ -(void)growDidStop;
 @end
 
 @implementation HPGrowingTextView
+@synthesize textLineSpacing;
 @synthesize internalTextView;
 @synthesize delegate;
 @synthesize maxHeight;
@@ -114,6 +115,8 @@ -(void)commonInitialiser
 
     [self setPlaceholderColor:[UIColor lightGrayColor]];
     internalTextView.displayPlaceHolder = YES;
+    internalTextView.layoutManager.delegate = self;
+    textLineSpacing = 0.0f;
 }
 
 -(CGSize)sizeThatFits:(CGSize)size
@@ -241,6 +244,17 @@ - (void)setPlaceholder:(NSString *)placeholder
     [internalTextView setNeedsDisplay];
 }
 
+- (CGFloat)textLineSpacing
+{
+    return self.textLineSpacing;
+}
+
+- (void)setTextLineSpacing:(CGFloat)lineSpacing
+{
+    textLineSpacing = lineSpacing;
+    [internalTextView setNeedsDisplay];
+}
+
 - (UIColor *)placeholderColor
 {
     return internalTextView.placeholderColor;
@@ -691,6 +705,12 @@ - (void)textViewDidChangeSelection:(UITextView *)textView {
 	}
 }
 
+///////////////////////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////////////////
+#pragma mark - NSLayoutManagerDelegate
 
+- (CGFloat)layoutManager:(NSLayoutManager *)layoutManager lineSpacingAfterGlyphAtIndex:(NSUInteger)glyphIndex withProposedLineFragmentRect:(CGRect)rect {
+  return self.textLineSpacing;
+}
 
 @end