Add support for NSAttributedString placeholder

class/HPGrowingTextView.h

@@ -89,6 +89,7 @@
 @property NSTimeInterval animationDuration;
 @property (nonatomic, strong) NSString *placeholder;
 @property (nonatomic, strong) UIColor *placeholderColor;
+@property (nonatomic, strong) NSAttributedString *attributedPlaceholder;
 @property (nonatomic, strong) UITextView *internalTextView;	
 
 

class/HPGrowingTextView.m

@@ -238,6 +238,7 @@ - (NSString *)placeholder
 - (void)setPlaceholder:(NSString *)placeholder
 {
     [internalTextView setPlaceholder:placeholder];
+	  [internalTextView setAttributedPlaceholder:nil];
     [internalTextView setNeedsDisplay];
 }
 
@@ -251,6 +252,16 @@ - (void)setPlaceholderColor:(UIColor *)placeholderColor
     [internalTextView setPlaceholderColor:placeholderColor];
 }
 
+- (NSAttributedString *)attributedPlaceholder {
+	  return [internalTextView attributedPlaceholder];
+}
+
+- (void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder {
+    [internalTextView setAttributedPlaceholder:attributedPlaceholder];
+    [internalTextView setPlaceholder:nil];
+    [internalTextView setNeedsDisplay];
+}
+
 - (void)textViewDidChange:(UITextView *)textView
 {
     [self refreshHeight];

class/HPTextViewInternal.h

@@ -32,6 +32,7 @@
 
 @property (nonatomic, strong) NSString *placeholder;
 @property (nonatomic, strong) UIColor *placeholderColor;
+@property (nonatomic, strong) NSAttributedString *attributedPlaceholder;
 @property (nonatomic) BOOL displayPlaceHolder;
 
 @end

class/HPTextViewInternal.m

@@ -101,17 +101,27 @@ -(void)setContentSize:(CGSize)contentSize
 - (void)drawRect:(CGRect)rect
 {
     [super drawRect:rect];
-    if (self.displayPlaceHolder && self.placeholder && self.placeholderColor)
+    if (self.displayPlaceHolder && (self.attributedPlaceholder || (self.placeholder && self.placeholderColor)))
     {
         if ([self respondsToSelector:@selector(snapshotViewAfterScreenUpdates:)])
         {
-            NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
-            paragraphStyle.alignment = self.textAlignment;
-            [self.placeholder drawInRect:CGRectMake(5, 8 + self.contentInset.top, self.frame.size.width-self.contentInset.left, self.frame.size.height- self.contentInset.top) withAttributes:@{NSFontAttributeName:self.font, NSForegroundColorAttributeName:self.placeholderColor, NSParagraphStyleAttributeName:paragraphStyle}];
+	          CGRect placeholderRect = CGRectMake(5, 8 + self.contentInset.top, self.frame.size.width-self.contentInset.left, self.frame.size.height- self.contentInset.top);
+            if (self.attributedPlaceholder) {
+              [self.attributedPlaceholder drawInRect:placeholderRect];
+            } else {
+              NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
+              paragraphStyle.alignment = self.textAlignment;
+              [self.placeholder drawInRect:placeholderRect withAttributes:@{NSFontAttributeName:self.font, NSForegroundColorAttributeName:self.placeholderColor, NSParagraphStyleAttributeName:paragraphStyle}];
+            }
         }
         else {
-            [self.placeholderColor set];
-            [self.placeholder drawInRect:CGRectMake(8.0f, 8.0f, self.frame.size.width - 16.0f, self.frame.size.height - 16.0f) withFont:self.font];
+	          CGRect placeholderRect = CGRectMake(8.0f, 8.0f, self.frame.size.width - 16.0f, self.frame.size.height - 16.0f);
+            if (self.attributedPlaceholder) {
+              [self.attributedPlaceholder drawInRect:placeholderRect];
+            } else {
+              [self.placeholderColor set];
+              [self.placeholder drawInRect:placeholderRect withFont:self.font];
+            }
         }
     }
 }