exposing the focused placeholder color

Author: louoso

MaterialTextField/MFTextField.h

@@ -38,6 +38,11 @@ IB_DESIGNABLE
  */
 @property (nonatomic) IBInspectable UIColor *placeholderColor;
 
+/**
+ * The color of the placeholder label when the text field is in focus.
+ */
+@property (nonatomic) IBInspectable UIColor *focusedPlaceholderColor;
+
 /**
  * Defaults to the first applicable font:
  * - the attributed placeholder font at the default placeholder size

MaterialTextField/MFTextField.m

@@ -488,7 +488,8 @@ - (void)updatePlaceholderColor
     UIColor *color;
 
     if (self.isFirstResponder) {
-        color = (self.hasError) ? self.errorColor : self.tintColor;
+        UIColor * focusedPlaceHolderColor = self.focusedPlaceholderColor ?: self.tintColor;
+        color = (self.hasError) ? self.errorColor : focusedPlaceHolderColor;
     }
     else {
         color = self.placeholderColor;