From 8e6c1e0d45a0e65cec261505d964b09a3b32c7b3 Mon Sep 17 00:00:00 2001
From: Amit Jain <gravicle@gmail.com>
Date: Fri, 25 Mar 2016 14:44:21 -0500
Subject: [PATCH] Add support for invalidity

---
 .../JVFloatLabeledTextField.h                        | 11 +++++++++++
 .../JVFloatLabeledTextField.m                        | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.h b/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.h
index 00be5ec..afd73ad 100644
--- a/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.h
+++ b/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.h
@@ -48,6 +48,11 @@ IB_DESIGNABLE
  */
 @property (nonatomic, strong, readonly) UILabel * floatingLabel;
 
+/**
+ * Applied `floatingLabelInvalidTextColor` when true and the field is not a first responder
+ */
+@property (nonatomic) BOOL hasInvalidInput;
+
 /**
  * Padding to be applied to the y coordinate of the floating label upon presentation.
  * Defaults to zero.
@@ -86,6 +91,12 @@ IB_DESIGNABLE
  */
 @property (nonatomic, strong) IBInspectable UIColor * floatingLabelActiveTextColor;
 
+/**
+ * Text color to be applied to the floating label while the field has `invalidInput`.
+ * The effect is disabled if an `floatingLabelInvalidTextColor` is not provided.
+ */
+@property (nonatomic, strong) IBInspectable UIColor * floatingLabelInvalidTextColor;
+
 /**
  * Indicates whether the floating label's appearance should be animated regardless of first responder status.
  * By default, animation only occurs if the text field is a first responder.
diff --git a/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.m b/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.m
index 1f0f9a6..cd4ce2f 100644
--- a/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.m
+++ b/JVFloatLabeledTextField/JVFloatLabeledTextField/JVFloatLabeledTextField.m
@@ -117,6 +117,16 @@ - (UIColor *)labelActiveColor
     return [UIColor blueColor];
 }
 
+- (UIColor *)labelInvalidColor
+{
+    if (_floatingLabelInvalidTextColor) {
+        return  _floatingLabelInvalidTextColor;
+    }
+    else {
+        return [self labelActiveColor];
+    }
+}
+
 - (void)setFloatingLabelFont:(UIFont *)floatingLabelFont
 {
     if (floatingLabelFont != nil) {
@@ -337,8 +347,10 @@ - (void)layoutSubviews
                                       floatingLabelSize.height);
     
     BOOL firstResponder = self.isFirstResponder;
+    BOOL hasInvalidInput = self.hasInvalidInput;
     _floatingLabel.textColor = (firstResponder && self.text && self.text.length > 0 ?
                                 self.labelActiveColor : self.floatingLabelTextColor);
+    if ((!firstResponder && hasInvalidInput)) { _floatingLabel.textColor = self.labelInvalidColor; }
     if ((!self.text || 0 == [self.text length]) && !self.alwaysShowFloatingLabel) {
         [self hideFloatingLabel:firstResponder];
     }