Improved attributedPlaceholderString appearance on floating label

Author: matkuznik

Example/SMFloatingLabelTextField/SMViewController.m

@@ -20,7 +20,8 @@ - (void)viewDidLoad {
     [super viewDidLoad];
 
     NSDictionary *lastNamePlaceholderAttributes = @{NSForegroundColorAttributeName: [UIColor magentaColor],
-                                                    NSFontAttributeName: [UIFont systemFontOfSize:14.0f weight:UIFontWeightBold]
+                                                    NSFontAttributeName: [UIFont systemFontOfSize:14.0f weight:UIFontWeightBold],
+                                                    NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
                                                     };
     NSAttributedString *lastNamePlaceholder = [[NSAttributedString alloc] initWithString:@"Last name" attributes:lastNamePlaceholderAttributes];
 

SMFloatingLabelTextField.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'SMFloatingLabelTextField'
-  s.version          = '0.3.0'
+  s.version          = '0.3.1'
   s.summary          = 'A subclass of UITextField that displays floating placeholder'
 
 # This description is used to generate tags and improve search results.

SMFloatingLabelTextField/Classes/SMFloatingLabelTextField.m

@@ -174,7 +174,23 @@ - (void)setPlaceholder:(NSString *)placeholder {
 
 - (void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder {
     [super setAttributedPlaceholder:attributedPlaceholder];
-    self.floatingLabel.attributedText = attributedPlaceholder;
+    self.floatingLabel.attributedText = [self floatingLabelAttributedPlacecholderStringFrom:attributedPlaceholder];
+}
+
+- (NSAttributedString *)floatingLabelAttributedPlacecholderStringFrom:(NSAttributedString *)attributedString {
+    NSMutableAttributedString *mutableAttributedString = [attributedString mutableCopy];
+    NSRange wholeStringRange = NSMakeRange(0, mutableAttributedString.length);
+    [mutableAttributedString removeAttribute:NSFontAttributeName range:wholeStringRange];
+    [mutableAttributedString removeAttribute:NSForegroundColorAttributeName range:wholeStringRange];
+    
+    [mutableAttributedString addAttribute:NSFontAttributeName value:self.floatingLabelFont range:wholeStringRange];
+    if (self.displayFloatingPlaceholder) {
+        [mutableAttributedString addAttribute:NSForegroundColorAttributeName value:self.floatingLabelActiveColor range:wholeStringRange];
+    } else {
+        [mutableAttributedString addAttribute:NSForegroundColorAttributeName value:self.floatingLabelPassiveColor range:wholeStringRange];
+    }
+    
+    return [mutableAttributedString copy];
 }
 
 #pragma mark - dealloc