[Issue TTTAttributedLabel#303] Implementing tintColorDidChange by add…

…ing inactiveLinkAttributes @Property Signed-off-by: Mattt Thompson <[email protected]>
Golface · Jan 10, 2014 · be4bdb6 · be4bdb6
1 parent cb60511
commit be4bdb6
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Showing 2 changed files with 41 additions and 1 deletion.
diff --git a/TTTAttributedLabel/TTTAttributedLabel.h b/TTTAttributedLabel/TTTAttributedLabel.h
@@ -134,6 +134,11 @@ extern NSString * const kTTTBackgroundCornerRadiusAttributeName;
  */
 @property (nonatomic, strong) NSDictionary *activeLinkAttributes;
 
+/**
+ A dictionary containing the `NSAttributedString` attributes to be applied to links when they are in the inactive state, which is triggered a change in `tintColor` in iOS 7. Supply `nil` or an empty dictionary to opt out of inactive link styling. The default inactive link style is gray and unadorned.
+ */
+@property (nonatomic, strong) NSDictionary *inactiveLinkAttributes;
+
 ///---------------------------------------
 /// @name Acccessing Text Style Attributes
 ///---------------------------------------

diff --git a/TTTAttributedLabel/TTTAttributedLabel.m b/TTTAttributedLabel/TTTAttributedLabel.m
@@ -349,18 +349,24 @@ - (void)commonInit {
     NSMutableDictionary *mutableActiveLinkAttributes = [NSMutableDictionary dictionary];
     [mutableActiveLinkAttributes setObject:[NSNumber numberWithBool:NO] forKey:(NSString *)kCTUnderlineStyleAttributeName];
 
+    NSMutableDictionary *mutableInactiveLinkAttributes = [NSMutableDictionary dictionary];
+    [mutableInactiveLinkAttributes setObject:[NSNumber numberWithBool:NO] forKey:(NSString *)kCTUnderlineStyleAttributeName];
+
     if ([NSMutableParagraphStyle class]) {
         [mutableLinkAttributes setObject:[UIColor blueColor] forKey:(NSString *)kCTForegroundColorAttributeName];
         [mutableActiveLinkAttributes setObject:[UIColor redColor] forKey:(NSString *)kCTForegroundColorAttributeName];
+        [mutableInactiveLinkAttributes setObject:[UIColor grayColor] forKey:(NSString *)kCTForegroundColorAttributeName];
 
         NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
         paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
 
         [mutableLinkAttributes setObject:paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
         [mutableActiveLinkAttributes setObject:paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
+        [mutableInactiveLinkAttributes setObject:paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
     } else {
         [mutableLinkAttributes setObject:(__bridge id)[[UIColor blueColor] CGColor] forKey:(NSString *)kCTForegroundColorAttributeName];
         [mutableActiveLinkAttributes setObject:(__bridge id)[[UIColor redColor] CGColor] forKey:(NSString *)kCTForegroundColorAttributeName];
+        [mutableInactiveLinkAttributes setObject:(__bridge id)[[UIColor grayColor] CGColor] forKey:(NSString *)kCTForegroundColorAttributeName];
 
         CTLineBreakMode lineBreakMode = kCTLineBreakByWordWrapping;
         CTParagraphStyleSetting paragraphStyles[1] = {
@@ -370,12 +376,14 @@ - (void)commonInit {
 
         [mutableLinkAttributes setObject:(__bridge id)paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
         [mutableActiveLinkAttributes setObject:(__bridge id)paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
-
+        [mutableInactiveLinkAttributes setObject:(__bridge id)paragraphStyle forKey:(NSString *)kCTParagraphStyleAttributeName];
+
         CFRelease(paragraphStyle);
     }
 
     self.linkAttributes = [NSDictionary dictionaryWithDictionary:mutableLinkAttributes];
     self.activeLinkAttributes = [NSDictionary dictionaryWithDictionary:mutableActiveLinkAttributes];
+    self.inactiveLinkAttributes = [NSDictionary dictionaryWithDictionary:mutableInactiveLinkAttributes];
 }
 
 - (void)dealloc {
@@ -516,6 +524,7 @@ - (void)addLinksWithTextCheckingResults:(NSArray *)results
         for (NSTextCheckingResult *result in results) {
             [mutableAttributedString addAttributes:attributes range:result.range];
         }
+
         self.attributedText = mutableAttributedString;
         [self setNeedsDisplay];
     }
@@ -1173,6 +1182,27 @@ - (CGSize)intrinsicContentSize {
     return [self sizeThatFits:[super intrinsicContentSize]];
 }
 
+- (void)tintColorDidChange {
+    BOOL isInactive = (CGColorSpaceGetModel(CGColorGetColorSpace([self.tintColor CGColor])) == kCGColorSpaceModelMonochrome);
+
+    NSDictionary *attributesToRemove = isInactive ? self.linkAttributes : self.inactiveLinkAttributes;
+    NSDictionary *attributesToAdd = isInactive ? self.inactiveLinkAttributes : self.linkAttributes;
+
+    NSMutableAttributedString *mutableAttributedString = [self.attributedText mutableCopy];
+    for (NSTextCheckingResult *result in self.links) {
+        [attributesToRemove enumerateKeysAndObjectsUsingBlock:^(NSString *name, __unused id value, __unused BOOL *stop) {
+            [mutableAttributedString removeAttribute:name range:result.range];
+        }];
+
+        if (attributesToAdd) {
+            [mutableAttributedString addAttributes:attributesToAdd range:result.range];
+        }
+    }
+
+    self.attributedText = mutableAttributedString;
+    [self setNeedsDisplay];
+}
+
 #pragma mark - UIResponder
 
 - (BOOL)canBecomeFirstResponder {
@@ -1290,6 +1320,7 @@ - (void)encodeWithCoder:(NSCoder *)coder {
     if ([NSMutableParagraphStyle class]) {
         [coder encodeObject:self.linkAttributes forKey:NSStringFromSelector(@selector(linkAttributes))];
         [coder encodeObject:self.activeLinkAttributes forKey:NSStringFromSelector(@selector(activeLinkAttributes))];
+        [coder encodeObject:self.inactiveLinkAttributes forKey:NSStringFromSelector(@selector(inactiveLinkAttributes))];
     }
     [coder encodeObject:@(self.shadowRadius) forKey:NSStringFromSelector(@selector(shadowRadius))];
     [coder encodeObject:@(self.highlightedShadowRadius) forKey:NSStringFromSelector(@selector(highlightedShadowRadius))];
@@ -1328,6 +1359,10 @@ - (id)initWithCoder:(NSCoder *)coder {
         if ([coder containsValueForKey:NSStringFromSelector(@selector(activeLinkAttributes))]) {
             self.activeLinkAttributes = [coder decodeObjectForKey:NSStringFromSelector(@selector(activeLinkAttributes))];
         }
+
+        if ([coder containsValueForKey:NSStringFromSelector(@selector(inactiveLinkAttributes))]) {
+            self.activeLinkAttributes = [coder decodeObjectForKey:NSStringFromSelector(@selector(inactiveLinkAttributes))];
+        }
     }
 
     if ([coder containsValueForKey:NSStringFromSelector(@selector(shadowRadius))]) {