fix(ios): tintColor not working for TabbedBar in iOS 13 (#11329)

* fix(ios): tintColor not working for TabbedBar in  iOS 13

* fix(ios): added doc

apidoc/Titanium/UI/ButtonBar.yml

@@ -76,6 +76,31 @@ properties:
             </Alloy>
     type: [Array<String>, Array<BarItemType>]
 
+  - name: textColor
+    summary: Color of title of button, as a color name or hex triplet.
+    description: |
+        For information about color values, see the "Colors" section of <Titanium.UI>.
+    type: String
+    platforms: [iphone, ipad]
+    since: "9.0.0"
+
+  - name: selectedTextColor
+    summary: Color of title of button when it is selected, as a color name or hex triplet.
+    description: |
+        For information about color values, see the "Colors" section of <Titanium.UI>.
+    type: String
+    platforms: [iphone, ipad]
+    since: "9.0.0"
+
+  - name: selectedButtonColor
+    summary: Color of selected button, as a color name or hex triplet.
+    description: |
+        For information about color values, see the "Colors" section of <Titanium.UI>.
+    type: String
+    platforms: [iphone, ipad]
+    since: "9.0.0"
+    osver: {ios: {min: "13.0"}}
+
 examples:
   - title: Simple 3 button button bar
     example: |

iphone/Classes/TiUIButtonBar.m

@@ -59,6 +59,42 @@ - (id)accessibilityElement
   return [self segmentedControl];
 }
 
+- (UIColor *)reverseColorOf:(UIColor *)oldColor
+{
+  CGColorRef oldCGColor = oldColor.CGColor;
+
+  int numberOfComponents = CGColorGetNumberOfComponents(oldCGColor);
+  // can not invert - the only component is the alpha
+  if (numberOfComponents == 1) {
+    return [UIColor colorWithCGColor:oldCGColor];
+  }
+
+  const CGFloat *oldComponentColors = CGColorGetComponents(oldCGColor);
+  CGFloat newComponentColors[numberOfComponents];
+
+  int i = numberOfComponents - 1;
+  newComponentColors[i] = oldComponentColors[i]; // alpha
+  while (--i >= 0) {
+    newComponentColors[i] = 1 - oldComponentColors[i];
+  }
+
+  CGColorRef newCGColor = CGColorCreate(CGColorGetColorSpace(oldCGColor), newComponentColors);
+  UIColor *newColor = [UIColor colorWithCGColor:newCGColor];
+  CGColorRelease(newCGColor);
+
+  //For the GRAY colors 'Middle level colors'
+  CGFloat white = 0;
+  [oldColor getWhite:&white alpha:nil];
+
+  if (white > 0.3 && white < 0.67) {
+    if (white >= 0.5)
+      newColor = [UIColor darkGrayColor];
+    else if (white < 0.5)
+      newColor = [UIColor blackColor];
+  }
+  return newColor;
+}
+
 // For regression #1880.  Because there are essentially TWO kinds of 'width' going on with tabbed/button bars
 // (width of all elements, width of the proxy) we assume that if the user has set the width of the bar completely,
 // AND the width of the proxy is undefined, they want magic!
@@ -84,12 +120,53 @@ - (void)setTabbedBar:(BOOL)newIsTabbed;
   [[self segmentedControl] setMomentary:!newIsTabbed];
 }
 
+- (void)setTintColor_:(id)value
+{
+  UIColor *color = [[TiUtils colorValue:value] color];
+
+  if ([TiUtils isIOSVersionLower:@"13.0"]) {
+    [[self segmentedControl] setTintColor:color];
+    return;
+  }
+
+  UIColor *newColor = [self reverseColorOf:color];
+  [[self segmentedControl] setTitleTextAttributes:@{ NSForegroundColorAttributeName : color } forState:UIControlStateNormal];
+  [[self segmentedControl] setTitleTextAttributes:@{ NSForegroundColorAttributeName : newColor } forState:UIControlStateSelected];
+
+  [[self segmentedControl] setSelectedSegmentTintColor:color];
+}
+
 - (void)setBackgroundColor_:(id)value
 {
   TiColor *color = [TiUtils colorValue:value];
-  [[self segmentedControl] setTintColor:[color _color]];
+  [[self segmentedControl] setBackgroundColor:[color _color]];
 }
 
+- (void)setTextColor_:(id)value
+{
+  UIColor *color = [[TiUtils colorValue:value] color];
+
+  [[self segmentedControl] setTitleTextAttributes:@{ NSForegroundColorAttributeName : color } forState:UIControlStateNormal];
+}
+
+- (void)setSelectedTextColor_:(id)value
+{
+  UIColor *color = [[TiUtils colorValue:value] color];
+
+  [[self segmentedControl] setTitleTextAttributes:@{ NSForegroundColorAttributeName : color } forState:UIControlStateSelected];
+}
+
+#if IS_SDK_IOS_13
+- (void)setSelectedButtonColor_:(id)value
+{
+  if (![TiUtils isIOSVersionOrGreater:@"13.0"]) {
+    return;
+  }
+  UIColor *color = [[TiUtils colorValue:value] color];
+  [[self segmentedControl] setSelectedSegmentTintColor:color];
+}
+#endif
+
 - (void)setIndex_:(id)value
 {
   selectedIndex = [TiUtils intValue:value def:-1];