feat(ios): add tintColor option to bottomTabs

Expose `UITabBar.tintColor` via a new `tintColor` property on
`OptionsBottomTabs`. This controls the color of the selected tab's
icon, which is especially useful for overriding the default system
blue on tabs created with `bottomTab.role` (UITabBarSystemItem).

Applied in both `applyOptions` (initial render) and `mergeOptions`
(dynamic updates).

iOS only; no Android changes.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: IsaacIsrael

ios/BottomTabsBasePresenter.mm

@@ -35,6 +35,11 @@ - (void)applyOptions:(RNNNavigationOptions *)options {
                    translucent:[withDefault.bottomTabs.translucent withDefault:NO]];
     [self applyTabBarBorder:withDefault.bottomTabs];
     [self applyTabBarShadow:withDefault.bottomTabs.shadow];
+
+    UIColor *tintColor = [withDefault.bottomTabs.tintColor withDefault:nil];
+    if (tintColor) {
+        self.tabBar.tintColor = tintColor;
+    }
 }
 
 - (void)mergeOptions:(RNNNavigationOptions *)mergeOptions
@@ -94,6 +99,10 @@ - (void)mergeOptions:(RNNNavigationOptions *)mergeOptions
     if (mergeOptions.bottomTabs.shadow.hasValue) {
         [self applyTabBarShadow:withDefault.bottomTabs.shadow];
     }
+
+    if (mergeOptions.bottomTabs.tintColor.hasValue) {
+        self.tabBar.tintColor = mergeOptions.bottomTabs.tintColor.get;
+    }
 }
 
 - (RNNBottomTabsController *)tabBarController {

ios/RNNBottomTabsOptions.h

@@ -23,6 +23,7 @@
 @property(nonatomic, strong) Number *borderWidth;
 @property(nonatomic, strong) RNNShadowOptions *shadow;
 @property(nonatomic, strong) BottomTabsAttachMode *tabsAttachMode;
+@property(nonatomic, strong) Color *tintColor;
 
 - (BOOL)shouldDrawBehind;
 

ios/RNNBottomTabsOptions.mm

@@ -26,6 +26,7 @@ - (instancetype)initWithDict:(NSDictionary *)dict {
     self.borderColor = [ColorParser parse:dict key:@"borderColor"];
     self.borderWidth = [NumberParser parse:dict key:@"borderWidth"];
     self.shadow = [[RNNShadowOptions alloc] initWithDict:dict[@"shadow"]];
+    self.tintColor = [ColorParser parse:dict key:@"tintColor"];
 
     return self;
 }
@@ -68,6 +69,9 @@ - (void)mergeOptions:(RNNBottomTabsOptions *)options {
     if (options.borderWidth.hasValue)
         self.borderWidth = options.borderWidth;
 
+    if (options.tintColor.hasValue)
+        self.tintColor = options.tintColor;
+
     [self.shadow mergeOptions:options.shadow];
 }
 

src/interfaces/Options.ts

@@ -999,6 +999,16 @@ export interface OptionsBottomTabs {
    * Control the shadow of the Bottom tabs bar
    */
   shadow?: ShadowOptions;
+  /**
+   * Set the tint color applied to the selected tab's icon
+   * and system-provided items. Maps to `UITabBar.tintColor`.
+   *
+   * Useful for overriding the default blue tint on system
+   * items created via `bottomTab.role`.
+   *
+   * #### (iOS specific)
+   */
+  tintColor?: Color;
 }
 
 export interface ShadowOptions {