Closes #2818

ios/RCCNavigationController.m

@@ -128,13 +128,14 @@ NSString const *CALLBACK_ASSOCIATED_ID = @"RCCNavigationController.CALLBACK_ASSO
       }
     }
     
+    NSMutableDictionary *mergedStyle = [NSMutableDictionary dictionaryWithDictionary:navigatorStyle];
+    [mergedStyle setValuesForKeysWithDictionary:actionParams];
+    
+    navigatorStyle = mergedStyle;
+    
     RCCViewController *viewController = [[RCCViewController alloc] initWithComponent:component passProps:passProps navigatorStyle:navigatorStyle globalProps:nil bridge:bridge];
     viewController.controllerId = passProps[@"screenInstanceID"];
     
-    [self processTitleView:viewController
-                     props:actionParams
-                     style:navigatorStyle];
-    
     NSString *backButtonTitle = actionParams[@"backButtonTitle"];
     if (!backButtonTitle) {
       NSNumber *hideBackButtonTitle = [[RCCManager sharedInstance] getAppStyle][@"hideBackButtonTitle"];

ios/RCCViewController.m

@@ -650,6 +650,10 @@ const NSInteger TRANSPARENT_NAVBAR_TAG = 78264803;
       self.navigationItem.titleView.clipsToBounds = YES;
     }
   }
+    
+    [self processTitleView:viewController
+                     props:self.navigatorStyle
+                     style:self.navigatorStyle];
 
   #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_10_3
   if (@available(iOS 11.0, *)) {
@@ -672,6 +676,21 @@ const NSInteger TRANSPARENT_NAVBAR_TAG = 78264803;
   #endif
 }
 
+-(void)processTitleView:(UIViewController*)viewController
+                  props:(NSDictionary*)props
+                  style:(NSDictionary*)style {
+    BOOL isSetSubtitleBool = props[@"isSetSubtitle"] ? [props[@"isSetSubtitle"] boolValue] : NO;
+    RCCTitleViewHelper *titleViewHelper = [[RCCTitleViewHelper alloc] init:viewController
+                                                      navigationController:self.navigationController
+                                                                     title:props[@"title"]
+                                                                  subtitle:props[@"subtitle"]
+                                                            titleImageData:props[@"titleImage"]
+                                                             isSetSubtitle:isSetSubtitleBool];
+    
+    [titleViewHelper setup:style];
+    
+}
+
 - (void) viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
   [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
   RCCCustomTitleView* customNavBar = (RCCCustomTitleView*) self.navigationItem.titleView;