[V2][IOS] fixes noBorder issue with largeTitle (#4310)

* fixes noBorder issue with largeTitle

* fixes issue that change navigationbar title color to default

Author: mohammadalijf

lib/ios/RNNNavigationControllerPresenter.m

@@ -104,7 +104,11 @@ - (void)mergeOptions:(RNNNavigationOptions *)newOptions currentOptions:(RNNNavig
 		[navigationController rnn_setBackButtonColor:newOptions.topBar.backButton.color.get];
 	}
 
-	[navigationController rnn_setNavigationBarLargeTitleFontFamily:[newOptions.topBar.largeTitle.fontFamily getWithDefaultValue:nil] fontSize:[newOptions.topBar.largeTitle.fontSize getWithDefaultValue:nil] color:[newOptions.topBar.largeTitle.color getWithDefaultValue:nil]];
+
+	RNNLargeTitleOptions *largteTitleOptions = newOptions.topBar.largeTitle;
+	if (largteTitleOptions.color.hasValue || largteTitleOptions.fontSize.hasValue || largteTitleOptions.fontFamily.hasValue) {
+		[navigationController rnn_setNavigationBarLargeTitleFontFamily:[newOptions.topBar.largeTitle.fontFamily getWithDefaultValue:nil] fontSize:[newOptions.topBar.largeTitle.fontSize getWithDefaultValue:nil] color:[newOptions.topBar.largeTitle.color getWithDefaultValue:nil]];
+	}
 
 	[navigationController rnn_setNavigationBarFontFamily:[newOptions.topBar.title.fontFamily getWithDefaultValue:nil] fontSize:[newOptions.topBar.title.fontSize getWithDefaultValue:nil] color:[newOptions.topBar.title.color getWithDefaultValue:nil]];
 

lib/ios/UINavigationController+RNNOptions.m

@@ -36,12 +36,9 @@ - (void)rnn_hideBarsOnScroll:(BOOL)hideOnScroll {
 
 - (void)rnn_setNavigationBarNoBorder:(BOOL)noBorder {
 	if (noBorder) {
-		self.navigationBar
-		.shadowImage = [[UIImage alloc] init];
-		[self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
+		[self.navigationBar setShadowImage:[[UIImage alloc] init]];
 	} else {
-		self.navigationBar
-		.shadowImage = nil;
+		[self.navigationBar setShadowImage:nil];
 	}
 }
 
@@ -114,7 +111,7 @@ - (void)rnn_setBackButtonIcon:(UIImage *)icon withColor:(UIColor *)color title:(
 
 	backItem.title = title ? title : lastViewControllerInStack.navigationItem.title;
 	backItem.tintColor = color;
-
+	
 	lastViewControllerInStack.navigationItem.backBarButtonItem = backItem;
 }