fix nav bar bg

@@ -6,6 +6,7 @@
 //
 
 import UIKit
+import SwiftEventBus
 
 @objc public class LoyaltyAnalysisViewController: UIViewController {
     

@@ -45,13 +45,19 @@ extension UIViewController {
         self.navigationItem.title = ""
 
         // Add backgroundColor
-        let navigationBarAppearance = UINavigationBarAppearance()
-        navigationBarAppearance.configureWithDefaultBackground()
-        navigationBarAppearance.backgroundColor = .white
-
-        navigationItem.standardAppearance = navigationBarAppearance
-        navigationItem.compactAppearance = navigationBarAppearance
-        navigationItem.scrollEdgeAppearance = navigationBarAppearance
+        if #available(iOS 15, *) {
+            let navigationBarAppearance = UINavigationBarAppearance()
+            navigationBarAppearance.configureWithDefaultBackground()
+            navigationBarAppearance.backgroundColor = .white
+
+            navigationItem.standardAppearance = navigationBarAppearance
+            navigationItem.compactAppearance = navigationBarAppearance
+            navigationItem.scrollEdgeAppearance = navigationBarAppearance
+        } else {
+            navigationController?.navigationBar.barTintColor = UIColor.white
+            navigationController?.navigationBar.tintColor = UIColor.white
+        //     navigationController?.navigationBar.isTranslucent = false
+        }
     }