minor readme update

README.md

@@ -332,6 +332,23 @@ When tracking opened push notification, you can also decrement the badge count o
         }
     }
 ```
+
+Additionally, if you just want to reset the badge count to zero when the app is opened(note that this could be from
+the user just opening the app independent of the push message), you can add the following code to
+the `applicationDidBecomeActive` method in the app delegate:
+
+```swift
+
+func applicationDidBecomeActive(_ application: UIApplication) {
+    // reset the badge count on the app icon
+    if #available(iOS 16.0, *) {
+        UNUserNotificationCenter.current().setBadgeCount(0)
+    } else {
+        UIApplication.shared.applicationIconBadgeNumber = 0
+    }
+}
+```
+
 Once your first push notifications are sent and opened, you should start to see _Opened Push_ metrics within your Klaviyo dashboard.
 
 #### Deep Linking