call "registerForRemoteNotificationTypes" in "applicationDidBecomeActive"

Question

Is it bad practice to call registerForRemoteNotificationTypes in applicationDidBecomeActive? I was calling it in applicationDidFinishLoading, but with multitasking, the registration was not happening for days to weeks for some users.

I'd like to call the registration more often, but don't want to call it this often if it's bad practice.

Answer 1

It is not bad practice.

In fact Apple documentation says this: Apple documentation

If your application has previously registered, calling registerForRemoteNotificationTypes: results in iOS passing the device token to the delegate immediately without incurring additional overhead.

Answer 2

Device tokens can change.

Your app needs to reregister every time it is launched in iOS by calling the registerForRemoteNotificationTypes: method of UIApplication.

Based on Local and Push Notification Programming Guide