How to know if the push notification permission alert has already been shown

Question

I want to implement a custom screen that informs my users why I'm about to ask for push notification permissions. After they press a button in that custom screen I present the iOS push notification permission dialog with [[UIApplication sharedApplication] registerForRemoteNotificationTypes:

I only want to show this custom screen once if the user hasn't already seen the push notification permission dialog. I cannot use [[UIApplication sharedApplication] enabledRemoteNotificationTypes] == UIRemoteNotificationTypeNone as this will also return 'none' if the user decided to not allow push notifications.

Any ideas anyone?

Answer 1

You could use NSUserDefaults :

#define kPushNotificationRequestAlreadySeen @"PushNotificationRequestAlreadySeen"  if(![[NSUserDefaults standardUserDefaults] boolForKey:kPushNotificationRequestAlreadySeen]) {      // Notify the user why you want to have push notifications     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:... delegate:self ...];     [alertView show];      [[NSUserDefaults standardUserDefaults] setBool:YES forKey:kPushNotificationRequestAlreadySeen]; } else {     // Already allowed -> register without notifying the user     [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound]; } 

And

- (void)alertView:(UIAlertView*)alertView didDismissWithButtonIndex:(NSInteger)index {     // Actually registering to push notifications     [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound]; }