does my app display second time notification iOS 9

Question

I am receiving the duplicate Notification. for both Remote notification and Local notifications.

I have used the following code

[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0){
    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}
else{
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:
     (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
}

-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken{
NSString *strDevicetoken = [[NSString alloc]initWithFormat:@"%@",[[[deviceToken description] stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]] stringByReplacingOccurrencesOfString:@" " withString:@""]];
NSLog(@"devicetoken = %@",strDevicetoken);}

i am Receiving Duplicate push notifications all the time.

Dormer

Are duplicates both remote or both local notifications, or do you get a remote notification and then create a duplicate local notification? – Selenography

The code you're showing is for registering for notifications. The real problem will be in either the code that posts local notifications or the code that processes receiving notifications. Edit your question to show those functions. – Flick

@Selenography i mean if i am send Remote notification then device receive 2 same notification and for Local Notification : when i set Local notification same as itis show duplicate.... – Dormer

@VivekAghera i also face this problem. – Millimeter

Answer 1

I think this is a bug on iOS9 somewhere. I have noticed that a large percentage of my app send duplicate notifications. StackoverFlow's iOS app, Apple's, iTunes Connect app and a few others. Pretty sure its the same issue you're having. Maybe file a radar with Apple.

Triangular

Are you sure it's a iOS bug? Not a bug of your push provider? – Anthracnose

Considering it was on multiple apps, which I assume use different push providers, yeah, I am sure it was a bug. It no longer happens. The problem went away. – Triangular

weird, I've got this duplication issue recently on my iPhone 6 with iOS 9.3.2. But only once during the few weeks testing period. We have our own Push Provider, which logs I've investigated and found only one call to APNS ended up with two same push notifications on iOS Notification Center. – Anthracnose

Answer 2

I had a similar issue, and in my case problem was in calling method registerUserNotificationSettings: two times. Seems that calling this method more than 1 time leads to duplicate notifications on iOS 9.

So if you have the same situation, try these two steps:

1. Remove all extra calls of registerUserNotificationSettings: in your code.
2. Then Reinstall the app.

This should fix the issue.

Schluter

Hi, But what about if the code is already in production and I can't to force reinstall? The bug is still reproducing after the update. – Crissum

You can't do anything for users that already have your app on their device, unfortunately. Except maybe inform them about the issue throughout website or/and appstore app description. To fix the issue they will have to reboot their device or reinstall it from the store. – Schluter

Thanks for your answer, But how can you be sure of that? There is any answer from apple? – Crissum

Are you sure it's a iOS bug? Not a bug of your push provider? – Anthracnose

i am getting multiple notifications even i though i m calling registerUserNotificationSettings only once... – Firebrat

I am facing same issue, I am calling the method once in application, I debug the app, the method is calling just only on install – Cardialgia