Me and my team suffering from one month because of this issue, problem is apple push notifications are working for some time in all installed devices, but after that even one device also not getting any notifications, this is happening continuously please solve this problem. Where is that problem and how to resolve this issue, please help me. I've written the below code in didFinishLaunchingWithOptions
method of AppDelegate
UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound);
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes categories:nil];
[application registerUserNotificationSettings:settings];
[application registerForRemoteNotifications];