ask user for permission to show alert when firing local notification - ios

Question

I want to show an alert when the local notification is fired, but for that I have to ask for permission, as it says to me when I run the app on my iPhone:
Attempting to schedule a local notification {fire date = Friday 13 June 2014 12 h 10 min 27 s Central European Summer Time, time zone = (null), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Friday 13 June 2014 12 h 10 min 27 s Central European Summer Time, user info = (null)} with an alert but haven't received permission from the user to display alerts
How can I do that?
Here´s the code as it is now:
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
localNotif.fireDate = [[NSDate date] dateByAddingTimeInterval:timeUntilNotification];
localNotif.soundName = UILocalNotificationDefaultSoundName;
localNotif.alertBody = #"ZEIT!";
localNotif.alertAction = #"Show me the Timer!";
localNotif.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] +1;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

Answer 1

add this code, it will show a alert view to ask user for permission.
if ([UIApplication instancesRespondToSelector:#selector(registerUserNotificationSettings:)]) {
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeSound|UIUserNotificationTypeBadge
categories:nil]];
}
you can add this code in application:didFinishLaunchingWithOptions; method, so that the app will ask your user when they launch the app, or you can add this code when you set Local Notification, it's up to you.

Answer 2

蘇健豪's answer is good.
In Swift it looks like this:
let registerUserNotificationSettings = UIApplication.instancesRespondToSelector("registerUserNotificationSettings:")
if registerUserNotificationSettings {
var types: UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Sound
UIApplication.sharedApplication().registerUserNotificationSettings(UIUserNotific‌​ationSettings(forTypes: types, categories: nil))
}
Also see here: Ask for User Permission to Receive UILocalNotifications in iOS 8

Answer 3

//register notifications
if([application respondsToSelector:#selector(registerUserNotificationSettings:)]) //ios 8+
{
[application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeBadge|UIUserNotificationTypeSound categories:nil]];
[application registerForRemoteNotifications];
}
else // ios 7 or less
{
[application registerForRemoteNotificationTypes:UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge];
}

Answer 4

In the swift language....
var type = UIUserNotificationType.Badge | UIUserNotificationType.Alert | UIUserNotificationType.Sound;
var setting = UIUserNotificationSettings(forTypes: type, categories: nil);
UIApplication.sharedApplication().registerUserNotificationSettings(setting);
UIApplication.sharedApplication().registerForRemoteNotifications();

Answer 5

Try this for Objective-C
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
NSLog(#"didFinishLaunchingWithOptions");
if ([UIApplication instancesRespondToSelector:#selector(registerUserNotificationSettings:)]) {
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert|UIUserNotificationTypeSound categories:nil]];
}
return YES;
}