Question

I have successfully scheduled local notifications in my app using the code below:

Class cls = NSClassFromString(@"UILocalNotification");

    if (cls != nil) {

        UILocalNotification *notification = [[cls alloc] init];
        notification.fireDate = self.alarmNotificationDate;
        notification.timeZone = [NSTimeZone defaultTimeZone];

        notification.alertBody = @"Alarm is due";
        notification.alertAction = @"Show Alarm";

        notification.soundName = @"alarm.mp3";

        [[UIApplication sharedApplication] scheduleLocalNotification:notification];
        [notification release];

Where self.alarmNotificationDate is a NSDate assign in another method.

All works fine in the simulator, but when I test on my trusted old iPhone 3G running iOS4 I get the notification, but only with the default sound.

I have tried with different sound files but no success.

Any clue why it could be like this and how to correct it?

Thanks

Answer 1

UILocalNotification does not support mp3. It only supports the formats and containers mentioned on the reference page.

http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/IPhoneOSClientImp/IPhoneOSClientImp.html

Because custom alert sounds are played
by the iOS system-sound facility, they
must be in one of the following audio
data formats:

  Linear PCM
  MA4 (IMA/ADPCM)
  µLaw
  aLaw

You can package the audio data in an
aiff, wav, or caf file.