release sounds and memory manegment

hello in my application i use the code below to handle and play sounds, I want to know if i need to release any things or nothing to do.

the code :

 -(void) playNote: (NSString*) note type: (NSString*) type
{

CFURLRef        soundFileURLRef;
SystemSoundID   soundFileObject;
CFBundleRef mainBundle;
mainBundle = CFBundleGetMainBundle ();
    // Get the URL to the sound file to play
    soundFileURLRef  =  CFBundleCopyResourceURL (mainBundle,
            (CFStringRef)note,
            (CFStringRef)type,
            NULL);

    // Create a system sound object representing the sound file
    AudioServicesCreateSystemSoundID (soundFileURLRef, &soundFileObject);

    AudioServicesPlaySystemSound (soundFileObject);
}

T开发者_Python百科hanks ,

You would need to call AudioServicesDisposeSystemSoundID to clean up when you are done with the sound.

In your header:

@interface xyz
{
  SystemSoundID soundFileObject;
};

in your .m file, create an init method (if you don't have one):

-(id)init
{
   if ( (self = [super init]) )
   {
     AudioServicesCreateSystemSoundID (soundFileURLRef, &soundFileObject);
   }
   return self;
}

in your dealloc

-(void)dealloc
{
   AudioServiceDisposeSystemSoundID(soundFileObject);
   [super dealloc];
}

you should declare the soundFileURLRef also as a ivar.