I have an audio player and I want to show the current time of the the playback. I'm using a custom play class.

The app downloads the mp3 to a file then plays from the file when 5% has been downloaded. I have a progress view update as the file plays and update a label on each call to the progress view. However, this is jerky... sometimes even going backward a digit or two.

I was considering using an NSTimer to smooth things out. I would be fired every second to a method and pass the percentage played figure to the method then update the label.

First, does this seem reasonable?

Second, how do I pass the percentage (a float) over to the target of the timer. Right now I am putting the percent played into a dictionary but this seems less than optimal.

This is what is called update the progress bar:

-(void)updateAudioProgress:(Percentage)percent {
    audio = percent;
    if (!seekChanging) slider.value = percent;

    NSMutableDictionary *myDictionary = [[NSMutableDictionary alloc] init];  

    [myDictionary setValue:[NSNumber numberWithFloat:percent] forKey:@"myPercent"];


    [NSTimer scheduledTimerWithTimeInterval:5
                                     target:self 
                                   selector:@selector(myTimerMethod:) 
                                   userInfo:myDictionary 
                                    repeats:YES];
    [myDictionary release];
}

This is called first after 5 seconds but then updates each time the method is called.

As always, comments and pointers appreciated.