Question

So, how would I make a sound file play and loop only while a certain button is held in (iOS) ? I would also need it to stop when the button was let go? I have tried searching google and have only found forums with people asking but no real answers on how to do it.

Answer 1

use a buttons control events touchdown, touchupinside and touchupoutside:

UIButton *theButton = [[UIButton alloc]initWithFrame:CGRectMake(40.0, 40.0, 200.0, 30.0)];
[theButton setTitle:@"button" forState:UIControlStateNormal];
[theButton setBackgroundColor:[UIColor redColor]];
[theButton addTarget:self action:@selector(startMusic) forControlEvents:UIControlEventTouchDown];
[theButton addTarget:self action:@selector(stopMusic) forControlEvents:UIControlEventTouchUpInside];
[theButton addTarget:self action:@selector(stopMusic) forControlEvents:UIControlEventTouchUpOutside];

edit:
realized your question may have been more about playing sound files?!

there’s different frameworks, you could use AVAudioPlayer:

import framework and define a player

#import <AVFoundation/AVFoundation.h>
AVAudioPlayer *newPlayer;

create your ibactions for buttons in the main file:

-(IBAction)startMusic{
    NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: @"mySoundFile"
                                                          ofType: @"wav"];
    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];
    newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: nil];
    newPlayer.numberOfLoops = -1; // Loop indefinately
    [newPlayer play];
}

and

-(IBAction)stopMusic{
    if(newPlayer isPlaying){
        [newPlayer stop];
    }
    [newPlayer release];
}