code to play sound programmatically using a button on the iphone - iphone

Question

I am trying to figure out how to hook up a button to play a sound programmatically without using IB. I have the code to play the sound, but have no way of hooking the button up to play the sound? any help?
here is my code that I'm using:
- (void)playSound
{
NSString *path = [[NSBundle mainBundle] pathForResource:#"boing_1" ofType:#"wav"];
AVAudioPlayer* myAudio = [[AVAudioPlayer alloc]
initWithContentsOfURL:[NSURL fileURLWithPath:path error:NULL]];
myAudio.delegate = self;
myAudio.volume = 2.0;
myAudio.numberOfLoops = 1;
[myAudio play];
}

Answer 1

[button addTarget:self action:#selector(playSound) forControlEvents:UIControlEventTouchUpInside];
UIButton inherits its target/action methods from UIControl.

Answer 2

To hook up the button, make your playSound method the handler for the button's UIControlEventTouchUpInside event. Assuming this is in a view controller, you might want to put this in the viewDidLoad method:
[button addTarget:self action:#selector(playSound) forControlEvents:UIControlEventTouchUpInside];
FYI, you're leaking memory because you're alloc-ing an object but never release-ing it.
You should create a new AVAudioPlayer member for the class to avoid this.
#interface MyViewController : ...
{
...
AVAudioPlayer* myAudio;
...
}
- (void)playSound
{
NSString *path = [[NSBundle mainBundle] pathForResource:#"boing_1" ofType:#"wav"];
[myAudio release];
myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path error:NULL]];
myAudio.delegate = self;
myAudio.volume = 2.0;
myAudio.numberOfLoops = 1;
[myAudio play];
}
Don't forget to put [myAudio release] in your dealloc method.
(I did this without declaring myAudio as a #property, but that's not strictly necessary)