How do I stop a sound when a new sound button is pressed - xcode

Question

I'm new to Xcode and I'm having an issue, if you click the sound buttons multiple times they overlap each other. How would I set my code so that if you click a button while a sound is playing it will stop the current sound playing and start the new one.
If you could post the code it would be much appreciated.
Thanks,
Dominick
Here is a copy of my current code:
#import "Sound3ViewController.h"
#implementation Sound3ViewController
-(IBAction)playnow:(id)sender;{
soundFile = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"winning"
ofType:#"mp3"]];
sound = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFile error:nil];
sound.delegate = self;
[sound play];
}
- (IBAction)play2:(id)sender {
soundFile = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"onadrug"
ofType:#"mp3"]];
sound = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFile error:nil];
sound.delegate = self;
[sound play];
}
- (void)dealloc
{
[super dealloc];
[sound release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
}
*/
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end

Answer 1

I would suggest you to disallow playing the sound with a variable and schedule an action that allows it again after the duration of the file. Eg:
boolean allowed = true
-(IBAction)playnow:(id)sender
{
if (allowed) { // <--- ADD THIS
allowed = false;
soundFile = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"winning"
ofType:#"mp3"]];
sound = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFile error:nil];
sound.delegate = self;
[sound play];
NSInvocation *invocation = [[NSInvocation alloc] init];
[invocation setTarget:self];
[invocation setSelector:#selector(allowPlaying)];
[NSTimer scheduledTimerWithTimeInterval:[sound duration] invocation:invocation repeats:NO];
} // <-- AND THIS
}
-(void)allowPlaying
{
allow = true;
}
Didn't test it since just wrote on the fly but you've got the general idea..

Answer 2

I'm new to objC also, so I'm not sure this is correct, but try this:
#import "Sound3ViewController.h"
#implementation Sound3ViewController
-(IBAction)playnow:(id)sender;{
soundFile = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"winning"
ofType:#"mp3"]];
// NEW STUFF
if (sound) {
if ([sound playing]) {
[sound stop];
}
[sound release];
}
sound = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFile error:nil];
sound.delegate = self;
[sound play];
}
- (IBAction)play2:(id)sender {
soundFile = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"onadrug"
ofType:#"mp3"]];
if (sound) {
if ([sound playing]) {
[sound stop];
}
[sound release];
}
sound = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFile error:nil];
sound.delegate = self;
[sound play];
}
- (void)dealloc
{
[super dealloc];
if (sound) {
[sound release];
}
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
}
*/
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end

Answer 3

// in .h file
#import "AVFoundation/AVAudioPlayer.h"
//set delegate
#interface SamplesoundViewController : UIViewController <AVAudioPlayerDelegate>{
AVAudioPlayer *player1;
AVAudioPlayer *player2;
...
...
}
#property (nonatomic, retain) AVAudioPlayer *player1;
#property (nonatomic, retain) AVAudioPlayer *player2;
-(IBAction)soundfirst;
-(IBAction)soundsecond;
-(IBAction)Newmethodname;
// in .m file
#implementation SamplesoundViewController
#synthesize player1,player2;
-(IBAction)soundfirst{
NSString *path = [[NSBundle mainBundle] pathForResource:#"soundfilefirst" ofType:#"mp3"];
player1=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
player1.delegate=self;
[player1 play];
[self performSelector:#selector(soundsecond) withObject:nil afterDelay:0.90];
}
-(IBAction)soundsecond{
[player1 stop];
NSString *path = [[NSBundle mainBundle] pathForResource:#"Soundfilesecond" ofType:#"mp3"];
player2=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
player2.delegate=self;
[player2 play];
[self performSelector:#selector(Newmethodname) withObject:nil afterDelay:1];
}
-(IBAction)Newmethodname{
[player2 stop];
//write your code here
}