Help! Audio stopping problem.

[jjgoldman]

Hi guys, new to these forums and ios development.

I am trying to create a simple app which has a button which when touched will play a random sound from a series. When I click the button, it does play the sound, but when touched again it will play the second sound over the first. How can I make the previous song stop when the button is touched again?

Thanks in advance- below is the code.

- (IBAction)randomsound {
	NSString *title = nil;
	NSString *path = nil;
	AVAudioPlayer *audio = nil;
  
	
	int Number = arc4random() % 2;
	switch (Number) {
		case 0:
			path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];		
            [audio stop];
            [audio play]; 
			break;
			
		case 1:
			path = [[NSBundle mainBundle] pathForResource:@"sound2" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];	
            [audio stop];
            [audio play]; 
			break;
			
    
			break;
		default:
			break;
            
                            
	}
	
	
}

[veterinarian2008]

Originally Posted by jjgoldman

Hi guys, new to these forums and ios development.

I am trying to create a simple app which has a button which when touched will play a random sound from a series. When I click the button, it does play the sound, but when touched again it will play the second sound over the first. How can I make the previous song stop when the button is touched again?

Thanks in advance- below is the code.

- (IBAction)randomsound {
	NSString *title = nil;
	NSString *path = nil;
	AVAudioPlayer *audio = nil;
  
	
	int Number = arc4random() % 2;
	switch (Number) {
		case 0:
			path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];		
            [audio stop];
            [audio play]; 
			break;
			
		case 1:
			path = [[NSBundle mainBundle] pathForResource:@"sound2" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];	
            [audio stop];
            [audio play]; 
			break;
			
    
			break;
		default:
			break;
            
                            
	}
	
	
}

Look at the logic of your code. You have stop and play in the same actions which it won't do anything since you call it stop and then play. Of curse the audio will keep playing.

[veterinarian2008]

Originally Posted by veterinarian2008

Look at the logic of your code. You have stop and play in the same actions which it won't do anything since you call it stop and then play. Of curse the audio will keep playing.

If I was you, I would declare 2 different AVAudioPlayers. One for the first and the other one for the second.

[jjgoldman]

ah ok thanks. I will give it a try and post back with my results.

[jjgoldman]

If I was you, I would declare 2 different AVAudioPlayers. One for the first and the other one for the second.

As I said, Im very new to this whole thing. I'm not entirly sure what you meant but gave it ago :s, what I tried didn't work, could you (or someone else) help me correct this.

Thanks again!

- (IBAction)randomsound {
	NSString *title = nil;
	NSString *path = nil;
	AVAudioPlayer *audio = nil;
    AVAudioPlayer *stopaudio;
  
	
	int Number = arc4random() % 2;
	switch (Number) {
		case 0:
			path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            stopaudio =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            [stopaudio stop];
            [audio play]; 
			break;
			
		case 1:
			path = [[NSBundle mainBundle] pathForResource:@"sound2" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];	
            stopaudio =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            [stopaudio stop];
            [audio play]; 
			break;
			
    
			break;
		default:
			break;
            
                            
	}
	
	
}

[veterinarian2008]

Originally Posted by jjgoldman

As I said, Im very new to this whole thing. I'm not entirly sure what you meant but gave it ago :s, what I tried didn't work, could you (or someone else) help me correct this.

Thanks again!

- (IBAction)randomsound {
	NSString *title = nil;
	NSString *path = nil;
	AVAudioPlayer *audio = nil;
    AVAudioPlayer *stopaudio;
  
	
	int Number = arc4random() % 2;
	switch (Number) {
		case 0:
			path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            stopaudio =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            [stopaudio stop];
            [audio play]; 
			break;
			
		case 1:
			path = [[NSBundle mainBundle] pathForResource:@"sound2" ofType:@"wav"];
			audio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];	
            stopaudio =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            [stopaudio stop];
            [audio play]; 
			break;
			
    
			break;
		default:
			break;
            
                            
	}
	
	
}

This thread has been answered before:


http://www.iphonedevsdk.com/forum/ip...tion-help.html

Just read over. Your not too far. Also, those switch statements are sometimes a bit tricky. Ill rather use and "if" statement.

Good luck

[fhsjaagshs]

You need AVAudioSession:

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setDelegate:self];

I'd also like to mention that you must release the audio in the dealloc method because:
1. You don't want memory leaks
2. Releasing the AVAudioPlayer causes the audio to stop (Audio is loaded to the memory (RAM), releasing removes something from the memory)