Change audio file from UIPicker

I have a UIPickerView set up and running fine. When the user selects a row I want one audio file to start but then if the user selects another row before the first audio file has stopped playing I want it to stop the first and just let the new audio file play. I can do it at present with the code below but both files play at the same time and I cannot find a way of stopping the first one.

Am I going about the wrong way? (I am new to SDK coding)

Any ideas would be appreciated Thanks

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {

    return 1;
}

-(NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component{
    return [list count];
}


-(NSString *开发者_Python百科)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return [list objectAtIndex:row];


}

-(void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    NSString *string = [NSString stringWithFormat:@"%@", [list2 objectAtIndex:row]];
    pickLabel.text = string;


    if(row == 1){



        NSString *path = [[NSBundle mainBundle]

                          pathForResource:@"del08sample"ofType:@"mp3"];

        AVAudioPlayer* theAudio = [[AVAudioPlayer alloc]

                                   initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];

        [theAudio play];


    }

    else if (row == 2){



        NSString *path = [[NSBundle mainBundle]

                          pathForResource:@"icgi03sample"ofType:@"mp3"];

        AVAudioPlayer* theAudio = [[AVAudioPlayer alloc]

                                   initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];


        [theAudio play];


    }

}

I haven't tested this with your code, but when I need to do this I add a simple check to see if there is already an AVAudioPlayer that is playing and stop it before re-allocating. Apple's AVAudioPlayer Class Reference has a whole host of useful info too.

// stop sound if already playing

if (audioPlayer && audioPlayer.isPlaying) {

    [audioPlayer stop];

}