UISwitch with AVAudioPlayer - iphone

Question

Have problem in playsound section.When i turn switch off - soundchecker change his value to NO,but audioplayer not stopping.What's wrong guys?
-(IBAction)Settings {
if(settingsview==nil) {
settingsview=[[UIView alloc] initWithFrame:CGRectMake(10, 130, 300, 80)];
[settingsview setBackgroundColor:[UIColor clearColor]];
UILabel *labelforSound = [[UILabel alloc]initWithFrame:CGRectMake(15, 25, 70, 20)];
[labelforSound setFont:[UIFont systemFontOfSize:18]];
[labelforSound setBackgroundColor:[UIColor clearColor]];
[labelforSound setText:#"Sound"];
SoundSwitch = [[UISwitch alloc]initWithFrame:CGRectMake(10, 50, 20, 20)];
SoundSwitch.userInteractionEnabled = YES;
if(soundchecker == YES) [SoundSwitch setOn:YES];
else [SoundSwitch setOn:NO];
[SoundSwitch addTarget:self action:#selector(playsound:) forControlEvents:UIControlEventValueChanged];
[settingsview addSubview:labelforSound];
[settingsview addSubview:SoundSwitch];
[self.view addSubview:settingsview];
}
else {
[settingsview removeFromSuperview];
[settingsview release];
settingsview=nil;
}
}
//-------Playsound------------------//
-(void)playsound:(id) sender {
NSString *pathtosong = [[NSBundle mainBundle]pathForResource:#"Teachme" ofType:#"mp3"];
AVAudioPlayer* audioplayer = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:pathtosong] error:NULL];
if(SoundSwitch.on) {
[audioplayer play];
soundchecker = YES;
}
if(!SoundSwitch.on) {
[audioplayer stop];
soundchecker = NO;
}
}

Answer 1

It's not stopping because every time that playsound is called you are creating a NEW AVAudioPlayer. So when you call [audioplayer stop], you are not calling it on the AVAudioPlayer that is currently playing, you are calling it on a new one you just created.
You could add the AVAudioPlayer variable to the header of your class (as a property if you want). Then you could do this:
-(void)playsound:(id) sender
{
if(SoundSwitch.on)
{
if(!audioPlayer) {
NSString *pathtosong = [[NSBundle mainBundle]pathForResource:#"Teachme" ofType:#"mp3"];
audioplayer = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:pathtosong] error:nil];
}
[audioplayer play];
soundchecker = YES;
} else {
if(audioPlayer && audioPlayer.isPlaying) {
[audioplayer stop];
}
soundchecker = NO;
}
}