Stop AvAudioPlayer in other View iOS - ios

Question

I would like to stop the audio with AvAudioPlayer but when another view dissapear, There are two views:
The problem is that when view2 disappear, the audio doesn't stop... How I should do?
View1.h
#property (nonatomic, retain) AVAudioPlayer *audioPlayer;
- (IBAction)playAudio:(id)sender;
- (IBAction)stopAudio:(id)sender;
View1.m
- (void)viewDidLoad
{
[super viewDidLoad];
[self playSound];
}
- (void) playSound
{
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"simpsonsTheme"
ofType:#"mp3"]];
NSError *error;
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
//[self.audioPlayer play];
[self playAudio:audioPlayer];
}
- (IBAction)playAudio:(id)sender {
[audioPlayer play];
}
- (IBAction)stopAudio:(id)sender {
[audioPlayer stop];
}
And View2.m
-(void)viewWillDisappear:(BOOL)animated{
view1 = (View1 *)[[UIApplication sharedApplication] delegate];
[view1 stopAudio:view1.audioPlayer];
}
In the View2 I import the View1 to do that.
Thanks

Answer 1

Your app delegate is not a view controller. Maybe you want [[UIApplication sharedApplication] delegate].window.rootViewController.
As you've seen, that's fragile. Instead of having pointers between your viewcontrollers, you could use have looser coupling and use a "stop" NSNotification. It may even be useful elsewhere in your application.
Define
NSString *StopPlayingVideoNotification = #"StopPlayingVideo";
So both views can see it, so put extern NSString *StopPlayingVideoNotification; in one of your header files.
In View1.m's init:
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(stopAudio:) name:StopPlayingVideoNotification object:nil];
Add a dealloc to View1:
-(void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self name:StopPlayingVideoNotification object:nil];
}
In View2.m
-(void)viewWillDisappear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] postNotificationName:StopPlayingVideoNotification object:self];
}