Custom Segue doesn't Play Sound - objective-c

Question

I made a custom segue and I want it to play sound when changing views. Unfortunately, it doesn't. Method playSound works fine when I use it in View Controller. But i don't want to export it in every View Controller i need. How can i improve my code and why segue doesn't want to play sound?
#import "CustomSegue.h"
#import AVFoundation;
#interface CustomSegue()
#property (nonatomic, strong) AVAudioPlayer *player;
#end
#implementation CustomSegue
#synthesize player;
- (void) perform
{
UIViewController *src = (UIViewController *) self.sourceViewController;
UIViewController *dst = (UIViewController *) self.destinationViewController;
[UIView transitionWithView:src.navigationController.view duration:0.5
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
[src.navigationController pushViewController:dst animated:NO];
}
completion:NULL];
[self playSound];
}
- (void) playSound
{
int r = arc4random_uniform(7) + 1;
NSURL *soundUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:#"%i", r] ofType:#"caf"]];
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
[self.player prepareToPlay];
[self.player play];
}

Answer 1

I bet your custom segue is released (by ARC) before the sound has a chance to play, and your audio player is released with it. The Life Cycle of a Segue is such that it is deallocated immediately after -performis executed.
What you need to do is keep the audio player around for a longer time. One way to do this is to add a (strong) reference to your AVAudioPlayer from an object that is not going to be deallocated for at least as long as the sound will play. For example, place the player in your app delegate, which sticks around as long as the app is running.
Try moving the player property and the -playsound method into your app delegate. The property should look something like:
#property (strong, nonatomic) AVAudioPlayer *player;
Then, in this segue, in place of [self playsound]; make a call to the app delegate with something like:
MyAppDelegate *appDelegate = (MyAppDelegate*)[[UIApplication sharedApplication] delegate];
[appDelegate playsound];