How do I stop the background music in another view in Xcode? - objective-c

Question

So I have a background music playing in one view, then I press the button and go to another view, the background music in another view run as well.
Then I have two background music playing. I want to stop music from the previous view.
So here is the .h code for the first view:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#interface ViewController : UIViewController<AVAudioPlayerDelegate>{
AVAudioPlayer *startingMusic;
}
-(IBAction)StartGame:(id)sender;
So here is the .m code for the first view:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
-(IBAction)StartGame:(id)sender{
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *music = [[NSBundle mainBundle] pathForResource:#"Morning_Walk" ofType:#"mp3"];
startingMusic=[[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:music] error:NULL];
startingMusic.delegate=self;
startingMusic.numberOfLoops=-1;
[startingMusic play];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
here is the .h code for the second view:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
#interface StageOne : UIViewController<AVAudioPlayerDelegate>
AVAudioPlayer *gameMusic;
}
here is the .m code for the second view:
#import "StageOne.h"
#interface StageOne ()
#end
#implementation StageOne
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
NSString *music = [[NSBundle mainBundle] pathForResource:#"Green_Hills" ofType:#"mp3"];
gameMusic=[[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:music] error:NULL];
gameMusic.delegate=self;
gameMusic.numberOfLoops=-1;
[gameMusic play];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
Thanks You so much!

Answer 1

This is normal behavior, as your first controller are still loaded
Try this:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear: animated];
NSString *music = [[NSBundle mainBundle] pathForResource:#"Green_Hills" ofType:#"mp3"];
gameMusic=[[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL fileURLWithPath:music] error:NULL];
gameMusic.delegate=self;
gameMusic.numberOfLoops=-1;
[gameMusic play];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear: animated];
gameMusic.delegate = nil;
[gameMusic stop];
gameMusic = nil;
}