iphone - How do you make a sound file play automatically thought an iOS app and loop using Objective-C?

Question

I am making a game for iPhone using objective-c. I have the music I want to play in a file in the project. I need to know how to make it begin playing when the app launches, and loop at the end. Does anyone know how to do this? Code examples would be great! Thanks.

Answer 1

you can use AVAudioPlayer in App Delegate.

First in your App Delegate .h file add these lines:

#import <AVFoundation/AVFoundation.h>

and these one:

AVAudioPlayer *musicPlayer;

In your .m file add this method:

- (void)playMusic {

    NSString *musicPath = [[NSBundle mainBundle] pathForResource:@"phone_loop" ofType:@"wav"];
    NSURL *musicURL = [NSURL fileURLWithPath:musicPath];

    musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:musicURL error:nil];
    [musicPlayer setNumberOfLoops:-1];   // Negative number means loop forever

    [musicPlayer prepareToPlay];
    [musicPlayer play];
}

Finally call it in the didFinishLaunchingWithOptions method:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  ...
  [self playMusic];
  ...
}

If you want to stop the music just:

[musicPlayer stop];

Aditionally you can check the Apple Documentation for AVAudioPlayer delegate for Handling Audio Interruptions http://developer.apple.com/library/ios/#DOCUMENTATION/AVFoundation/Reference/AVAudioPlayerDelegateProtocolReference/Reference/Reference.html

PS: Remember to import the AVFoundation Framework to your project.