Sprite Kit stop playing music file and start from the beginning - ios

Question

Whenever I present my scene, I want to start playing a music file and stop the music playing from the last time my scene was presented. I'm trying to do it like this.
[self removeActionForKey:#"Music"];
[self runAction:[SKAction repeatActionForever:[SKAction playSoundFileNamed:#"Music.wav" waitForCompletion:YES]] withKey:#"Music"];
Should I use AVAudioPlayer or [SKAction playSoundFileNamed:]?
Also I would like to know if there is a way to play music file forever in all scenes without starting from the beginning.

Answer 1

To play background music in all scenes I will recommend AVAudioPlayer. You can write the code somewhere in your AppDelegate to access from all the scenes. Here is a sample code to achieve this using AVAudioPlayer
// AVAudioPlayer *bgMusicLoop;
- (void)playBackroundMusic:(NSString *)fileName withExtenstion:(NSString *)fileExtension
{
NSString *filePath = [[NSBundle mainBundle] pathForResource:fileName ofType:fileExtension];
NSError *error;
if(bgMusicLoop)
[bgMusicLoop stop];
bgMusicLoop = nil;
bgMusicLoop = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:filePath] error:&error];
if (error) {
NSLog(#"Error in audioPlayer: %#", [error localizedDescription]);
} else {
bgMusicLoop.numberOfLoops = -1;
[bgMusicLoop prepareToPlay];
[bgMusicLoop play];
}
}
- (void)stopBackgroundMusic
{
if(bgMusicLoop)
[bgMusicLoop stop];
bgMusicLoop = nil;
}
- (void)pauseBackgroundMusic
{
if(bgMusicLoop && bgMusicLoop.isPlaying)
[bgMusicLoop pause];
}
- (void)resumeBackgroundMusic
{
if(bgMusicLoop && !bgMusicLoop.isPlaying)
[bgMusicLoop play];
}

Answer 2

For music you should use AVAudioPlayer as using SKAction to play music will block any other actions you might want to run on the scene and its a bit more cumbersome to handle especially if you want to play more sounds along with the music.
Use SKAction to play short sound files (like player jump/fire etc...)
With AVAudioPlayer you can easily set your file to play repeatedly until stopped