How many lines of code required to play an Audio file?

While looking at codes required to play an audio file, I found huge differences between different books/resources.

In the book iOS 4 Programming Cookbook, it talks about:

1. Adding " <AVAudioPlayerDelegate> " to the .h file of the ViewController
2. Create 2 methods:

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag;

- (void) startPlayingAudio;

3. in viewDidUnload, you have to do the following:

    if (self.audioPlayer != nil) {

        if([self.audioPlayer isPlaying] == YES){

            [self.audioPlayer stop];

        }

        self.audioPlayer = nil;

    }

Wow,  that is quite a lot of work/code just to play an Audio file.

So far, the best I got are the following 2, which is quite similar:
1st one is from iOS Recipes: Tips and Tricks for Awesome iPhone and iPad Apps. The code is as below:

    NSURL *url = [NSURL fileURLWithPath:

                  [NSString stringWithFormat:@"%@/correct01.caf", 

  [[NSBundle mainBundle] resourcePath]]];

NSError *error;

audioPlayer = [[AVAudioPlayer alloc] 

                   initWithContentsOfURL:url error:&error];

audioPlayer.numberOfLoops = -1;

[audioPlayer play];

2nd one is from the the Core Animation Demo by Bob McCune I mentioned before:

    NSString *soundFilePath = [[NSBundle mainBundle]

                               pathForResource:@"correct01" ofType:@"caf"];

    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];

    AVAudioPlayer *audioPlayer =

    [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL

                                           error:nil];

    [fileURL release]; 

    audioPlayer.numberOfLoops = -1;

    [audioPlayer play];

Both are quite similar and much much shorter than the top example above plus many other examples I found on the net.

Let me know if you got better way!

Posted in: resource