Download and play mp3 file from URL - ios

Question

I have downloaded a mp3 file but i'm not able to play it. The file is downloaded, i've checked but when i try to play the local file, nothing happens. If i directly play it without downloading it, it plays.
- (IBAction)downloadTrack:(id)sender {
NSData *soundData = [NSData dataWithContentsOfURL:self.song.ticket.url];
NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [documents stringByAppendingPathComponent:self.song.slug];
[soundData writeToFile:filePath atomically:YES];
NSURL *urlFile = [NSURL URLWithString:filePath];
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:urlFile error:nil];
player.numberOfLoops = -1; //Infinite
[player play];
}

Answer 1

- (void)viewDidLoad
{
[super viewDidLoad];
// Download
NSString *urlString = #"https://oi.net/songs/5-dope-ski-128k.mp3";
NSURL *url = [[NSURL alloc] initWithString:urlString];
NSData *soundData = [NSData dataWithContentsOfURL:url];
NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [documents stringByAppendingPathComponent:#"5-dope-ski-128k.mp3"];
[soundData writeToFile:filePath atomically:YES];
// Play
NSString *filename = #"Ola.mp3";
NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *documentsDirectory = [pathArray objectAtIndex:0];
NSString *yourSoundPath = [documentsDirectory stringByAppendingPathComponent:filename];
NSURL *soundUrl;
if ([[NSFileManager defaultManager] fileExistsAtPath:yourSoundPath])
{
soundUrl = [NSURL fileURLWithPath:yourSoundPath isDirectory:NO];
}
// Create audio player object and initialize with URL to sound
_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
[_audioPlayer play];
}