IOS issues with AVFoundation music player, working 50% of the time - ios

Question

i have some issues with the AVFoundation music player.
1) It does not start instantly, i guess buffering is slow on the simulator?
2) It only starts with sound 50% of the time, the other 50% it does not start, very unreliable
Here is my class
Music_Player.h
#interface Music_Player : NSObject <AVAudioPlayerDelegate>
#property (nonatomic, retain) AVAudioPlayer *audioPlayer;
#property (nonatomic, retain) NSString *trackPlaying;
#property (nonatomic) BOOL isPlaying;
#property (nonatomic, retain) NSTimer *timer;
#property (nonatomic, retain) UISlider *slider;
-(void)initTrack: (NSString *) track;
-(void)startPlayer;
-(void)pausePlayer;
-(void)stopPlayer;
-(void)sliderUp;
-(void)sliderDown;
#end
Music_Player.m
#import "Music Player.h"
#implementation Music_Player
#synthesize audioPlayer;
#synthesize trackPlaying;
#synthesize timer;
#synthesize isPlaying;
#synthesize slider;
-(void)initTrack:(NSString *)track
{
/* Init slider */
self.isPlaying = FALSE;
self.trackPlaying = track;
NSBundle *mainBundle = [NSBundle mainBundle];
NSString *filePath = [mainBundle pathForResource:self.trackPlaying ofType:#"mp3"];
NSData *fileData = [NSData dataWithContentsOfFile:filePath];
NSError *error = nil;
self.audioPlayer = [[AVAudioPlayer alloc] initWithData:fileData error:&error];
[self.audioPlayer prepareToPlay];
/* Set slider max value */
self.slider.minimumValue = 0;
self.slider.maximumValue = self.audioPlayer.duration - 5;
}
-(void)startPlayer
{
if (self.isPlaying == TRUE)
{
NSLog(#"Pause clicked");
[self.audioPlayer pause];
self.isPlaying = FALSE;
} else {
NSLog(#"Play clicked");
[self.audioPlayer play];
self.isPlaying = TRUE;
if (![self.timer isValid]) {
self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(updateTime) userInfo:nil repeats:YES];
}
}
}
- (void)updateTime {
if (self.isPlaying == TRUE) {
NSTimeInterval currentTime = self.audioPlayer.currentTime;
NSLog(#"%f", currentTime);
// update UI with currentTime;
slider.value = round(currentTime);
}
}
-(void)pausePlayer
{
if (self.isPlaying == TRUE)
{
[self.audioPlayer pause];
self.isPlaying = FALSE;
}
}
-(void)stopPlayer
{
if (self.isPlaying == TRUE)
{
NSLog(#"Stop clicked");
[self.audioPlayer stop];
self.audioPlayer.currentTime = 0;
self.slider.value = round(self.audioPlayer.currentTime);
self.isPlaying = FALSE;
}
}
-(void)sliderUp
{
if (self.isPlaying == FALSE)
{
self.audioPlayer.currentTime = round(slider.value);
[self.audioPlayer play];
self.isPlaying = TRUE;
}
}
-(void)sliderDown
{
if (self.isPlaying == TRUE)
{
self.isPlaying = FALSE;
[self.audioPlayer stop];
}
}
/* AUDIO PLAYER DELEGATES */
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
NSLog(#"Did finish with, %c", flag);
}
- (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error
{
NSLog(#"Error %#",error);
}
#end
I just set up the slider property and init it with a track from my viewController
/* Init Music */
self.music_player = [[Music_Player alloc] init];
self.music_player.slider = self.slider;
[self.music_player initTrack:#"track1"];
And then i just pass on the Btn clicks and slider value changes to the music_player class, what could be the issue? I will be testing it on a iPhone tomorow, so could it just be a simulator issue?

Answer 1

Two things:
In initWithData:error:, is there an error set after being called?
Why not use [AVAudioPlayer initWithContentsOfURL:error:]? Eg:
- (void)initTrack:(NSString *)track
{
self.isPlaying = NO;
self.trackPlaying = track;
NSBundle *mainBundle = ;
NSString *filePath = [[NSBundle mainBundle] pathForResource:self.trackPlaying ofType:#"mp3"];
NSURL *fileURL = [NSURL fileURLWithPath:filePath];
NSError *error = nil;
self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:&error];
}