Display Image and play corresponding audio - objective-c

Question

I like to display and image and play corresponding audio file. But it is playing audio files first before displaying. I couldn't figure it what is wrong.
-(IBAction)playButton :(id)sender{
UIImage *imageA = [UIImage imageNamed:#"Image1.png"];
UIImage *imageB = [UIImage imageNamed:#"Image2.png"];
int randomAlphaNum = arc4random() % 2;
NSLog(#"%i", randomAlphaNum);
switch (randomAlphaNum) {
case 0:
imageView.image = imageA;
for (int i = 1; i <=5; i++) {
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:#"%#/audioA.wav", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.volume = 0.5;
if (audioPlayer == nil)
NSLog(#"An audio error occured: \"%#\"", audioPlayer);
else
{
[audioPlayer play];
}
sleep(2);
}
return;
break;
}
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}

Answer 1

First of all I wouldn't recommend using sleep as it's going to chew up your main thread and make your UI unresponsive. I'd actually be curious if removing it alleviates your issue. There's a chance the app is flying through your code, playing the audio and is hitting the sleep command before the app can display the image on the screen. What happens if you remove sleep and only iterate through the for loop once?