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iOS Build a Simple iPhone App (iOS7) Animating and Intercepting Events Adding Sound

Justin Black
Justin Black
24,793 Points

[ Solution ] Xcode 6.1 no sound in simulator

I did this video yesterday, the sound didn't work and I just couldn't move on. After being frustrated for hours, playing with my system settings, and looking at the code I turned to my good friend google.

These videos are for iOS 7, but if you are new ( like me ), you are using xcode for iOS 8 and there are subtle nuances between the two versions.

The reason your code does NOT work, is because the AudioToolbox framework does NOT support mp3 files. It only supports CAF, AIF, or WAV

Instead, if we use the AVFoundation framework, it supports the use of AAC or MP3

My code here is not pretty, and it can be fixed to be prettier. Once you add the AVFoundation framework to your project. Open your THViewController and add the lines: ( i've shortened the code to JUST the necessary items )

#import "THViewcontroller.h"
#import "THCrystalBall.h"
@import AVFoundation;
@interface THViewController () <AVAudioPlayerDelegate>

@property (strong, nonatomic) AVAudioPlayer *backgroundMusicPlayer;

@implementation THViewController 

- (void)viewDidLoad {
    [super viewDidLoad];

NSString *backgroundMusicPath = [[NSBundle mainBundle] pathForResource:@"crystal_ball" ofType:@"mp3"];
    NSURL *backgroundMusicURL = [NSURL fileURLWithPath:backgroundMusicPath];
    self.backgroundMusicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:backgroundMusicURL error:nil];
    self.backgroundMusicPlayer.delegate = self;  // We need this so we can restart after interruptions
    self.backgroundMusicPlayer.numberOfLoops = 0;

-(void) makePrediction {
// ... your other code here
[self.backgroundMusicPlayer play];
// ... the rest of your code here..


I only added this, in an effort to help stop the confusion as to why the audio file in this video does not play. There are more options you can use for this method, this is just a simple basic example.

Brandon Johnson
Brandon Johnson
5,245 Points

Hey Justin, Thank you for posting a solution to this issue. I was just working through the videos myself and ran into this issue. Your posting of the solution saved me a lot of time, Thanks!

Thanks, Justin!)

1 Answer

Thank you!