iOS Playing Random Sounds

[Ryan Burgess]

Hi, I am trying to make an app where pressing a button will play a random sound. I have the code written and am getting no errors, however the sounds don't play on my iPhone that I'm testing it with.

I've connected the button to the IBAction I want it to perform, but when it's tapped I get nothing.

Here is my Main.m code

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (AVAudioPlayer *)setupAudioPlayerWithFile:(NSString *)file type:(NSString *)type
{
    NSString *path = [[NSBundle mainBundle] pathForResource:file ofType:type];
    NSURL *url = [NSURL fileURLWithPath:path];
    NSError *error;
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
    if (!audioPlayer) {
        NSLog(@"%@",[error description]);
    }
    return audioPlayer;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
 
	}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(IBAction)namesPressed{
    int randomNumber = arc4random() % 68 + 1;
    
    NSURL *soundURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:[NSString stringWithFormat:@"Sound %02d", randomNumber] ofType:@"wav"]];
    
    AVAudioPlayer * soundPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundURL error:nil];
    
    [soundPlayer setVolume:0.3];
    [soundPlayer prepareToPlay];
    [soundPlayer play];
}

@end

My audio files are named like this "Sound 01.wav" if anyone can see my error, please point it out! Thanks!

 

[Duncan C]

You show a method setupAudioPlayerWithFile and then never use it. Delete it if it isn't used.

Then, your IBAction method has a big complex line that does everything at once. You can't debug that.

Break that line into 3 or 4 lines:

Build the string.
Get the path from the bundle
Use the path to create a URL
Initialize the audio player using the URL.

Then step through that code in the debugger. Examine the results of each step. At some point you'll see a result you don't expect, and that will be the cause of your problem.

My bet is that you forgot to add the sound files to your project, or their target membership checkbox is not checked, so they are not getting copied into your app's bundle.

NSBundle methods return nil if they can't find the file you are asking for. I bet you're getting nil back from the call to pathForResourcefType: .

Hi, I am trying to make an app where pressing a button will play a random sound. I have the code written and am getting no errors, however the sounds don't play on my iPhone that I'm testing it with.

I've connected the button to the IBAction I want it to perform, but when it's tapped I get nothing.

Here is my Main.m code

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (AVAudioPlayer *)setupAudioPlayerWithFile:(NSString *)file type:(NSString *)type
{
    NSString *path = [[NSBundle mainBundle] pathForResource:file ofType:type];
    NSURL *url = [NSURL fileURLWithPath:path];
    NSError *error;
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
    if (!audioPlayer) {
        NSLog(@"%@",[error description]);
    }
    return audioPlayer;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
 
	}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(IBAction)namesPressed{
    int randomNumber = arc4random() % 68 + 1;
    
    NSURL *soundURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:[NSString stringWithFormat:@"Sound %02d", randomNumber] ofType:@"wav"]];
    
    AVAudioPlayer * soundPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundURL error:nil];
    
    [soundPlayer setVolume:0.3];
    [soundPlayer prepareToPlay];
    [soundPlayer play];
}

@end

My audio files are named like this "Sound 01.wav" if anyone can see my error, please point it out! Thanks!