Objective-c NSInvalidArgumentException Xcode7

Question

Hey Guys I'm just gonna cut to the chase I was trying to play audio

- (IBAction)click1:(id)sender{
    Drill.image = [UIImage imageNamed:@"Drillx2"];
    AudioServicesPlaySystemSound(PlaySoundID);
}

- (IBAction)click2:(id)sender
{    
    Drill.image = [UIImage imageNamed:@"Drillx1"];
}

- (void)viewDidLoad {
    NSURL *SoundURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Drill" ofType:@"m4a"]];
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)SoundURL, &PlaySoundID);

    [super viewDidLoad];
}

And I get this error

'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'

Thanks, Derek

Note : Yes the resource for the sound is named Drill.

Answer 1

In the code

NSURL *SoundURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Drill" ofType:@"m4a"]];

It didn't find the given file in the bundle file path.
make sure you have added file in the proper target and also build again after adding the resource to make sure it exist in the bundle

Reference : As written in the parameter Passing nil for this parameter produces an exception.