On shake... iOS

Question

So I have an IBAction yesNo that I want to be ran on a shake event. Not all too sure why this is not working. Have followed all the documentation.

-(BOOL)canBecomeFirstResponder
{
    return YES;
}

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
{
    if (event.subtype == UIEventSubtypeMotionShake)
    {
        [self yesNo];
    }
}

And then the IBAction itself:

- (IBAction)yesNo 
{
    int rNumber = rand() % 26;  
    NSUserDefaults *def=[NSUserDefaults standardUserDefaults];
    if ([[def objectForKey:@"activeVersion"] isEqualToString:@"0"])
    {
        switch (rNumber) {
            case 0:
                result.text  = @"Never";
                break;
            case 1:
                result.text = @"If you're lucky...";
                break;
            case 3:
                result.text = @"Think twice";
                break;
            ...
            default:
                break;
        }
    }
    else if ([[def objectForKey:@"activeVersion"] isEqualToString:@"1"])
    {
        switch (rNumber) {
            case 0:
                result.text  = @"Never1";
                break;
            case 1:
                result.text = @"If you're lucky...1";
                break;
            ...
            case 25:
                result.text = @"Very doubtful2";
                break;

            default:
                break;
        }
    }
    else if ([[def objectForKey:@"activeVersion"] isEqualToString:@"3"])
    {
        switch (rNumber) {
        case 0:
            result.text  = @"Never3";
            break;
        ...
        case 25:
            result.text = @"Very doubtful3";
            break;

        default:
            break;
    }
}   
}

Basically what I have is a fortune ball type thing and when the iPhone is shaken I need that IBAction run.

Answer 1

Have you made that view the first responder? I.e. [yourView becomeFirstResponder]; (probably from some viewDidAppear: method). You might want to check if it actually is the first responder when you shake your device.