@IBAction func recordAudio(sender: AnyObject)
{
    if sender.state == UIGestureRecognizerState.Ended
    {
        session.setCategory(AVAudioSessionCategoryPlayback, error: nil)
        recorder.stop()
        recordButton.backgroundColor = UIColor.whiteColor()
        save()
    }
    else if sender.state == UIGestureRecognizerState.Began
    {
        session.setCategory(AVAudioSessionCategoryRecord, error: nil)
        recorder.record()
        recordButton.backgroundColor = UIColor.greenColor()
    }
    else if sender.state == UIGestureRecognizerState.Cancelled
    {
        recorder.stop()
        recordButton.backgroundColor = UIColor.redColor()
    }
}

@IBAction func recordAudio(sender: UILongPressGestureRecognizer)
{
    switch (sender.state)
    {
        case .Ended:
            session.setCategory(AVAudioSessionCategoryPlayback, error: nil)
            recorder.stop()
            recordButton.backgroundColor = UIColor.whiteColor()
            save()
        case .Began:
            session.setCategory(AVAudioSessionCategoryRecord, error: nil)
            recorder.record()
            recordButton.backgroundColor = UIColor.greenColor()
        case .Cancelled, .Ended:
            recorder.stop()
            recordButton.backgroundColor = UIColor.redColor()
        default:
            break
    }
}

@IBAction func recordAudio(sender: UILongPressGestureRecognizer)
{
    switch (sender.state)
    {
        case .Ended:
            session.setCategory(AVAudioSessionCategoryPlayback, error: nil)
            recorder.stop()
            recordButton.backgroundColor = UIColor.whiteColor()
            post()
        case .Began:
            session.setCategory(AVAudioSessionCategoryRecord, error: nil)
            recorder.record()
            recordButton.backgroundColor = UIColor.greenColor()
        case .Cancelled:
            recorder.stop()
            recordButton.backgroundColor = UIColor.redColor()
        case .Changed:
            let touchLocation = recordGesture.locationInView(recordButton)
            if (!CGRectContainsPoint(recordButton.bounds, touchLocation))
            {
                // touch is outside of button
                recorder.stop()
                recordButton.backgroundColor = UIColor.whiteColor()
                break
            }
        default:
            break
    }
}

@IBAction func recordAudio(sender: AnyObject)
{
    switch (sender.state) {
        case .Ended:
            session.setCategory(AVAudioSessionCategoryPlayback, error: nil)
            recorder.stop()
            recordButton.backgroundColor = .whiteColor()
            save()
        case .Began:
            session.setCategory(AVAudioSessionCategoryRecord, error: nil)
            recorder.record()
            recordButton.backgroundColor = .greenColor()
        case .Cancelled:
            recorder.stop()
            recordButton.backgroundColor = .redColor()
        case .Changed:
            // detect if the touch has gone outside of the button and stop the recording
        default:
            // do nothing
    }
}

let touchLocation = recognizer.location(in: recordButton)

if !recordButton.bounds.contains(touchLocation) {
// touch is outside of button
}