[iOS] Add Tap Gesture Recognizer

add_tap_gesture.swift

// confirm to the tap gesture recognizer delegate

func addTapGestureRecognizerForPausingWorkout() {
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "workoutVideoTapped:")
    tapGestureRecognizer.numberOfTapsRequired = 1
    tapGestureRecognizer.delegate = self
    self.view.addGestureRecognizer(tapGestureRecognizer)
}

func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool { return true }