Referencing func that is within another func (swift)

Question

I've got a UIPanGestureRecognizer setup that has a couple of functions inside of it. I want to be able to reference these functions within a button.

The UIPanGestureRecognizer

  @IBAction func panCard(_ sender: UIPanGestureRecognizer) {

    let card = sender.view!
    let point = sender.translation(in: view)

    card.center = CGPoint(x: view.center.x + point.x, y: view.center.y + point.y)

    func swipeLeft() {
        //move off to the left
        UIView.animate(withDuration: 0.3, animations: {
            card.center = CGPoint(x: card.center.x - 200, y: card.center.y + 75)
            card.alpha = 0
        })
    }

    func swipeRight() {
        //move off to the right
        UIView.animate(withDuration: 0.3, animations: {
            card.center = CGPoint(x: card.center.x + 200, y: card.center.y + 75)
            card.alpha = 0
        })
    }

    if sender.state == UIGestureRecognizerState.ended {

        if card.center.x < 75 {
            swipeLeft()
            return
        } else if card.center.x > (view.frame.width - 75) {
            swipeRight()
            return
        }

        resetCard()

    }

}

And the Button

@IBAction func LikeButton(_ sender: UIButton) {

}

How can I reference either of the functions swipeLeft and swipeRight inside the button?

Answer 1

The functions are not accessible out of their scope, which is inside your panCard function. Your only option is to move them outside of the scope:

@IBAction func panCard(_ sender: UIPanGestureRecognizer) {

    let card = sender.view!
    let point = sender.translation(in: view)

    card.center = CGPoint(x: view.center.x + point.x, y: view.center.y + point.y)

    if sender.state == UIGestureRecognizerState.ended {

        if card.center.x < 75 {
            swipeLeft()
            return
        } else if card.center.x > (view.frame.width - 75) {
            swipeRight()
            return
        }

    resetCard()

    }
}

func swipeRight() {
    //move off to the right
    UIView.animate(withDuration: 0.3, animations: {
        card.center = CGPoint(x: card.center.x + 200, y: card.center.y + 75)
        card.alpha = 0
    })
}

func swipeLeft() {
    //move off to the left
    UIView.animate(withDuration: 0.3, animations: {
        card.center = CGPoint(x: card.center.x - 200, y: card.center.y + 75)
        card.alpha = 0
    })
}

@IBAction func LikeButton(_ sender: UIButton) {
// swipeLeft()
// swipeRight()
}