【Xcode/Swift】スワイプでモーダルViewを表示させる

import UIKit

class SwipeViewController: UIViewController, UIGestureRecognizerDelegate {

    // MARK: - Outlets
    @IBOutlet private weak var swipeLabel: UILabel!

    // MARK: - View Lifecycle
    override func viewDidLoad() {
        super.viewDidLoad()
        configureSwipeView()
    }

    // MARK: - Private Methods
    private func configureSwipeView() {
        // 上スワイプ用のインスタンスを生成する
        let upSwipe = UISwipeGestureRecognizer(
            target: self, action: #selector(SwipeViewController.swipeLabel(_:))
        )
        upSwipe.direction = .up
        self.view.addGestureRecognizer(upSwipe)

        // 下スワイプ用のインスタンスを生成する
        let downSwipe = UISwipeGestureRecognizer(
            target: self, action: #selector(SwipeViewController.swipeLabel(_:))
        )
        downSwipe.direction = .down
        self.view.addGestureRecognizer(downSwipe)
        
        // 右スワイプ用のインスタンスを生成する
        let rightSwipe = UISwipeGestureRecognizer(
            target: self, action: #selector(SwipeViewController.swipeLabel(_:))
        )
        rightSwipe.direction = .right
        self.view.addGestureRecognizer(rightSwipe)

        // 左スワイプ用のインスタンスを生成する
        let leftSwipe = UISwipeGestureRecognizer(
            target: self, action: #selector(SwipeViewController.swipeLabel(_:))
        )
        leftSwipe.direction = .left
        self.view.addGestureRecognizer(leftSwipe)
    }

    // スワイプした方向をラベルに表示する。
    @objc private func swipeLabel(_ sender: UISwipeGestureRecognizer) {
        switch sender.direction {
        case UISwipeGestureRecognizer.Direction.up:
            let upViewController = UpViewController(nibName: "UpViewController", bundle: nil)
            // upViewController.modalPresentationStyle = .fullScreen // フルスクリーンモーダル遷移の場合
            print("上方向にスワイプしたよ")
            self.present(upViewController, animated: true, completion: nil)
        case UISwipeGestureRecognizer.Direction.down:
            let downViewController = DownViewController(nibName: "DownViewController", bundle: nil)
            // downViewController.modalPresentationStyle = .fullScreen // フルスクリーンモーダル遷移の場合
            print("下方向にスワイプしたよ")
            self.present(downViewController, animated: true, completion: nil)
        case UISwipeGestureRecognizer.Direction.left:
            let leftViewController = LeftViewController(nibName: "LeftViewController", bundle: nil)
            // leftViewController.modalPresentationStyle = .fullScreen // フルスクリーンモーダル遷移の場合
            print("左方向にスワイプしたよ")
            self.present(leftViewController, animated: true, completion: nil)
        case UISwipeGestureRecognizer.Direction.right:
            let rightViewController = RightViewController(nibName: "RightViewController", bundle: nil)
            // rightViewController.modalPresentationStyle = .fullScreen // フルスクリーンモーダル遷移の場合
            print("右方向にスワイプしたよ")
            self.present(rightViewController, animated: true, completion: nil)
        default:
            break
        }
    }

}

import UIKit

class <#方向#>ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    @IBAction func backAction(_ sender: Any) {
        dismiss(animated: true)
    }

}