IOS) Swipe Guesture + PageControl (한 손가락 넘기기 + 두 손가락 넘기기 + PageControl 사용)

IOS) Swipe Guesture + PageControl (한 손가락 넘기기 + 두 손가락 넘기기 + PageControl 사용)

//
//  ViewController.swift
//  SwipeGuestureQ
//
//  Created by Leo_Jang on 27/08/2020.
//  Copyright © 2020 Leo_Jang. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    
    @IBOutlet weak var imgView: UIImageView!
    @IBOutlet weak var pageControl: UIPageControl!
    
    //왼쪽, 오른쪽만 사용
    var images = ["flower_01.png","flower_02.png","flower_03.png","flower_04.png","flower_05.png","flower_06.png"]
    
    let numberofTouches = 2
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        // PageControl 설정 값
        pageControl.numberOfPages = images.count
        pageControl.currentPage = 0
        pageControl.pageIndicatorTintColor = UIColor.green
        pageControl.currentPageIndicatorTintColor = UIColor.blue
        imgView.image = UIImage(named: images[0])
        
        // 한 손가락 Guesture
        // 오른쪽
        let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.responseToSwipeGesture(_ :)))
        swipeRight.direction = UISwipeGestureRecognizer.Direction.right
        self.view.addGestureRecognizer(swipeRight)
        
        // 왼쪽
        let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.responseToSwipeGesture(_:)))
        swipeLeft.direction = UISwipeGestureRecognizer.Direction.left
        self.view.addGestureRecognizer(swipeLeft)
        
        // 두 손가락 Guesture
        // 오른쪽
        let swipeRightMulti = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.responseToSwipeGestureMulti(_:)))
        swipeRightMulti.direction = UISwipeGestureRecognizer.Direction.right
        swipeRightMulti.numberOfTouchesRequired = numberofTouches
        self.view.addGestureRecognizer(swipeRightMulti)
        
        // 왼쪽
        let swipeLeftMulti = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.responseToSwipeGestureMulti(_:)))
           swipeLeftMulti.direction = UISwipeGestureRecognizer.Direction.left
           swipeLeftMulti.numberOfTouchesRequired = numberofTouches
           self.view.addGestureRecognizer(swipeLeftMulti)
    }
    // 한 손가락 Guesture
    @objc func responseToSwipeGesture(_ gesture: UISwipeGestureRecognizer){
        if let swipeGesture = gesture as? UISwipeGestureRecognizer{
            // 발생한 이벤트가 각 방향의 스와이프 이벤트라면
            // pageControl이 가르키는 현재 페이지에 해당하는 이미지를 imageView에 할당
        switch swipeGesture.direction{
            case UISwipeGestureRecognizer.Direction.right:
            pageControl.currentPage -= 1
            imgView.image = UIImage(named: images[pageControl.currentPage])
        case UISwipeGestureRecognizer.Direction.left:
            pageControl.currentPage += 1
            imgView.image = UIImage(named: images[pageControl.currentPage])
            default:
                break
            }
        }
    }
    // 두 손가락 Guesture
    @objc func responseToSwipeGestureMulti(_ gesture: UISwipeGestureRecognizer){
         if let swipeGesture = gesture as? UISwipeGestureRecognizer{
             // 발생한 이벤트가 각 방향의 스와이프 이벤트라면
             // pageControl이 가르키는 현재 페이지에 해당하는 이미지를 imageView에 할당
         switch swipeGesture.direction{
             case UISwipeGestureRecognizer.Direction.right:  // UISwipeGestureRecognizer.방향. 오른쪽
             pageControl.currentPage -= 1                   // pageControl에서 시작하여. 현재페이지 부터 + 1을or배열에 +1 을한다.
             imgView.image = UIImage(named: images[pageControl.currentPage])    // 배열안에 있는 이미지들 = UIImage(이름: var:imgages 배열안에 [pageControl에 있는.현재페이지] 즉 배열안에 있는 이미지들은 누르면 배열순서대로 이미지가 바뀐다.
         case UISwipeGestureRecognizer.Direction.left:
             pageControl.currentPage += 1
             imgView.image = UIImage(named: images[pageControl.currentPage])
             default:
                 break
            }
        }
    }
    // PageControl
    @IBAction func imgChange(_ sender: UIPageControl) {
        imgView.image = UIImage(named: images[pageControl.currentPage])
    }
} // ------------------------