CarouselView - Horizontal CollectionView

CarouselCell.swift

//
//  CarouselCell.swift
//  CardCarousel2
//
//  Created by Reona Kubo on 2018/06/11.
//  Copyright © 2018年 Reona Kubo. All rights reserved.
//

import UIKit

class CarouselCell: UICollectionViewCell {
    
}

CarouselView.swift

//
//  CarouselView.swift
//  CardCarousel2
//
//  Created by Reona Kubo on 2018/06/11.
//  Copyright © 2018年 Reona Kubo. All rights reserved.
//

import UIKit

class CarouselView: UICollectionView {

    let cellIdentifier = "carousel"
    let pageCount = 5
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout) {
        super.init(frame: frame, collectionViewLayout: layout)
        self.delegate = self
        self.dataSource = self
        self.register(CarouselCell.self, forCellWithReuseIdentifier: cellIdentifier)
    }
    
    convenience init(frame: CGRect) {
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = CGSize(width: 200, height: frame.height / 2)
        layout.scrollDirection = .horizontal
        
        self.init(frame: frame, collectionViewLayout: layout)
        
        // 水平方向のスクロールバーを非表示にする
        self.showsHorizontalScrollIndicator = false
        self.backgroundColor = UIColor.white
    }
    
}

extension CarouselView: UICollectionViewDelegate {
    
}

extension CarouselView: UICollectionViewDataSource {
    
    // セクションごとのセル数
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.pageCount
    }
    
    // セルの設定
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = dequeueReusableCell(withReuseIdentifier: cellIdentifier, for: indexPath)
        cell.contentView.backgroundColor = UIColor.green
        return cell
    }
    
}

ViewController.swift

//
//  ViewController.swift
//  CardCarousel2
//
//  Created by Reona Kubo on 2018/06/11.
//  Copyright © 2018年 Reona Kubo. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    var carouselView:CarouselView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let width = self.view.frame.width
        let height = self.view.frame.height
        
        carouselView = CarouselView(frame: CGRect(x:0, y:0, width:width, height:height))
        carouselView.center = CGPoint(x:width / 2,y: height / 2)
        self.view.addSubview(carouselView)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}