今天是要做空畫面的處理，當所有的卡片都抽完了時候，希望能夠給使用者一個回覆，所以建立一個空畫面來處理

EmptyView Xib

EmptyView

import UIKit

class EmptyView: UIView {

    @IBOutlet weak var backgroundImageView: UIImageView!

    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var tapButton: UILabel!
    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }

    static func initXib() -> EmptyView {
        let view = UINib(nibName: String(describing: EmptyView.self), bundle: nil).instantiate(withOwner: nil, options: nil).first as! EmptyView
        return view
    }

    func configure(reason: EmptyViewReason) {
        switch reason {
        case .noBond:
            self.tapButton.isHidden = true
        default:
            self.tapButton.isHidden = false
        }
        backgroundImageView.image = UIImage(named: reason.imageURL)
        tapButton.text = reason.buttonText
        titleLabel.text = reason.title
    }




}

enum EmptyViewReason {
    case noBond
    case firstNoBound
    case haveBond

    var title: String {
        switch self {
        case .noBond:
            return "真可惜！今天沒有緣分"
        case .firstNoBound:
            return "好可惜！可以再讓你說一個感人的情話試試看"
        case .haveBond:
            return "今日緣份到"
        }
    }

    var buttonText: String {
        switch self {
        case .noBond:
            return ""
        case .firstNoBound:
            return "說句試試看"
        case .haveBond:
            return ""
        }
    }

    var imageURL: String {
        switch self {
        case .noBond:
            return "notLucky"
        case .firstNoBound:
            return "again"
        case .haveBond:
            return "lucky"
        }
    }
}

選擇條件

之前的SlideViewController

fileprivate func removeCardAndAddNewCard(){

        index += 1
        let card = loadedCards.first!
        card.index = index
        if index == matchIndex {

            matchView.configure(imageURL: data[index-1])
            matchView.isHidden = false
            DispatchQueue.main.asyncAfter(deadline: .now() + 3, execute: { [weak self] in
                guard let self = self else { return }
                self.matchView.isHidden = true
            })
        }

        // 固定時間執行某個函數
        Timer.scheduledTimer(timeInterval: 1.01, target: self, selector: #selector(enableUndoButton), userInfo: card, repeats: false)
        loadedCards.remove(at: 0)
        if loadedCards.isEmpty {
            // 目前希望使用亂數來處理目前Bond機率
            let ran = Int.random(in: 0...9)
            if ran == 2 || ran == 5 || ran == 8 {
                emptyView.configure(reason: .haveBond)
            }
            emptyView.isHidden = false
            emptyView.configure(reason: .firstNoBound)
        }
    .
    .
    .
}