dct-snippet3

dct-snippet3.swift

// Declare model class for the option

public class BoolOption: Option {
    public typealias Handler = (Bool) -> Void
    
    public var name: String
    public internal(set) var value: Bool {
        didSet {
            self.onChangeHandler?(self.value)
        }
    }
    public var onChangeHandler: Handler?
    
    public init(name: String, initialValue: Bool, onChangeHandler: @escaping Handler) {
        self.name = name
        self.value = initialValue
        self.onChangeHandler = onChangeHandler
    }
}

// Declare UITableViewCell subclass in a different file for its representation
import UIKit.UITableViewCell

class BoolOptionCell: UITableViewCell, OptionCell {
    
    @IBOutlet weak var optionName: UILabel!
    @IBOutlet weak var `switch`: UISwitch!
    
    internal var option: BoolOption?
    
    @IBAction func optionDidChange(_ sender: UISwitch) {
        self.option?.value = sender.isOn
    }
    
    public func configure(for option: Option) {
        guard let boolOption = option as? BoolOption else {
            fatalError("Wrong option was used for configuring the cell")
        }
        
        self.optionName.text = option.name
        self.switch.isOn = boolOption.value
        self.option = boolOption
    }
}