swift3字符串到Selector，如何接收返回值

Question

var tweakEntries = [(title : String, array : [Array<String>])]()

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.tableFooterView = UIView()
    navigationItem.title = "设置"
    //tableView.separatorStyle = .none

    let timeSettingArr = [
        ["工作时间间隔","workTime","setWorkTime"],
        ["休息时间间隔","relaxTime","setRelaxTime"],
    ]
    let _ = [
        ["通知标题","",""],
        ["通知语","",""]
    ]
    let _ = [
        ["显示背景图片","displayStatus","setDisplayStatus"]
    ]
    tweakEntries = [
        ("时间设置",timeSettingArr),
        //("通知设置",localNoti),
        //("其他设置",otherSettingArr)
    ]
}



override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let section = indexPath.section
    let row = indexPath.row
    let identifier  = "SettingCell"
    var cell = tableView.dequeueReusableCell(withIdentifier: identifier)
    if (cell == nil) {
        cell = SettingCell.init(style: .subtitle, reuseIdentifier: identifier)
    }
    cell?.textLabel?.text = tweakEntries[section].array[row][0]
    let methodName = tweakEntries[section].array[row][1];
    print("\(methodName)")
    let method : Selector = Selector(methodName)
    let detailText = perform(method)
    //let temp : CGFloat = detailText as! CGFloat
    //cell?.detailTextLabel?.text = "\(temp)"


    return cell!
}

func workTime() -> CGFloat {
    return 11.0
}

如何获得返回值

执行：

public func perform(_ aSelector: Selector!) -> Unmanaged<AnyObject>!

使用元组使代码更容易扩展

tableView delegateMethod和dataSouseMethod根据元组returnValue

必须使用表演吗？是否有其他功能

代码：https://github.com/CoderYLZhang/Working