每次更改参数时都用新参数重新初始化类的实例

Question

我如何重新初始化/实例化一个模型，该模型每次更改其值时都会采用一个参数？ 该模型可以工作，但使用参数的旧值，但每次此参数更改时都需要重新初始化。

我找到了 didSet 和 willSet，但我不知道如何正确使用它

var test = countDownPicker.countDownDuration {
        willSet {
            self.model.workTimeInterval = PomodoroModel.TimeInterval(newValue)
        }
    }
    
    self.model = PomodoroModel(workTimeInterval: PomodoroModel.TimeInterval(test))

番茄模型字段

public class PomodoroModel {

public typealias TimeInterval = UInt

weak var delegate: PomodoroModelDelegate?

var workTimeInterval: TimeInterval
let breakTimeInterval: TimeInterval
let restTimeInterval: TimeInterval
let numberOfCycles: TimeInterval

init(workTimeInterval: TimeInterval = 1500,
     breakTimeInterval: TimeInterval = 300,
     restTimeInterval: TimeInterval = 700,
     numberOfCycles: TimeInterval = 4) {
    self.workTimeInterval = workTimeInterval
    self.breakTimeInterval = breakTimeInterval
    self.restTimeInterval = restTimeInterval
    self.numberOfCycles = numberOfCycles
    self.state = StateNeutral()
    self.state.model = self
}