swift - 使用 Swift 重构/组合多个几乎相同的类的推荐方法？

Question

在 Swift 中，我如何将以下内容合并到一个类中？

class FirstClass: Codable, ObservableObject {
  @Published var int: Int
  @Published var bool: Bool
  @Published var firstObject: FirstType

// plus inits and custom decoding/encoding stuff

}

class SecondClass: Codable, ObservableObject {
  @Published var int: Int
  @Published var bool: Bool
  @Published var secondObject: SecondType

// plus inits and custom decoding/encoding stuff

}

class ThirdClass: Codable, ObservableObject {
  @Published var int: Int
  @Published var bool: Bool
  @Published var thirdObject: ThirdType

// plus inits and custom decoding/encoding stuff

}

(with FirstType, SecondType and ThirdType also being class models that conform to Codable and ObservableObject)

为了最终得到这样的结果:

class CommonClass: Codable, ObservableObject {
  @Published var int: Int
  @Published var bool: Bool
  @Published var object: CommonType // which could accept FirstType, SecondType or ThirdType

// plus inits and custom decoding/encoding stuff

}

我应该怎样做呢？有没有更好的方法仍然可以按照我的预期工作？

我基本上试图实现两件事:1-避免重复代码(就像在我的现实生活场景中，有更多的共同变量而不仅仅是 int 和 bool)和 2-使下游代码更简单希望也能最大限度地减少对单独 View 的需求。

Answer 1

尚不清楚其他代码，但前提是我会使用泛型，例如

class CommonClass<T>: Codable, ObservableObject {
//class CommonClass<T: CommonType>: Codable, ObservableObject { // << as variant
  @Published var int: Int
  @Published var bool: Bool
  @Published var object: T

// plus inits and custom decoding/encoding stuff

}