ios - 如何在 Swift 中检查子类中使用了哪个 ViewController

Question

我正在制作一款有 2 种游戏模式(红色模式和蓝色模式)的射击游戏。这两种模式是 ViewController，有 subView(UIView 子类)和游戏结果 View ，显示您获得了多少分数。
但根据游戏模式的不同，会有一些差异。我尝试制作“ResultView Class”并想让这两种游戏模式拥有该类。但我不知道如何根据游戏模式单独处理。

理想:

1. 创建“ResultView 类”
2. 在“showResultView”函数中制作每种游戏模式(RedView 和 BlueView)的 ResultView
3. 根据游戏模式进行一些单独的处理

(现在我在每个游戏模式下都制作“resultView”，即使内容几乎相同”)

如何解决？

//ViewController for RedMode
class RedGameViewController: UIViewController {

var gameStatus: status!
var redView: RedView!

    override init(frame: CGRect) {
    super.init(frame: frame)

    redView = RedView.init(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 568))
    self.view.addSubview(redView)
    redView.redGameViewController = self
    //.....
    }

enum status: String {
    case isPlaying = "isPlaying"
    case isPausing = "isPausing"
    case isGameOver = "isGameOver"
    }

class RedView: UIView {

    weak var redGameViewController: RedGameViewController!

    override init(frame: CGRect) {
     super.init(frame: frame)
    }
    //....
    @objc func showResultView(){ 
        var resultView = UIImageView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 568))
        resultView.isUserInteractionEnabled = true
        resultView.image = UIImage(named:"resultView_BG")!
        self.addSubview(resultView)

        resultScoreLabel.text = String(score)
        resultBackToTopBtn.isHidden = false
        if redViewController.gameStatus == .isGameOver {
            print("isGameOver")
        }else{
            print("Clear")
        }
    }
}
//ViewController for BlueMode
class BlueGameViewController: UIViewController {

var gameStatus: status!
var blueView: BlueView!

    override init(frame: CGRect) {
    super.init(frame: frame)

    blueView = BlueView.init(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 568))
    self.view.addSubview(blueView)
    blueView.blueGameViewController = self
    //.....
    }
enum status: String {
    case isPlaying = "isPlaying"
    case isPausing = "isPausing"
    case isGameOver = "isGameOver"
    }

class BlueView: UIView {

    weak var blueGameViewController: BlueGameViewController!
    override init(frame: CGRect) {

    super.init(frame: frame)
    }
    //....
    @objc func showResultView(){ 
        var resultView = UIImageView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: 568))
        resultView.isUserInteractionEnabled = true
        resultView.image = UIImage(named:"resultView_BG")!
        self.addSubview(resultView)

        //Different from showResultView in RedView
        resultScoreLabel.text = String(score*10)
        resultBackToTopBtn.isHidden = true
        if blueViewController.gameStatus == .pausing {
            print("isPausing")
        }else{
            print("Clear")
        }
    }
}

Answer 1

实现这一点的一个好方法是使用协议(protocol)。

选项 1:

假设您有一个名为 ColoredView 的协议(protocol)，其中包含您的逻辑方法

protocol ColoredView {
     func showResult(/* add parameters if you need them */)
}

在名为 ResultViewController 的 UIViewController 中，您将拥有一个能够调用逻辑函数的 ColoredView，例如

class ResultViewController {
     var coloredView: UIView!

     func showResultView() {
          guard let coloredView = self.coloredView as? ColoredView else {
              // This is not a coloredView
              return
          }
          coloredView.showResult()
     }
}

由此，只需创建两个实现协议(protocol)的 View

class RedView: UIView, ColoredView {
    func showResult() {
        // Insert Red logic here
    }
}

class BlueView: UIView, ColoredView {
    func showResult() {
        // Insert Blue logic here
    }
}

然后只需创建 ResultViewController，并使用 RedView 或 BlueView 作为其 colorView。

选项 2:

您可以使用类似的协议(protocol)来分隔变量

protocol ColoredView {
     func getScoreText(from score: Int) -> String
     func getPrintText(for status: Status) -> String
     var isHidden: Bool
}

就像选项 1 一样

func showResult() {
    if let coloredView = self.coloredView as? ColoredView {
        resultScoreLabel.text = coloredView.getScoreText(from: score)
        resultBackToTopBtn.isHidden = coloredView.isHidden
        print(coloredView.getPrintText(for: gameStatus)
    }
}

与

class RedView: UIView, ColoredView {
     func getScoreText(from score: Int) -> String {
         // Insert Red logic here
    }

    var isHidden = false

    func getPrintText(for status: Status) -> String {
         // Insert Red logic here
    }
}

class BlueView: UIView, ColoredView {
     func getScoreText(from score: Int) -> String {
         // Insert Blue logic here
    }

    var isHidden = true

    func getPrintText(for status: Status) -> String {
         // Insert Blue logic here
    }
}

希望有帮助;)