Question

新手警报。

我想在多页照片上使用相同的代码（以帮助我的儿子识别人）。因此，我没有重新插入每个人的名字，而是创建了appearingInPhoto（字典），所以我只能使用.a .b .c，而不必重命名每行代码。

有没有办法进一步简化代码。所以我可以只有一个代码检查，如果Button按下（检查sender.currentTitle是否等于任何字典值，如果是，运行此代码：

print("pressed \(appearingInPhoto.a)")
        label.text = appearingInPhoto.a
        soundName = appearingInPhoto.a

这是现在的全部功能。

  var appearingInPhoto = (a:"omar", b:"john", c:"thomas")

  @IBAction func buttonPressed(_ sender: UIButton) {
    var soundName: String? = nil
    if sender.currentTitle == appearingInPhoto.a {
        print("pressed \(appearingInPhoto.a)")
        label.text = appearingInPhoto.a
        soundName = appearingInPhoto.a
    }else if sender.currentTitle == appearingInPhoto.b {
        print("pressed \(appearingInPhoto.b)")
        label.text = appearingInPhoto.b
        soundName = appearingInPhoto.b
    }else if sender.currentTitle == appearingInPhoto.c {
        print("pressed \(appearingInPhoto.c)")
        label.text = appearingInPhoto.c
        soundName = appearingInPhoto.c
    }
    if let soundName = soundName {
        playSoundFile(soundName)
    }
  }

提前谢谢你。

Answer 1

您可以使用Array或Set以及contains(_:)：

let photoSubjects: Set = ["omar", "john", "thomas")

@IBAction func buttonPressed(_ sender: UIButton) {
    let title = sender.currentTitle

    guard photoSubjects.contains(title) else { return }

    print("pressed \(title)")
    label.text = title
    let soundName = title
    playSoundFile(soundName)
}

在swift中简化函数

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