swift - 计算结构中的项目数？

Question

我有一个结构并在许多类(class)中使用它。我想有一种方法来计算每个类中初始化了多少结构(比如 array.count)，但我在上面找不到任何东西。

struct measuredBMInfo {
  var level: Int
  var message: String

init(level: Int, message: String) {
    self.level = level
    self.message = message
  }
}

我使用如下结构:

// setup pain
let painInfo0 = measuredPainInfo(level: 0, message: "No Pain")
let painInfo1 = measuredPainInfo(level: 1, message: "Mild pain can be ignored")
let painInfo2 = measuredPainInfo(level: 2, message: "Moderate pain that interferes with tasks")
let painInfo3 = measuredPainInfo(level: 3, message: "Moderate pain interferes with concentration")
let painInfo4 = measuredPainInfo(level: 4, message: "Severe pain interferes with basic tasks")
let painInfo5 = measuredPainInfo(level: 5, message: "Worst possible pain bedrest required")

在这种情况下，我想要 measuredPainInfo 的计数。

Answer 1

您可以定义一个数组来存储结构:

var structArray:[measuredBMInfo] = []

override func viewDidLoad() {
    super.viewDidLoad()

    setPainInfo(0, message: "dfsa")
    setPainInfo(1, message: "dsger")
    setPainInfo(2, message: "kh sdfujo")
    setPainInfo(3, message: "sdfasfd")

    print(getStructCount())
}

func setPainInfo(level:Int, message: String){
    let painInfo = measuredBMInfo(level: level, message: message)
    structArray.append(painInfo)
}

使用以下方法获取结构计数:

func getStructCount()->Int{
    return structArray.count
}