Swift错误-在类型上使用实例成员

Question

下面的代码给出了错误：“在类型Snips上使用实例成员'getRandomBoy‘...”。

我想在“snipArray”中使用“getRandomBoy”方法。

这个是可能的吗？

Import Darwin

struct Snips {

let boyNames: [String]

let snipArray: [String] = [
    "Drink A beer",
    "Drink yet another Beer",
    "Drink 4 beers",
    "\(getRandomBoy()) has to drink)"
    ]

func getRandomSnip() -> String{
    let randomNumber: Int = Int(arc4random_uniform(UInt32(snipArray.count)))
    return snipArray[randomNumber]
}

func getRandomBoy() -> String{
    let randomNumber: Int = Int(arc4random_uniform(UInt32(boyNames.count)))
    return boyNames[randomNumber]
}
}

Answer 1

要访问内部方法，需要在function和variables声明之前写入static关键字。

以下是修改后的代码：

struct Snips {

    static let boyNames = ["Hi", "Hello"]

    static let snipArray: [String] = [
        "Drink A beer",
        "Drink yet another Beer",
        "Drink 4 beers",
        "\(Snips.getRandomBoy()) has to drink)"
    ]

    static func getRandomSnip() -> String{
        let randomNumber: Int = Int(arc4random_uniform(UInt32(snipArray.count)))
        return snipArray[randomNumber]
    }

    static func getRandomBoy() -> String{
        let randomNumber: Int = Int(arc4random_uniform(UInt32(boyNames.count)))
        return boyNames[randomNumber]
    }
}

希望这能有所帮助！