Question

我正在猜测纸牌游戏，我得到了这个奇怪的错误，当我为符号和卡号创建一个随机数时，我无法修复。这是错误：

let cardSymbols = ["Spades", "Hearts", "Diamonds", "Clubs"]
let numbers = ["Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"]

func getRandomCard() {

    var correctSymbolNumber = arc4random_uniform(UInt32(cardSymbols.count - 1))
    var correctNumberNumber = arc4random_uniform(UInt32(numbers.count - 1))

    var correctSymbol = cardSymbols[correctSymbolNumber]
    var correctNumber = numbers[correctNumberNumber]

}

我该如何解决这个问题？我知道问题出在我的arc4random上......但我该如何解决呢。

Answer 1

你需要将arc4random_uniform的结果更改为swift Int，目前它是一个你不能用于swift字典或数组的UInt32。

所以：

var correctSymbolNumber = Int(arc4random_uniform(UInt32(cardSymbols.count - 1)))
var correctNumberNumber = Int(arc4random_uniform(UInt32(numbers.count - 1)))

var correctSymbol = cardSymbols[correctSymbolNumber]
var correctNumber = numbers[correctNumberNumber]

Answer 2

您必须将arc4random_uniform UInt32的值更改为Int。正如您所看到的，这是返回UInt32的arc4random_uniform函数的原型 func arc4random_uniform(_: UInt32) -> UInt32

var correctSymbolNumber = Int(arc4random_uniform(UInt32(cardSymbols.count - 1)))
var correctNumberNumber = Int(arc4random_uniform(UInt32(numbers.count - 1)))

也不要忘记打开correctSymbolNumber和correctNumberNumber值。

为什么我会收到此错误以及如何解决？迅速

2 个答案: