arrays - 如何快速初始化我的数组

Question

我有这个代码用于我想制作的问答应用程序。它应该从数组中随机询问一个问题。我的代码在 Playground 上运行，但是当我将它放入 xcode 项目时，它告诉我:

不能在属性初始值设定项中使用实例成员“Kat1”；属性初始值设定项在“self”可用之前运行

我刚开始编写应用程序和 swift，我不知道如何以正确的方式初始化数组。

这是我使用的代码:

var Kat1: [(question: String, answer: String)] =
    [
        ("What is the capital of Alabama?", "Montgomery"),
        ("What is the capital of Alaska?", "Juneau"),
        ("What is the capital of Test?", "Test Town")
]

var antal = (Kat1.count)
var randomtal = Int(arc4random_uniform(UInt32(antal)))

print(Kat1[randomtal].question)
print(Kat1[randomtal].answer)`

我做错了什么？

Answer 1

把你的代码放在一个函数里....

   override func viewDidLoad() {
    super.viewDidLoad()

var Kat1: [(question: String, answer: String)] =
[
    ("What is the capital of Alabama?", "Montgomery"),
    ("What is the capital of Alaska?", "Juneau"),
    ("What is the capital of Test?", "Test Town")
]

var antal = (Kat1.count)
var randomtal = Int(arc4random_uniform(UInt32(antal)))

print(Kat1[randomtal].question)
print(Kat1[randomtal].answer)`
}