如何将独立值绑定到数组中的字符串（Swift）？

Question

所以我正在练习编码并设置了一个字符串数组。我想要发生的是让一个函数随机选择一个字符串，如果选择了某个字符串，它将打印出一条消息，如果选择了任何其他字符串，它将打印出另一条消息。我认为可以使用 if-else 函数来设置消息，但我一直停留在弄清楚如何识别调用哪个字符串的较早步骤上。

我做了一些搜索，发现了这个线程Get Random String from an Array，我从中复制了随机化代码。我有点不知所措。

我需要设置什么类型的函数/标识符等以便唯一标识字符串？

class ViewController: UIViewController {
    
    // Make collection of games and if Monsters is called, print "Take a break." If a diff string is called, print "Do your homework."
    @IBAction func random(_ sender: UIButton) {
        let games = ["Cards Against Humanity", "Mario Kart", "Halo", "Pixeljunk Monsters"]
        let randomNumber = Int(arc4random_uniform(UInt32(games.count)))
        _ = games[randomNumber]
    }
} // end of class

Answer 1

从你的问题中你的期望不是很清楚，但我猜你是初学者，需要帮助处理随机选择的字符串。

@IBAction func random(_ sender: UIButton) {
            let games = ["Cards Against Humanity", "Mario Kart", "Halo", "Pixeljunk Monsters"]
            let randomNumber = Int(arc4random_uniform(UInt32(games.count)))
            let randomlyPickedString = games[randomNumber]
            if randomlyPickedString == "Cards Against Humanity" {
                print("Print anything you want about Cards Against Humanity")
            }
            else if randomlyPickedString == "Mario Kart" {
                print("Print anything you want about Mario Kart")
            }
            else if randomlyPickedString == "Halo" {
                print("Print anything you want about Halo")
            }
            else {
                print("Print anything you want about Pixeljunk Monsters")
            }
        }

如果它是数组中的一组有限值，您甚至可以决定使用switch