从数组中获取随机字符串 [英] Get Random String from an Array

问题描述

我试图从数组firstArray"中获取一个随机字符串并将其打印在 UILabellabel"中.我似乎无法弄清楚，并且出现错误.感谢您的帮助.我尝试搜索，但找不到任何最新的教程/方法.

I am trying to get a random string from array "firstArray" and print it in UILabel "label". I cannot seem to figure it out and I get errors. Your help is appreciated. I tried searching but could not find any up-to-date tutorials/methods.

import UIKit

class ViewController: UIViewController {
    @IBOutlet var label: UILabel!

    @IBAction func random(_ sender: Any) {
        let firstArray = [ "hi" , "bye" , "hello"]
    }

推荐答案

我更喜欢使用 arc4random()，这段代码会从你的数组中随机选取项目:

I'd rather using arc4random(), this code will pick up random items from your array:

let firstArray = ["hi", "bye", "hello"]
    let randomItem = Int(arc4random() % UInt32(firstArray.count))
    myLabel.text = "\(firstArray[randomItem])"

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