无法使用索引类型为"UInt32"的下标来为类型为[String]的值下标.

问题描述

我一直在尝试创建代码以生成随机名称.在这里

i've been trying to create a code to generate random names. Here it is

import UIKit

 let arrayOfNames: [String] = ["Giovanni", "Simone", "Francesco", "Ahmet",       "Valerio", "Federico"]

 let arrayOfsNames: [String] = [" İl Genio", " Lo scemo", " Verga", " Fermi", " Medici", " L'assasino"]

 var casual1 = arc4random_uniform(7)
 var casual2 = arc4random_uniform(7)

 let name = "\(arrayOfNames[casual1]) + \(arrayOfsNames[casual2])"

  name

但是在"let name"行上，它给我标题上的错误.有谁知道为什么以及如何解决这个问题?

however on the "let name" line it gives me the mistake on the title. Does anyone know why and how to solve it?

推荐答案

您应该使用Int通过索引访问数组

You should use an Int to access an array by index

替换此

var casual1 = arc4random_uniform(7)
var casual2 = arc4random_uniform(7)

与此

var casual1 = Int(arc4random_uniform(7))
var casual2 = Int(arc4random_uniform(7))

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