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

无法使用索引类型为

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?

答

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))

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

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