Question

我试图返回一个随机名称，此功能的随机电子邮件到目前为止，但我想知道我应该在这里返回什么，因为我想要返回它需要的元组我需要从函数

中随机选择2个字符串值

func randomAuthor () -> (name : String, email : String) {

    struct Author {

        var name : String
        var email : String

    }

    let firstAuthor = Author(name: "jon", email: "jonsEmail")
    let secondAuthor = Author(name: "richard", email: "richardsEmail")
    let thirdAuthor = Author(name: "steve", email: "stevesEmail")
    let fourthAuthor = Author(name: "simon", email: "simonsEmail")
    let fifthAtouh = Author(name: "wes", email: "wesEmail")

    var dictionary = [firstAuthor.name : firstAuthor.email, secondAuthor.name : secondAuthor.email, thirdAuthor.name : thirdAuthor.email, fourthAuthor.name : fourthAuthor.email, fifthAuthor.name : fithAtouh.email]

    var unsignedDictionaryCount = UInt32(dictionary.count)
    var unsignedRandom = arc4random_uniform(unsignedDictionaryCount)
    var random = unsignedRandom


    return()

}

任何帮助表示赞赏感谢

Answer 1

字典中的随机值分几步：

创建词典
使用Int

arc4random_uniform

使用此随机Int获取随机密钥（使用keys），并获取其值

归还他们，你就完蛋了！

var dictionary : [String:String] =  [firstAuthor.name : firstAuthor.email, secondAuthor.name : secondAuthor.email, thirdAuthor.name : thirdAuthor.email, fourthAuthor.name : fourthAuthor.email]
let index: Int = Int(arc4random_uniform(UInt32(dictionary.count)))
let value = Array(dictionary.values)[index]
let key = Array(dictionary.keys)[index]
let value = dictionary[key]
return (key, value!)

Answer 2

使用随机整数作为dictionary.keys的索引。这会获取您可以用来查找name。{/ p>的email

在swift中返回随机字典项

2 个答案: