ios - 快速返回随机字典项

Question

到目前为止，我正在尝试从该函数返回一个随机名称和一封随机电子邮件，但我想知道我应该在这里返回什么，因为我想返回一个元组，它需要是 2 个字符串值我需要从我的函数中随机获取

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()

}

感谢任何帮助 谢谢

Answer 1

分几步从字典中随机取值:

1. 创建你的词典
2. 使用arc4random_uniform获取随机Int
3. 使用这个随机的Int得到一个随机的key(using keys)，并得到它的值

4. 返回它们，您就完成了!

   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!)