为什么我得到错误“参数类型'字符串'不符合预期类型'序列' [英] Why do I get the error "Argument type 'String' does not conform to expected type 'sequence'

问题描述

我正在尝试将用户输入从textField转换为数组。
我按照此处提供的代码 https://stackoverflow.com/a/27501398

I'm trying to convert user input from a textField to an array. I followed the code that was offered here https://stackoverflow.com/a/27501398

let someString : String = someTextField.text!
let someArray = Array(someString).map { String($0).toInt()! }

然后我收到此错误：

 Argument type "String" does not conform to expected type "Sequence"

我做错了什么？

推荐答案

似乎从Swift 2.0开始， String 不再符合 SequenceType 。如果你真的喜欢函数式编程，你可以解决这个问题。但是，这里没有必要这么花哨：

It seems that as of Swift 2.0, String no longer conforms to SequenceType. You can work around this if you're really in love with functional programming. However, there's no need to get so fancy here:

let text : String = "12345"
var digits = [Int]()
for element in text.characters {
    digits.append(Int(String(element))!)
}

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