我如何转换斯威夫特阵列为字符串？ [英] How do I convert a Swift Array to a String?

问题描述

我知道如何以编程方式做到这一点，但我敢肯定有一个内置的方式...

I know how to programmatically do it, but I'm sure there's a built-in way...

我用每一种语言都有某种默认的文本再presentation为对象的集合，它会吐出你试图用一个字符串来连接的阵列，或将其传递给print（）函数等有没有苹果的雨燕语言都容易转向数组为一个字符串，还是我们始终有一个内置的方式来字符串化数组时要明确？

Every language I've used has some sort of default textual representation for a collection of objects that it will spit out when you try to concatenate the Array with a string, or pass it to a print() function, etc. Does Apple's Swift language have a built-in way of easily turning an Array into a String, or do we always have to be explicit when stringifying an array?

推荐答案

如果数组包含字符串，你可以使用字符串的加入方法：

If the array contains strings, you can use the String's join method:

var array = ["1", "2", "3"]

let stringRepresentation = "-".join(array) // "1-2-3"

在 2斯威夫特

var array = ["1", "2", "3"]

let stringRepresentation = array.joinWithSeparator("-") // "1-2-3"

如果你想使用一个特定的分隔符（连字符，空白，逗号等），这可能是很有用的。

This can be useful if you want to use a specific separator (hypen, blank, comma, etc).

否则，你可以简单地使用说明属性，它返回一个字符串重数组的presentation：

Otherwise you can simply use the description property, which returns a string representation of the array:

let stringRepresentation = [1, 2, 3].description // "[1, 2, 3]"

提示：实施打印协议的任何对象有一个说明属性。如果你采用在自己的类/结构的协议，你让他们打印友好以及

Hint: any object implementing the Printable protocol has a description property. If you adopt that protocol in your own classes/structs, you make them print friendly as well

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