为数组创建扩展:

extension Array {

    var string: String? {

        do {

            let data = try JSONSerialization.data(withJSONObject: self, options: [.prettyPrinted])

            return String(data: data, encoding: .utf8)

        } catch {

            return nil
        }
    }
}

使用Swift 5，根据您的需要，您可以选择以下Playground示例代码之一来解决您的问题。

将字符数组转换为不带分隔符的字符串:

let characterArray: [Character] = ["J", "o", "h", "n"]
let string = String(characterArray)

print(string)
// prints "John"

将String数组转换为不带分隔符的String:

let stringArray = ["Bob", "Dan", "Bryan"]
let string = stringArray.joined(separator: "")

print(string) // prints: "BobDanBryan"

将字符串数组转换为单词之间带有分隔符的字符串:

let stringArray = ["Bob", "Dan", "Bryan"]
let string = stringArray.joined(separator: " ")

print(string) // prints: "Bob Dan Bryan"

将字符串数组转换为字符之间带有分隔符的字符串:

let stringArray = ["car", "bike", "boat"]
let characterArray = stringArray.flatMap { $0 }
let stringArray2 = characterArray.map { String($0) }
let string = stringArray2.joined(separator: ", ")

print(string) // prints: "c, a, r, b, i, k, e, b, o, a, t"

将float数组转换为数字之间带有分隔符的String:

let floatArray = [12, 14.6, 35]
let stringArray = floatArray.map { String($0) }
let string = stringArray.joined(separator: "-")

print(string)
// prints "12.0-14.6-35.0"

你可以使用循环来完成这个任务。或者使用地图。

通过映射:

let array = ["one" , "two" , "three"]
    
array.map({$0}).joined(seperator : ",")

在分隔符中，你可以修改字符串。

Output-> ("one,two,three")

为数组创建扩展:

extension Array {

    var string: String? {

        do {

            let data = try JSONSerialization.data(withJSONObject: self, options: [.prettyPrinted])

            return String(data: data, encoding: .utf8)

        } catch {

            return nil
        }
    }
}

如果你有字符串数组列表，那么转换为Int

let arrayList = list.map { Int($0)!} 
     arrayList.description

它会给你字符串值

斯威夫特3

["I Love","Swift"].joined(separator:" ") // previously joinWithSeparator(" ")