Question

我正在尝试在一个打印语句中打印元素，例如[1,2,3,4,5]但没有围绕数据外部的括号。这可能吗？

Answer 1

试试这个 -

  let arrayName = ["1","2","3","4","5"]

    for element in arrayName {
        print(element, terminator: " ") // output 1 2 3 4 5
    }

回答你的第二个问题 -

    var string: String?
    for element in arrayName {
        if string == nil {
            string = element
        } else {
        string = string! + ", " + element
        }
    }
    print(string!) // output - 1, 2, 3, 4, 5

Answer 2

extension Array {
    var toPrint: String  {
        var str = ""
        for element in self {
            str += "\(element) "
        }
        return str
    }
}

let arrayName = ["1","2","3","4","5"]


print(arrayName.toPrint) // output: 1 2 3 4 5

基于Prema Janoti回答https://stackoverflow.com/a/42297499/7064692

更好的方法https://stackoverflow.com/a/31093744/7064692

Swift 3：如何打印没有括号的数组元素

2 个答案: