Swift 3：如何打印沒有括號的數組的元素

Question

我試圖在一個打印語句中打印元素，例如[1，2，3，4，5]，但數據外部沒有括號。這可能嗎？

Answer 1

試試這個 -

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

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

答你的第二個問題 - 基於普里馬Janoti答案

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 arrayName { 
      str += "\(element) " 
     } 
     return str 
    } 
} 

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


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

https://stackoverflow.com/a/42297499/7064692

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