＆＃34; SWIFT＆＃34;字符串到名称数组

Question

要命名数组的字符串？

var listArr = ["arr1","arr2","arr3","arr4"]
var arr1 = ["aa","bb","cc","dd"]
var arr2 = ["aaw","aww","awwww"]


let test1 = listArr[0]  // get "arr1" - string
test1[2]        // ??? need "cc"

//（好的，其他方式

vet test2 = listArr [0] +＆＃34; 2＆＃34;

test2 [0] // ???需要＆＃34; aaw＆＃34;

Answer 1

使用字典。

var listArr = ["arr1","arr2","arr3","arr4"]
arrays = {"arr1": ["aa", "bb"], "arr2": ["aaa", "bbb"]}

let test1 = arrays[listArr[0]]

Answer 2

如果您想将数组加入其中，然后想要访问该元素，那么您可以像这样使用flatMap。

var arr1 = ["aa","bb","cc","dd"]
var arr2 = ["aaa","aaa","aaa"]
var arr3 = ["ddd","ddd","ddd"]
var arr4 = ["ttt","ttt","ttt","ttt"]
let listArr = [arr1,arr2,arr3,arr4].flatMap{$0}//Output will be ["aa", "bb", "cc", "dd", "aaa", "aaa", "aaa", "ddd", "ddd", "ddd", "ttt", "ttt", "ttt", "ttt"]
for str in listArr {
  print(str)
}