ios - 将字符串转换为 Int 数组

Question

例如，我有这种类型的字符串:

var test:String = "[1, 0, 4]";

我需要将它转换为 Int 数组:

var testConverted:[Int] = [ 1, 0, 4 ];

Answer 1

您需要使用 stringByTrimmingCharactersInSet 修剪开始和结束括号，然后使用 componentsSeparatedByString 获取字符串元素数组。然后您最终可以使用 flatMap 从中创建一个整数数组。

例如:

let yourString = "[1, 0, 4]"

// trim off the start and end brackets of the string – then obtain an array of elements by using componentsSeparatedByString
let arrayOfStrings = yourString.stringByTrimmingCharactersInSet(NSCharacterSet(charactersInString: "[]")).componentsSeparatedByString(", ")

// flatMap the arrayOfStrings to an array of integers, filtering out any strings that cannot be represented as numbers
let arrayOfInts = arrayOfStrings.flatMap{Int($0)}
print(arrayOfInts)