分解成个体变量

可以使用以下语法将元组分解为单个变量：

let myTuple = (name: "Some Name", age: 26)
let (first, second) = myTuple

print(first) // "Some Name"
print(second)  // 26

无论元组是否具有未命名的属性，都可以使用此语法：

let unnamedTuple = ("uno", "dos")
let (one, two) = unnamedTuple
print(one) // "uno"
print(two) // "dos"

使用下划线（_）可以忽略特定属性：

let longTuple = ("ichi", "ni", "san")
let (_, _, third) = longTuple
print(third) // "san"