如何创建元组数组? [英] How do I create an array of tuples?

问题描述

我正在尝试在 Swift 中创建一个元组数组，但遇到了很大的困难:

I'm trying to create an array of tuples in Swift, but having great difficulty:

var fun: (num1: Int, num2: Int)[] = (num1: Int, num2: Int)[]()

以上导致编译器错误.

为什么不对?以下工作正常:

Why's that wrong? The following works correctly:

var foo: Int[] = Int[]()

推荐答案

它与类型别名一起使用:

It works with a type alias:

typealias mytuple = (num1: Int, num2: Int)

var fun: mytuple[] = mytuple[]()
// Or just: var fun = mytuple[]()
fun.append((1,2))
fun.append((3,4))

println(fun)
// [(1, 2), (3, 4)]

更新:从 Xcode 6 Beta 3 开始，数组语法发生了变化:

Update: As of Xcode 6 Beta 3, the array syntax has changed:

var fun: [mytuple] = [mytuple]()
// Or just: var fun = [mytuple]()

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