在 Swift 中将数组传递给具有可变数量参数的函数 [英] Passing an array to a function with variable number of args in Swift

问题描述

在 Swift 编程语言，它说:

函数也可以接受可变数量的参数，将它们收集到一个数组中.

Functions can also take a variable number of arguments, collecting them into an array.

  func sumOf(numbers: Int...) -> Int {
      ...
  }

当我使用逗号分隔的数字列表 (`sumOf(1, 2, 3, 4) 调用此类函数时，它们在函数内作为数组可用.

When I call such a function with a comma-separated list of numbers (`sumOf(1, 2, 3, 4), they are made available as an array inside the function.

问题:如果我已经有一个数字数组想要传递给这个函数怎么办?

Question: what if I already have an array of numbers that I want to pass to this function?

let numbers = [1, 2, 3, 4]
sumOf(numbers)

这会失败并出现编译器错误，找不到接受提供的参数的 '__conversion' 的重载".有没有办法将现有数组转换为可以传递给可变参数函数的元素列表?

This fails with a compiler error, "Could not find an overload for '__conversion' that accepts the supplied arguments". Is there a way to turn an existing array into a list of elements that I can pass to a variadic function?

推荐答案

Splatting is not in the language然而，正如开发人员所证实的那样.目前的解决方法是使用重载，或者如果无法添加重载则等待.

Splatting is not in the language yet, as confirmed by the devs. Workaround for now is to use an overload or wait if you cannot add overloads.

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