ios - 这行在 Swift 中意味着什么？

Question

我正在阅读 Swift 3 的书并在那里找到了这一行:

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

}

只有这样的描述:

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

我不明白 (numbers: Int...) 是什么意思。谁能给我解释一下？

Answer 1

它叫做可变参数，解释了here .

A variadic parameter accepts zero or more values of a specified type. You use a variadic parameter to specify that the parameter can be passed a varying number of input values when the function is called. Write variadic parameters by inserting three period characters (...) after the parameter’s type name.