如何将元组添加到 Swift 数组? [英] How do I add a tuple to a Swift Array?

问题描述

我正在尝试向数组添加一个元组(例如，2 项元组).

I'm trying to add a tuple (e.g., 2-item tuple) to an array.

var myStringArray: (String,Int)[]? = nil
myStringArray += ("One", 1)

我得到的是:

What I'm getting is:

找不到接受提供的+="的重载论据

Could not find an overload for '+=' that accepts the supplied arguments

提示:我试图重载每本参考书的+=":

Hint: I tried to do an overload of the '+=' per reference book:

@assignment func += (inout left: (String,Int)[], right: (String,Int)[]) {
    left = (left:String+right:String, left:Int+right+Int)
}

...但没有做对.

有什么想法吗?...解决方案?

Any ideas? ...solution?

推荐答案

由于这仍然是 google 上将元组添加到数组的最佳答案，因此值得注意的是，在最新版本中情况略有变化.即:

Since this is still the top answer on google for adding tuples to an array, its worth noting that things have changed slightly in the latest release. namely:

声明/实例化数组时；类型现在嵌套在大括号内:

when declaring/instantiating arrays; the type is now nested within the braces:

var stuff:[(name: String, value: Int)] = []

复合赋值运算符，+=，现在用于连接数组；如果添加单个项目，则需要嵌套在数组中:

the compound assignment operator, +=, is now used for concatenating arrays; if adding a single item, it needs to be nested in an array:

stuff += [(name: "test 1", value: 1)]

还值得注意的是，在包含命名元组的数组上使用 append() 时，您可以提供要添加的元组的每个属性作为 append():

it also worth noting that when using append() on an array containing named tuples, you can provide each property of the tuple you're adding as an argument to append():

stuff.append((name: "test 2", value: 2))

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