Swift 中的 Objective-C id 相当于什么？
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What is the equivalent of an Objective-C id in Swift?
提问by Doug Richardson
I'm trying to use an @IBAction to tie up a button click event to a Swift method. In Objective-C the parameter type of the IBAction is id. What is the equivalent of id in Swift?
我正在尝试使用 @IBAction 将按钮单击事件绑定到 Swift 方法。在 Objective-C 中，IBAction 的参数类型是 id。Swift 中 id 的等价物是什么？
回答by Doug Richardson
Swift 3
斯威夫特 3
Any, if you know the sender is never nil.
Any，如果你知道发件人是永远nil。
@IBAction func buttonClicked(sender : Any) {
println("Button was clicked", sender)
}
Any?, if the sender could be nil.
Any?，如果发件人可以nil。
@IBAction func buttonClicked(sender : Any?) {
println("Button was clicked", sender)
}
Swift 2
斯威夫特 2
AnyObject, if you know the sender is never nil.
AnyObject，如果你知道发件人是永远nil。
@IBAction func buttonClicked(sender : AnyObject) {
println("Button was clicked", sender)
}
AnyObject?, if the sender could be nil.
AnyObject?，如果发件人可以nil。
@IBAction func buttonClicked(sender : AnyObject?) {
println("Button was clicked", sender)
}
回答by Nilesh Patel
AnyObject
任何对象
Other mapping type,
其他映射类型，
Remap certain Objective-C core types to their alternatives in Swift, like NSString to String
Remap certain Objective-C concepts to matching concepts in Swift, like pointers to optionals
将某些 Objective-C 核心类型重新映射到它们在 Swift 中的替代项，例如 NSString 到 String
将某些 Objective-C 概念重新映射到 Swift 中的匹配概念，例如指向可选项的指针
