将一系列枚举从Swift桥接到Objective-C [英] Bridging an array of enums from Swift to Objective-C

问题描述

从Swift 1.2开始，就可以将Swift中的枚举自动转换为Objective-C.但是，据我所知，不可能转换一个枚举数组.这是真的吗?

Since Swift 1.2 it's been possible to automatically convert enums in Swift to Objective-C. However, as far as I can tell, it is not possible to convert an array of enums. Is this true?

因此，这是可能的:

@objc public enum SomeEnumType: Int {
    case OneCase
    case AnotherCase
}

但这不是:

public func someFunc(someArrayOfEnums: Array<SomeEnumType>) -> Bool {
    return true
}

任何人都可以验证吗?您如何建议解决此问题?一种方法是具有两个方法声明，例如:

Can anyone verify this? And how would you recommend working around this? One approach would be to have two method declarations e.g:

// This will not automatically get bridged.
public func someFunc(someArrayOfEnums: Array<SomeEnumType>) -> Bool {
    return true
}

// This will automatically get bridged.
public func someFunc(someArrayOfEnums: Array<Int>) -> Bool {
    return true
}

但这会污染Swift界面.有什么方法可以为任何Swift使用者隐藏第二个函数声明?

But this is polluting the Swift interface. Any way to hide the second function declaration for any Swift consumers?

推荐答案

似乎，即使SomeEnumType是@objc，我们也无法将Array<SomeEnumType>参数公开给Obj-C.

It seems, we cannot expose Array<SomeEnumType> parameter to Obj-C even if SomeEnumType is @objc.

作为一种解决方法，如何:

As a workaround, how about:

@objc(someFunc:)
func objc_someFunc(someArrayOfEnums: Array<Int>) -> Bool {
    return someFunc(someArrayOfEnums.map({ SomeEnumType(rawValue: $0)! }))
}

func someFunc(someArrayOfEnums: Array<SomeEnumType>) -> Bool {
    return true
}

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