I have this enum in Swift
我的这个enum是Swift的。
enum Direction: Int{
case Left2Right = 0, Right2Left
}
And this protocol
这个协议
@objc protocol CellDelegate : NSObjectProtocol{
optional func has(direction:SwipeDirection) -> Bool
}
I am getting this error Method cannot be marked @objc because the type of the parameter cannot be represented in Objective-C
我得到这个错误方法不能被标记为@objc，因为参数的类型不能在Objective-C中表示
Can anybody tell me why do i get this error and how to fix it please? Thanks!
有人能告诉我为什么会出现这个错误吗?谢谢!
1 个解决方案
#1
7
The @objc attribute makes the protocol compatible (i.e. usable) with Objective C. But swift enums (prior to 1.2 beta) are not available in Objective C. So you cannot use a swift enum in that protocol.
@objc属性使协议与Objective c兼容(即可用)，但是swift enums(在1.2 beta之前)在Objective c中不可用，因此不能在该协议中使用swift enum。
I think that the best solution is to use swift 1.2 - it's still in beta (as of today), but it's possible to apply the @objc attribute to swift enums.
我认为最好的解决方案是使用swift 1.2——它仍然处于beta状态(到今天为止)，但是可以将@objc属性应用到swift enums。
#1
7
The @objc attribute makes the protocol compatible (i.e. usable) with Objective C. But swift enums (prior to 1.2 beta) are not available in Objective C. So you cannot use a swift enum in that protocol.
@objc属性使协议与Objective c兼容(即可用)，但是swift enums(在1.2 beta之前)在Objective c中不可用，因此不能在该协议中使用swift enum。
I think that the best solution is to use swift 1.2 - it's still in beta (as of today), but it's possible to apply the @objc attribute to swift enums.
我认为最好的解决方案是使用swift 1.2——它仍然处于beta状态(到今天为止)，但是可以将@objc属性应用到swift enums。