Implement a protocol in Swift

Question

I am using an Objective-C library. It has a protocol as

@protocol RNFrostedSidebarDelegate <NSObject>
@optional
- (void)sidebar:(RNFrostedSidebar *)sidebar didTapItemAtIndex:(NSUInteger)index;
- (void)sidebar:(RNFrostedSidebar *)sidebar didEnable:(BOOL)itemEnabled itemAtIndex:(NSUInteger)index;
@end

I am trying to implement it in Swift. How should I write this func?

Like [this](http://stackoverflow.com/a/24099437/730701). – Adam Jun 13 '14 at 08:24 — Adam, Jun 13 '14 at 08:24

score 4 · Accepted Answer · answered Jun 13 '14 at 08:30

this would be a Swift class implementing the protocol

class MyForstedSidebarDelegate : RNFrostedSidebarDelegate {

    func sidebar(sidebar: RNFrostedSidebar, didTapItemAtIndex index: UInt) {
        ... do stuff ...
    }

    func sidebar(sidebar: RNFrostedSidebar, didEnable itemEnabled: Bool, itemAtIndex index: UInt) {
        ... do stuff ...
    }

}

score 0 · Answer 2 · answered Jun 13 '14 at 08:28

something like this could be similar to your original concept:

@objc protocol RNFrostedSidebarDelegate {
    @optional func sideBarDidTapItem(sidebar: RNFrostedSidebar, index: UInt) -> ()
    @optional func sideBarDidEnable(sidebar: RNFrostedSidebar, itemEnabled: Bool, index: UInt) -> ()
}

Implement a protocol in Swift

2 Answers2