I have this function signature on a delegate
func session(_ session: WCSession, didReceiveUserInfo userInfo: [String : Any] = [:])
I need to create a closure on a Singleton to forward that delegate method, then I do this:
typealias sessionDidReceiveUserInfoHandler = (WCSession, [String : Any]) -> Void
var sessionDidReceiveUserInfo: sessionDidReceiveUserInfoHandler?
and I use it like this:
let mySingleton = MySingleton.sharedInstance
mySingleton.sessionDidReceiveUserInfo = {(session, userInfo) in }
Now I have this function signature with the @escaping clause
func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Void) {
How do I do that for that signature. Xcode will not let me to add the escaping to the typealias like this:
typealias sessionDidReceiveMessageReplyHandlerHandler = (WCSession, [String : Any], @escaping ([String : Any])) -> Void
and if I create a typealias without the escaping it will not let me use inside the function with the error message
Cannot convert value of type ‘([String : Any]) -> Void’ to expected
argument type ‘[String : Any]’
>Solution :
You’re missing a return type on the closure (ie inside the last )):
typealias sessionDidReceiveMessageReplyHandlerHandler = (WCSession, [String : Any], @escaping ([String : Any]) -> Void) -> Void