swift3 - How do you write a completion handler in Swift 3? -


i wondering how make completion handler function i'm creating in swift 3. how did function right before updated swift 3:

func logout(completionhandler: (success: bool) -> ()) {     backendless.userservice.logout(         { ( user : anyobject!) -> () in             print("user logged out.")             completionhandler(success: true)         },         error: { ( fault : fault!) -> () in             print("server reported error: \(fault)")             completionhandler(success: false)     })}

but can't figure out best approach works right now.

in swift 3 function parameter labels in closures gone.

remove occurrences of success: , add @escaping

func logout(completionhandler:@escaping (bool) -> ()) {     backendless?.userservice.logout(         { user in             print("user logged out.")             completionhandler(true)         },         error: { fault in             print("server reported error: \(fault)")             completionhandler(false)     }) }

and use it

logout() { success in    print(success) }

-

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