Objective c calling optional protocol method. Aug 21, - What Objective-C protocols are in Swift is very special. There is so much that was added specifically for it. It's also weaker and not Swift-y, even though you can use optional. So, optional is not supported on Swift protocols, unless they are exported into Objective-C, because that time, they become.

Objective c calling optional protocol method

Objective-C Protocol and Delegates- antiege.org

Objective c calling optional protocol method. Jun 22, - Optional protocol methods simply mean the object implementing the protocol does not have to implement the method in question - the callee then absolutely must check whether the object implements the method before calling (otherwise you'll crash, as you noticed). These NSObject HOM categories can  ios - How do I use optional protocol methods in Objective-C.

Objective c calling optional protocol method

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