kxhqdeqm

$139.99

Description

.. (private , public , class , struct , static , weak , unowned , guard , guard let , optionals , optional chaining , defer , subscripts , set , typealias, extention) (Closure , capture List , Trailing closure , Completion handler , protocol Extension , The Delegate pattern , data Source Pattern , ARC , Delegate Retain Cycle , Escaping and autoclosures)