ObjC isn't statically-typed. Static typing informations only allows the compiler to warn the programmer about type mismatch. From the official docs: "Staticall

ObjC isn't statically-typed. Static typing informations only allows the compiler to warn the programmer about type mismatch. From the official docs: "Statically typed objects have the same internal data structures as objects declared to be of type id. The type doesn't affect the object; it affects only the amount of information given to the compiler about the object and the amount of information available to those reading the source code."