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Concept of protocols in Objective-C
Protocols are another important feature provided by Objective-C language. Basically protocols are used for a particular situation according to the need of a program. Within protocol methods will be declared which are expected to be used for a par...
Protocols it's usage and Types
Protocols are powerful functionality provided by iOS. These are set of behavior that is expected from an object to behave/respond in a given situation.
Protocols are set of methods and properties. One can define protocol as:
@protocol protoco...
Mandatory and optional methods in protocols
The methods and functions of the protocols can be categorized as, required or optional. The difference between these two specifiers is that, the programmer may or may not use the optional methods declared in the protocol, or may use some of them ...
