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Objective-C : Categories
if you wants to add some more functionality in the class then use Categories.
Objective-C : Polymorphism
Polymorphism is a concept where objects can inherit functionality from a base class, and change it to provide specialised behaviour.
Objective-C : Command-Line Arguments
The command line arguments are handled using main() function arguments ...
Objective-C Error Handling
Objective-C programs use NSError objects to convey information about runtime errors that users need to be informed about.
Objective-C Exception Handling
Exceptions are used to inform the programmer about something that went wrong, while errors are used to inform the user that a requested action could not be completed...
Objective-C : Type Casting
Type Casting a process converting one type of object to another type of object. Every language a semantics of TypeCasting. Today we will discuss about type casting in Objective C.
Objective-C : Typedef
The typedef keyword lets you create new data types or redefine existing ones.
Objective-C : Preprocessor
Objective-C Preprocessor is just a text substitution tool and it instructs compiler to do required pre-processing before actual compilation.
Objective-C : Unions
Unions are syntactically similar to structs, but inside there are not three pieces of memory, only one.
Objective-C : Structures
Structs are a C construct that allows for grouping of items into one variable.
Objective-C : NSDictionary class
NSDictionary class represents an unordered collection of objects; however, they associate each value with a key...
Objective-C : Strings
The string in Objective-C programming language is represented using NSString and its subclass NSMutableString provides several ways for creating string objects.