Blocks are an Apple extension to the Objective-C language that were motivated by the desire to pass small pieces of code in API calls to the Grand Central Dispatch multithreading system.
Pointers in Objective-C are easy and fun to learn. Some Objective-C programming tasks are performed more easily with pointers, and other tasks, such as dynamic memory allocation, cannot be performed without using pointers.
One of the most important concepts in object-oriented programming is that of inheritance. Inheritance allows us to define a class in terms of another class which makes it easier to create and maintain an application.
Basically extern keyword extends the visibility of the C variables and C functions. Probably that’s is the reason why it was named as extern.
structure is another user-defined data type available in Objective-C programming which allows you to combine data items of different kinds.
In this article we will cover- Objective C Data Types and at the time of variable creation what types of symbols we use and how to create objects in Objective C.
Here we are going to describe some basics of Objective C, such as its interface,headers,methods.
In this article I will describe the tools needed to develop iOS Sofware applications.