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What is Objective-C Programming ?
Objective-C programming language adds Smalltalk-style messaging to C, providing object oriented capabilities and a dynamic runtime. It was created by Brad Cox and Tom Love in the early 1980s at their company Stepstone.. It is most often used in developing applications for Mac OS X and iOS. Objective C was created as a way for programmers to use the power of the Macintosh operating system while maintaining the kind of programs they were accustomed to writing. Mac users today are still enjoying the benefits of Objective C, which remains one of the most popular programming languages in use.
Objective-C was created to be a lighter version of the C language, offering an object-oriented feature set not available in traditional C. The resulting language, Objective-C, was integrated into a new operating system called NeXTSTEP and thus came to be written as Objective C. In 1996, Apple announced its own operating system, dubbed Mac OS X. It came bundled with its own programming language, also called Objective-C. Because the two versions of Objective-C are so similar, many programmers found that their skills could easily be adapted to either version of the language.
Types Of Objective-C Programming
- Object-Oriented Programming
Objective-C’s main strength is its object oriented approach to programming. What this means is that the language is designed around object-oriented programming, rather than the traditional, procedural style so common in other languages. By using classes and introducing collections of objects such as arrays and dictionaries into an application, it becomes far easier for programmers to develop complex applications.
- Dynamic Typing
In Objective-C, the type of a variable is known as its dynamic type. At runtime, the dynamic type is converted to an object’s class definition. This way, programmers don’t have to worry where their variables are being stored in memory. It’s all handled dynamically at runtime by the compiler.
- Class Structure and Object-Oriented Principles
Objective-C provides a structured approach to programming that offers many benefits for those who want to learn it. The basic building blocks of any Objective-C application are the classes. These objects direct all application processing because they, in turn, inherit from the base class object. All other object types in Objective-C automatically become subclasses to this class. If desired, you can easily create your own classes by extending them from other existing classes or even from new classes that you define yourself.
- Common Programming Techniques
The best way to understand how to use Objective-C is to understand what it’s not. Objective-C was designed so that it could work with C, but it is not simply another version of C. Despite this, many programmers will find that using the two languages in tandem does not present any problem for their programming style. Objective-C and C share many similarities, making learning the two languages a simple process for those who are willing to study them side by side.
Importance Of Objective-C Programming
- It is Easy to Learn and Simple to Use
With Objective-C, it’s easier for programmers of other languages such as Java and C++ to adapt their skills to the Mac OS X environment without having the need to learn an entirely different programming language. Programmers who are already familiar with C or even Java will find that they don’t have to change their programming style at all when they use Objective-C. The syntax is designed to be familiar, and the standard libraries are designed to appear similar to those of other languages.
- It is Versatile Language
In addition to being easy to learn, Objective-C is a versatile language that can be used in a number of different ways. Programmers can use it to create full applications, but they can also use it to create scripts or add-ons for existing applications. Those who want to learn Objective-C might choose this path because the opportunities for using it are so widespread and because it’s easier to add Objective-C code into an existing program than it is to completely rewrite the application.
- It can be Used for Various Programming Tasks
There are many different tasks that a programmer can accomplish with Objective-C. One of the most common uses is for creating user interfaces for applications. This type of application doesn’t have to be complicated at all in order to draw on the language’s strengths. More advanced programmers might use it to create third-party code libraries that other programmers will be able to use in their own software.
- It has a Short Learning Curve
Objective-C is easy to learn and simple to use, but it can also be a powerful language if you want it to be. No matter what you want to do with Objective-C, you’ll find that the time that it takes for you to actually learn the language is relatively short.
- It Allows Programmers to Create User Interfaces for Multiple Devices
Mac OS X can be used to develop applications for multiple devices. Depending on the type of device, you might choose to program with either Objective-C or Cocoa, and in each case you’ll have different libraries available to you, but going back and studying the differences between them won’t take very long at all.
Units Studied Under Objective-C Programming
The most important classes in Objective-C programming are NSObject, NSArray, and NSDictionary. These three classes are the building blocks of all objects in Objective-C, and they play an important role in any application that you write.
- The NSData class can be used to store a string or an array of data without the need to do any processing on the data right away. This is especially useful for storing images or video files that might have some processing to be done on them when they are saved.
- The NSArray class is an Objective-C array, which is made up of a variable number of objects. In addition to being an object, the array can also be treated as a traditional C array and manipulated as such. This makes it easier for programmers to use arrays in their programs.
- The NSDictionary class is used by programmers to store key-value pairs in memory. It’s possible for programmers to use this class to store other types of data besides just keys and values. The most common use of the NSDictionary class is as a way for developers to store key-value pairs in an object’s properties list.
- Another important class used in Objective-C programming is NSObject, which is the base type for all objects in Objective-C. This class is usually subclassed by custom classes that add specific functions to the object.
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