By Keith Lee
The Objective-C programming language maintains to develop in attractiveness and utilization due to the energy and ease-of-use of the language itself, besides the varied gains that stay extra to the platform. in case you have a easy wisdom of the language and wish to additional your services, professional Objective-C is the ebook for you.
Pro Objective-C presents an in-depth, finished advisor to the language, its runtime, and key API’s. It explains the foremost innovations of Objective-C in a transparent, effortless to appreciate demeanour, and likewise presents distinctive insurance of its extra advanced positive aspects. additionally, the ebook comprises a variety of useful examples--code excerpts and entire applications--that display the best way to follow in code what you’re learning.
The e-book starts off with an exploration of Objective-C's simple good points and key language parts. After reviewing the fundamentals, it proceeds with an in-depth exam of the Objective-C dynamic programming positive aspects and runtime procedure. subsequent the ebook covers the root Framework, the bottom layer of APIs that may be used for any Objective-C application. eventually, new and complicated positive factors of Objective-C are brought and proven how they make the Objective-C language much more strong and expressive.
Each subject is roofed completely and is filled with the main points you must improve Objective-C code successfully. an important positive factors are given in-depth remedy, and every bankruptcy includes quite a few examples that show either the facility and the subtlety of Objective-C.
Start studying professional Objective-C and start constructing high quality, specialist apps at the OS X and iOS structures utilizing the Objective-C programming language!
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Additional resources for Pro Objective-C
Extensions can also declare instance variables and properties. Xcode provides templates for creating Objective-C classes, protocols, categories, and extensions, thereby making it easy to get started developing your own classes. This has been a detailed primer on developing classes using Objective-C and Xcode, so this is a good time to take a break and review what you’ve gone over. In the next chapter, you’ll pick up where you left off by exploring the details of object messaging using Objective-C.
A category interface declaration begins with the @interface keyword followed by the name of the existing class and the category name in parentheses followed by the protocols it adopts (if any). It ends with the @end keyword. Between these statements, the method declarations are provided. The syntax of a category declaration is shown in Listing 2-19. Listing 2-19. Category Declaration Syntax @interface ClassName (CategoryName) // Method declarations @end Now let’s extend the Atom class by adding a category.
You created a Hydrogen class with custom initialization and factory methods, and tested it to verify that it works as expected. Now that you are comfortable with object creation and initialization using Objective-C, let’s focus on object messaging. 44 CHAPTER 3: Objects and Messaging Message Dispatch Messaging is a fundamental concept in OOP. It is the mechanism used to invoke a method on an object. , receiver) of a message determines at runtime which of its instance methods to invoke. Instance methods have access to an object’s instance variables along with its instance methods.
Pro Objective-C by Keith Lee