By Maher Ali

With Advanced iOS four Programming, builders have the specialist advice they should create outstanding functions for Apple's iPhone, iPad, and iPod contact.

Inside, veteran cellular developer Dr. Maher Ali starts off with a beginning advent to goal C and Cocoa contact programming, after which publications readers via development apps with Apple's iPhone SDK four – together with assurance of the key different types of recent APIs and construction apps for the recent Apple iPad.

This booklet concentrates on illustrating GUI thoughts programmatically, permitting readers to completely have fun with the full photograph of iOS four improvement with out hoping on Interface Builder. furthermore, Interface Builder is roofed in different chapters.

Advanced iOS four Programming delves into extra complex subject matters going past the fundamentals of iOS four improvement, offering accomplished assurance that can assist you get your apps to the App shop quicker.

Key gains include:

  • Objective-C programming language and runtime
  • Interface Builder
  • Building complex cellular person interfaces
  • Collections
  • Cocoa Touch
  • Core Animation and Quartz 2D
  • Model-view-controller (MVC) designs
  • Developing for the iPad
  • Grand crucial Dispatch
  • Parsing XML records utilizing SAX, DOM, and TouchXML
  • Working with the Map package API
  • Remote and native Push Notification
  • Blocks (closures) in Objective-C
  • Building complicated location-based applications
  • Developing database functions utilizing the SQLite engine
  • GameKit framework

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12, we introduce blocks and Grand Central Dispatch. 13, we discuss, at great length, the topic of the Objective-C runtime system. 14. We have a lot to cover, so let’s get started. 1 Classes In object-oriented languages, an object encapsulates attributes and provides methods. , other objects) to change the object’s state as well as to interact 20 Advanced iOS 4 Programming with the object. All this can be achieved without opening the actual implementation of the object’s behavior to the outside world.

7 Exceptions and Errors As a developer, you will find that even the simplest of your applications will someday face an unexpected event resulting in a change in the normal execution of your code. This event could simply be a division-by-zero, sending an undefined message to an object, or adding an element to an immutable collection. Regardless of the type of the error, your application needs to be aware of the possibility of its occurrence so that it can handle it gracefully when it does occur. Cocoa divides these unexpected events into two categories: (1) those that are the developer’s fault and (2) those that are the user’s fault.

You would expect that the A and X objects would be released and their respective dealloc methods would get called. But neither of these events occurs! retainCount); [a release]; [pool release]; return 0; } The X instance and whatever objects it has created and retained, and the A instance and whatever other objects it has created and retained, remain in memory. Of course, in the situation above, this 36 Advanced iOS 4 Programming memory will be reclaimed by iOS when the application terminates, but that’s just the example.

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