By Maher Ali

With Advanced iOS four Programming, builders have the specialist tips they should create notable purposes for Apple's iPhone, iPad, and iPod touch.

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

This booklet concentrates on illustrating GUI options programmatically, permitting readers to completely savour the full photograph of iOS four improvement with out counting on Interface Builder. moreover, Interface Builder is roofed in different chapters.

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

Key positive aspects include:

  • Objective-C programming language and runtime
  • Interface Builder
  • Building complicated cellular consumer interfaces
  • Collections
  • Cocoa Touch
  • Core Animation and Quartz 2D
  • Model-view-controller (MVC) designs
  • Developing for the iPad
  • Grand significant Dispatch
  • Parsing XML files utilizing SAX, DOM, and TouchXML
  • Working with the Map equipment 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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Sample text

2 The Employee class declaration and definition demonstrating Objective-C properties. = aName){ [name release]; name = [aName copy]; } } The getter accessor returns a reference to the name instance variable. The setter accessor first checks to see if the new value for name is not the same as the current name value. If they are different, then the old object is released, and a copy (as instructed by the @property directive) of the aName is made and stored in the name instance variable. Note that in the dealloc method, you need to release name.

Every class implements at least one init method either explicitly or implicitly through the inheritance chain. If you override init, you should call your parent’s init first and then perform your initialization. This can be achieved using the super keyword. The keyword super makes the search for the method (here, init) start from the parent class rather than the class of the object, while the variable name self makes the search start from the class of the object where this statement is being executed.

Let’s assume, as an example, that giveMeANewString creates a large number of temporary objects in order to compute the return value. At the end of this method, these temporary objects are not needed. If you have only one autorelease pool in your application, these objects will linger until the end of the current run loop and then get released. To be able to reclaim the memory used by these temporary objects, you can create a new autorelease pool at the beginning of this method. All autoreleased objects generated by the method code (or calls made by the method) will go to this pool as it is on top of the pool stack.

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