Grand Central Dispatch (GCD) comprises language features, runtime libraries, and system enhancements that provide systemic, comprehensive improvements to the support for concurrent code execution on multicore hardware in iOS and OS X.
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provides a mechanism for broadcasting information within a program, using notification we can send message to other object by adding obser...
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Abstract Factory Pattern Its a creational design pattern. It's extension to factory method. It creates more level of abstraction t... -
An IPA has a built-in structure for iTunes and AppStore to recognize, The example below shows the structure of an IPA, /Payload/ /Pay...
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reference:- http://www.techotopia.com/ iOS Architecture Application runs above the Cocoa Touch layer. Application can call an... -
Prototype Pattern Its a creational design pattern. Its normally used to create duplicate objects. This pattern is used normally when th... -
Watchkit is extension to you iOS app. To add watchkit to app follow below steps(1.File new target watchkit app which will add wathkitap...
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Objective C 2.0 introduces garbage collection to take care of memory. Reference Counting/Retain counting:- Every object has an integ...
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Singleton Design Pattern Its creational design pattern. Singleton pattern is to ensure that a class has only one instance and provides ... -
NSAutoreleasePool:- The NSAutoreleasePool class is used to support Cocoa’s reference-counted memory management system. An autor...
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layoutSubviews is a method that is called automatically during view size changes. It can be used by a custom view to perform addit...
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