2
Q:

How can we achieve singleton pattern in iOS? 

Answer:
Q:

What is Automatic Reference Counting (ARC) ?

Answer

ARC is a compiler-level feature that simplifies the process of managing the lifetimes of Objective-C objects. Instead of you having to remember when to retain or release an object, ARC evaluates the lifetime requirements of your objects and automatically inserts the appropriate method calls at compile time.

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Subject: IOS - Technology

1 995
Q:

What is the purpose of UIWindow object?

Answer

The presentation of one or more views on a screen is coordinated by UIWindow object..

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Subject: IOS - Technology

6 737
Q:

What are the tools required to develop iOS applications?

Answer

IOS development requires Intel-based Macintosh computer and iOS SDK

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Subject: IOS - Technology

1 322
Q:

Which JSON framework is supported by iOS?

Answer

SBJson framework is supported by iOS. It is a JSON parser and generator for Objective-C. SBJson provides flexible APIs and additional control that makes JSON handling easier.

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Subject: IOS - Technology

5 1683
Q:

Which object is create by UIApplicationMain function at app launch time?

Answer

The app delegate object is created by UIApplicationMain function at app launch time. The app delegate object's main job is to handle state transitions within the app.

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