Which of the following is best JSON library to be used in iOS applications

How can an SMS be sent programmatically from the iPhone (iOS 4.0 or later)?

Difference between assign and retain in Objective-C?

Which property would be used to get the UDID of UIDevice on iOS?

When does this behavior usually happen? 'Xcode Message: finished running ' on targeted device shows, but nothing happens

Is it possible to set multiple architecture from Build Settings tab in Xcode for a project?

What is the default value of the borderColor property of the CALayer class?

By default, is the search interface visible in the UISearchDisplayController class?

Which properties of the CAKeyframeAnimation class represents an optional array of NSNumber objects that define the duration of each keyframe segment?

Which languages can be used to write the code for Xcode projects?

Which copy functions will you use in Objective-C to create an entirely new compound object?