How dispatch_once runs only once?
What is a class in xcode?
How do you write an objective statement?
What is an m file?
How do I create a bridging header file?
What is property in objective c?
What is the point of closures?
What are nsautoreleasepool and how can we use them?
Is c and objective c the same?
What is #import?
What is an objective fact?
What is dynamic dispatch method?
Is objective c better than swift?
What is the difference between atomic and nonatomic synthesized properties?
Tell me something about objective-c blocks?