Is nsobject a parent class or a derived class?
How to implement in app purchase in ios objective c?
How to declare global variable in objective c?
Explain when to use nsarray and nsmutablearray. Which one is faster and threadsafe?
How would I make a static strategy?
How is #import different from #include?
What is the use of synchronized() block in objective c?
How dispatch_once runs only once?
How declare methods in objective c?
When should you call dealloc method? Is it possible to implement dealloc in arc?
What is a protocol in objective c?
What are the adavantages of gcd over nsthread?
What is meant by not thread safe?
What is an instancetype?
What are the delegate?