How to restore Consumable In-App Purchases?

A UITableViewController's tableview must have its delegate explicitly set by the developer.

What are @try and @catch?

What's the difference between nil and NULL?

How is a selector typically represented in memory?

Which of these methods is NOT invoked by the runtime itself?

In Objective-C, retain counts are the way in which memory is managed.

Objective-C allows you to define protocols, which declare the methods expected to be used for a particular situation.

The description above is essentially related to which feature of Objective-C programming language ?

Which one is the base class of all objects in Objective-c ?

Which method creates and returns an NSNumber object containing a given value, treating it as an NSInteger.