Why to use [super init] in Objective C constructors?

Question

Say I have a class named Item. Which is a superclass of NewsItem and TwitterItem.

If I want to create some NewsItem\'s do I have to use (inside constructor)

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Answer 1

Because you are overriding the init message. If you don't override it then [[NewsItem alloc] init] would just call the superclass' init message. In C#, you might use base to do the same.