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What is factory methods ? What is the advantage of using it ?

Question Posted / babu


What is factory methods ? What is the advantage of using it ?..

Answer / babu

Class factory methods are implemented by a class as a convenience for developers. These methods combine allocation and initialisation in a single step and return the created object.

NSDate:

Eg: + (id)dataWithBytes:(const void *)bytes length:(unsigned)length;

NSDictionary

Eg:+ (instancetype)dictionary;

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