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home / developersection / interviews / what is the difference between retain & assign?
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Tarun Kumar
Tarun Kumar

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1 Answers

Tarun Kumar
Tarun Kumar 02 Aug 2015
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Assign creates a reference from one object to another without increasing the source’s retain count.
if (obj1 !=
ob2)

{ 
   [obj1 release]; 
   obj1 = nil; 
   obj1 = obj2;

}

Retain creates a reference from one object to another and increases the retain count of the source object.

if (obj1 !=
obj2)

{
   [obj1
release];
   obj1 = nil; 
   obj1 = [obj2 retain]; 

}
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