What is the difference between “copy” and “retain”?

Question

What is the difference between copy and retain for NSString?

- (void)setString:(NSString*)newString
{
    string = [ne         


        

Answer 1

Its an old post but here's my view on the question

Retain increases the retain count of an object by 1 and takes ownership of an object.

Whereas copy will copy the data present in the memory location and will assign it to the variable so in the case of copy you are first copying the data from a location assign it to the variable which increases the retain count.

Just remember that retain works on reference and copy works on value