Copying an NSDate (wanting independent objects)

Question

NSDate conforms to NSCopying protocol. According to the documentation for NSCopying protocol:

a copy must be a functionally independent object with values ident         


        

Answer 1

copy does not guarantee different object pointer. “Functionally independent” means that changes to the original object will not be reflected in the copy, and thus for immutable objects copy may work as retain (I don't know if this is guaranteed though, probably not).

Try date2 = [[NSDate alloc] initWithTimeInterval:0 sinceDate:date1].