Question

I have an unsigned int variable and it can only have the values of 0 -> 30. What should I use: unsigned int or NSUInteger? (for both 32 and 64 bit)

Answer 1

Running this:

    int sizeLong = sizeof(unsigned long);
    int sizeInt = sizeof(unsigned int);
    NSLog(@"%d, %d", sizeLong, sizeInt);

on 64bits gives:
8, 4
on 32 bits gives:
4, 4
So that yes, on 64 bits unsigned long (NSUInteger) takes twice as much memory as NSUInteger on 32 bits.