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objective-ciosnsmutableset

Sorting NSMutableSet

I have to use NSMutableSet to store my string objects. I wan to store them in right order for example from smallest to biggest number:

1
2
3
4

How ever if do this:

NSMutableSet *set = [[NSMutableSet alloc] init];
[set addObject:[NSString stringWithFormat:@"1"]];
[set addObject:[NSString stringWithFormat:@"2"]];
[set addObject:[NSString stringWithFormat:@"3"]];
[set addObject:[NSString stringWithFormat:@"4"]];
NSLog(@"set is %@",set);
[set release];

I don't get what i wanted but instead this:

set is {(
    3,
    1,
    4,
    2
)}

So I guess i need to sort them to get wanted result ? But really i can't find any example.

Maybe someone could help me on this ?

Thanks.

EDIT: I can't use else. Just NSMutableSet or NSSet

Solution

  • If there's any characteristic of the NSSet is that they dont have any order!

    You should use a NSMutableArray for your purpose.

    Read about collections here, it will help you

    https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Collections/Collections.html#//apple_ref/doc/uid/10000034-BBCFIHFH