How Do I sort an NSMutable Array with NSNumbers in it?

Question

I\'m trying to make a high score table, and suck at arrays in objective c (actually, in general objective c is challenging for me), so I can\'t figure out how to sort. I\'m

Answer 1

[highscores sortUsingSelector:@selector(compare:)];

Should work if they're definitely all NSNumbers.

(Adding an object is:

[highscores addObject:score];

)

If you want to sort descending (highest-first):

10.6/iOS 4:

[highscores sortUsingComparator:^(id obj1, id obj2) {
    if (obj1 > obj2)
        return NSOrderedAscending;
    else if (obj1 < obj2)
        return NSOrderedDescending;

    return NSOrderedSame;
}];

Otherwise you can define a category method, e.g.:

@interface NSNumber (CustomSorting)

- (NSComparisonResult)reverseCompare:(NSNumber *)otherNumber;

@end

@implementation NSMutableArray (CustomSorting)

- (NSComparisonResult)reverseCompare:(NSNumber *)otherNumber {
    return [otherNumber compare:self];
}

@end

And call it:

[highscores sortUsingSelector:@selector(reverseCompare:)];