How to shuffle array

shuffleArray

- (NSArray *)randomShuffle:(NSMutableArray *)array
{
    for (NSInteger i=0; i<[array count]; i++) {
        int exchagingIndex = arc4random() % [array count];//from 0 to count
        [array exchangeObjectAtIndex:i withObjectAtIndex:exchagingIndex];
    }
    return array;
}