createNSMutableArrayOrderByRandom

-(NSMutableArray *)createNSMutableArray:(int)max
{
    NSMutableArray *numberArray = [NSMutableArray new];
    for (int i=1; i<=max; i++) {
        [numberArray addObject:[NSNumber numberWithInt:i]];
    }
    [self sortByRandom:numberArray];
    return numberArray;
}

-(NSMutableArray *)sortByRandom:(NSMutableArray *)array
{
    int arraySize = [array count];
    while (--arraySize >= 0) {
        int rand =arc4random()%totalCount;
        [array exchangeObjectAtIndex:rand withObjectAtIndex:arraySize];
    }
    return array;
}