NSMutableArray和NSDictionary笔记

    NSMutableArray *arrWinUserIds = [[NSMutableArray alloc] initWithCapacity:0];    for (int i = 0; i < 2; i ++) {        NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithLongLong:100+i], @"uid", [NSNumber numberWithLongLong:200+i], @"score", nil];        [arrWinUserIds addObject:dic];    }        NSDictionary *dic2 = [arrWinUserIds objectAtIndex:0];    NSLog(@"%@", dic2);    NSNumber *numId = [dic2 objectForKey:@"uid"];    NSNumber *numScore = [dic2 objectForKey:@"score"];        NSLog(@"%lld, %lld", numId.longLongValue, numScore.longLongValue);