以后别问这么白痴的问题了 太丢人了

NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];    for (char i = 'a'; i <= 'z'; i ++) {        NSMutableArray *ary = [[NSMutableArray alloc] init];        NSString *s = [NSString stringWithFormat:@"%c", i];        [dict setObject:ary forKey:s];    }    NSLog(@"%@",dict);