编程小翁

摘要： NSMutableDictionary *dic = [NSMutableDictionary dictionary]; [dic setValue:@"1" forKey:@"a"]; [dic setValue:@"3" forKey:@"c"]; [dic setValue:@"2" forKey:@"b"]; NSLog(@"dic:%@",dic);结果是 abc若换成NSMutableArray，用addObject的方法，结果是插入的顺序。所 阅读全文