UITableView刷新一行、一个区

//一个section刷新    NSIndexSet *indexSet=[[NSIndexSet alloc]initWithIndex:2];    [tableview reloadSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];    //一个cell刷新    NSIndexPath *indexPath=[NSIndexPath indexPathForRow:3 inSection:0];    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath,nil] withRowAnimation:UITableViewRowAnimationNone];// 加入一行cell[_timeBucketArrayM addObject:@"cc"];[self.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:_timeBucketArrayM.count - 1 inSection:0]] withRowAnimation:UITableViewRowAnimationFade];