//一個section刷新
NSIndexSet?*indexSet=[[NSIndexSet?alloc]initWithIndex:2];
[tableview?reloadSections:indexSet?withRowAnimation:UITableViewRowAnimationAutomatic];
//一個cell刷新
NSIndexPath?*indexPath=[NSIndexPath?indexPathForRow:3?inSection:0];
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath,nil] withRowAnimation:UITableViewRowAnimationNone];
