/一个section刷新

NSIndexSet *indexSet=[[NSIndexSet alloc]initWithIndex:];

[tableview reloadSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];

//一个cell刷新

NSIndexPath *indexPath=[NSIndexPath indexPathForRow: inSection:];

[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath,nil] withRowAnimation:UITableViewRowAnimationNone];