iOS UITableViewCell刷新某些行的cell或section

//一个section刷新

                NSIndexSet *indexSet=[[NSIndexSet alloc]initWithIndex:2];    
                //为了避免重新加载时出现不需要的动画（又名“闪烁”)
                BOOL animationsEnabled = [UIView areAnimationsEnabled];
                [UIView setAnimationsEnabled:NO];
                [self.tableView reloadSections:indexSet withRowAnimation:UITableViewRowAnimationAutomatic];
                [UIView setAnimationsEnabled:animationsEnabled];

//一个或多个cell刷新

NSIndexPath *indexPath1=[NSIndexPath indexPathForRow:2 inSection:0];  
NSIndexPath *indexPath2=[NSIndexPath indexPathForRow:1 inSection:2];
//为了避免重新加载时出现不需要的动画（又名“闪烁”)
BOOL animationsEnabled = [UIView areAnimationsEnabled];
[UIView setAnimationsEnabled:NO];
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath1,indexPath2,nil] withRowAnimation:UITableViewRowAnimationNone];  
[UIView setAnimationsEnabled:animationsEnabled];