iOS导航跳转到指定页面

从不同界面跳转到当前界面，当前页面返回的时候要返回到前几级界面，界面数不确定。

personViewController * MyNeedJumpVC=[[personViewControlleralloc]init];

UINavigationController *navVC = self.navigationController;

NSMutableArray *viewControllers = [[NSMutableArrayalloc] init];

for (UIViewController *vcin [navVC viewControllers]) {

     [viewControllers addObject:vc];

     if ([vc isKindOfClass:[MyNeedJumpVCclass]]) {

           break;

     }

}

[navVC setViewControllers:viewControllersanimated:YES];