//返回上上一級控制器

UIViewController *mineVC = nil;
for (UIViewController * controllerin quickVC.navigationController.viewControllers) {//遍歷
 if ([controller isKindOfClass:[MineViewControllerclass]]) 
  { //這裡判斷是否為你想要跳轉的頁面
    mineVC = controller;
  } 

//返回到指定的控制器，要保證前面有入棧。

//返回到指定的控制器，要保證前面有入棧。
        int index = (int)[[self.navigationController viewControllers]indexOfObject:self];
        if (index>2) {
            [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:(index-2)] animated:YES];
        }else
        {
            [self.navigationController popToRootViewControllerAnimated:YES];
        }