OC导航栏跳转指定界面

方法一： 

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] 
animated:YES];
或
方法二： 
for (UIViewController *temp in self.navigationController.viewControllers) {
           if ([temp isKindOfClass:[你要跳转到的Controller class]]) {
              [self.navigationController popToViewController:temp animated:YES];
           }
       }

方法三：

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:([self.navigationController.viewControllers count] -2)] animated:YES];