方式一，不推薦
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];
方式二按厘，推薦
for (UIViewController *controller in self.navigationController.viewControllers)?
{? ? if ([controller isKindOfClass:[你要跳轉(zhuǎn)到的Controller class]]) {? ? ? ? [self.navigationControllerpopToViewController:controller animated:YES];? ?
?}}
方式三纲菌，推薦? 這種方式可以適合返回指定控制器并調(diào)用其方法（比如刷新）
// 返回調(diào)用的控制器?
LLXXXcontroller *myControl = nil;? ??
for (int i = 0; i < self.navigationController.viewControllers.count; i++) {? ?
?? ? CustomViewController *cv = self.navigationController.viewControllers[i];? ? ?
?? if ([cv isKindOfClass:[LLXXXcontroller class]]) {? ? ??
? ? ?myControl = (LLXXXcontroller *)cv;? ? ? ? ??
? break;?
?}? ? }?
?? [self.navigationController popToViewController:myControl animated:YES];? ?
?[myControl refreshData];
