iOS之导航返回上上个控制器或指定返回某个控制器

方式一，不推荐

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];

方式二，推荐

for (UIViewController *controller in self.navigationController.viewControllers) 

{    if ([controller isKindOfClass:[你要跳转到的Controller class]]) {        [self.navigationControllerpopToViewController:controller animated:YES];   

 }}

方式三，推荐  这种方式可以适合返回指定控制器并调用其方法（比如刷新）

// 返回调用的控制器 

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];