（推薦下面這種，不受控制器數量影響）

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

if ([controller isKindOfClass:[Controller class]]) {

[self.navigationController ?popToViewController:controller animated:YES];

}

}

方式三，推薦? 這種方式適合返回指定控制器并調用其方法（比如刷新什么的）// 需要返回調用的

MylanController *myIVC = nil;

for (int i = 0; i < self.navigationController.viewControllers.count; i++) {

CustomViewController *cv = self.navigationController.viewControllers[i];

if ([cv isKindOfClass:[MylanController class]]) {

myIVC = (MylanController *)cv;

break;

}}

[self.navigationController? popToViewController:myIVC animated:YES];

[myIVC refreshTableView];