pushViewController多次跳转返回到最上层方法

//pushViewController 多次跳转返回到最上层方法 返回根页面vc用 :
[self.navigationController popToRootViewController animated:YES];
//返回指定的某个vc用下面(通过index定位)
[self.navigationController popToViewController: [self.navigationController.viewControllers objectAtIndex:2] animated:YES];
//或(通过class定位)
for (UIViewController *controller in self.navigationController.viewControllers) {
    if ([controller isKindOfClass:[你要跳转到的Controller class]]) {
    [self.navigationController popToViewController:controller animated:YES]; }
}