navigationController 跳转到指定页面

返回根页面用 ：

[self.navigationController popToRootViewController］

返回指定的某个vc用下面 

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