ios开发navigationController pushViewController 方式多次跳转返回到最上层返回到指定的某一层的实现方法

[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];
}
}