NavigationController popToViewController报错解决方案

报错信息如下：

Assertion failure in -[UINavigationController popToViewController:transition:], /SourceCache/UIKit_Sim/UIKit-1912.3/UINavigationController.m:2229

解决方案为：

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES];