UINavigationController返回前面界面的几种方法

//出栈

//1.返回上一页

//[self.navigationController popViewControllerAnimated:YES];

//2.返回首页

//[self.navigationController popToRootViewControllerAnimated:YES];

//3.返回viewController中的任何一页

//获取第二个viewController

UIViewController *vc = [self.navigationController.viewControllers
objectAtIndex:1];

[self.navigationController
popToViewController:vc animated:YES];