关于导航栏隐藏，到下级页面不隐藏的方法

@interface HomeViewController ()@end

@implementation HomeViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor redColor];

// 设置导航控制器的代理为self

self.navigationController.delegate = self;

}

#pragma mark - UINavigationControllerDelegate

// 将要显示控制器

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

// 判断要显示的控制器是否是自己

BOOL isShowHomePage = [viewController isKindOfClass:[self class]];

[self.navigationController setNavigationBarHidden:isShowHomePage animated:YES];

}

分为三步：

1.申明delegate

2.设置代理是自己

3.实现代理