iOS 优雅地隐藏导航栏NavigationBar (Objc)

@interface FSViewController () <UINavigationControllerDelegate>

@end

@implementation FSViewController

#pragma mark - lifeCycle
- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 设置导航控制器的代理为self
    self.navigationController.delegate = self;
}


// 将要显示控制器
#pragma mark - UINavigationControllerDelegate
- (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 isSelf = [viewController isKindOfClass:[self class]];
    [self.navigationController setNavigationBarHidden:isSelf animated:YES];
}