第一种做法：

- (void)viewWillAppear:(BOOL)animated {    [super viewWillAppear:animated];    [self.navigationController setNavigationBarHidden:YES animated:YES];}- (void)viewWillDisappear:(BOOL)animated {    [super viewWillDisappear:animated];    [self.navigationController setNavigationBarHidden:NO animated:YES];}

第二种做法：

@interface WLHomePageController () 
    
     @end@implementation WLHomePageController #pragma mark - lifeCycle- (void)viewDidLoad {    [super viewDidLoad];    // 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];}