iOS 导航栏隐藏出现的问题

1. 页面1有导航栏push到页面2无导航栏

在页面2设置

- (void)viewWillAppear:(BOOL)animated{

    [super viewWillAppear:animated];

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

    self.navigationItem.hidesBackButton = YES;

}

- (void)viewWillDisappear:(BOOL)animated{

    [super viewWillDisappear:animated];

    [self.navigationController setNavigationBarHidden:NO animated:YES];

}

2. 页面1无导航栏push到页面2有导航栏

在页面2设置

- (void)viewWillAppear:(BOOL)animated{

    [super viewWillAppear:animated];

    [self.navigationController setNavigationBarHidden:NO animated:YES];

    self.navigationItem.hidesBackButton = YES;

}

- (void)viewWillDisappear:(BOOL)animated{

    [super viewWillDisappear:animated];

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

}