iOS UINavigationController 未显示在 ChildView 上

Question

在我的项目中，我在这个 View 中有 loginviewcontroller 我在 viewWillAppear 方法中隐藏了 navigationcontroller如果登录成功，我有以下代码

-(void)gotoCheckinPage{
DashboardViewController *v = [[DashboardViewController alloc]
                            initWithNibName:@"DashboardViewController" bundle:nil];

UINavigationController *navCon = [[UINavigationController alloc]
                                  initWithRootViewController:v];

[navCon.navigationBar setBackgroundImage:[UIImage imageNamed:@"navbar_bg.png"]
                           forBarMetrics:UIBarMetricsDefault];

[self presentViewController:navCon animated:YES completion:nil];
}

但在仪表板 View Controller 中未显示导航 Controller

这就是我在登录 View 中隐藏导航 Controller 的方式

- (void)viewWillAppear:(BOOL)animated {
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}

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

如果我评论这一行:

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

没有问题但是想在loginview中获取hidden navigationcontroller然后在其他view controller中设置为active

有什么帮助吗？

Answer 1

在您的 View 中写下这段代码。您要在其中显示导航

-(void)viewWillAppear:(BOOL)animated{
    self.navigationController.navigationBarHidden = NO;
   }