iOS UINavigationController未顯示在ChildView上

Question

在我的項目中，我在該視圖中具有loginviewcontroller，如果登錄成功，則在viewWillAppear方法中隱藏了navigationcontroller，我具有以下代碼

-(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];
}

但在儀表板視圖控制器中未顯示導航控制器

這就是我在loginview中隱藏navigationcontroller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];
}

如果我評論這一行：

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

沒問題，但是想要在loginview中獲取隱藏的navigationcontroller，然后在其他視圖控制器中將其設置為active

有什么幫助嗎？

Answer 1

寫下您認為的代碼。 您要在其中顯示導航

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

Answer 2

您可以將其簡單地添加到您的LoginViewController中：

-(void)viewWillAppear:(BOOL)animated
{
    self.navigationController.navigationBarHidden = YES; // Where you want to hide it.
}

在DashboardViewController中：

-(void)viewWillAppear:(BOOL)animated
{
    self.navigationController.navigationBarHidden = NO; // Where you want to show it.
}