Question

在我的项目中，我在此视图中有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];
}

但在仪表板视图控制器导航控制器中未显示

这就是我在loginview中隐藏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];
}

如果我评论该行：

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

没有问题，但希望在loginview中获取隐藏的navigationcontroller，然后在其他视图控制器中设置为活动

任何帮助？

Answer 1

在您的视图中记下此代码。您要在其中显示导航

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

Answer 2

您只需在LoginViewController中添加它：

-(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.
}

iOS上未显示iOS UINavigationController

2 个答案: