UITabBar disappears when NavigationController pop the view back to the said ViewController - ios

I have a UITabBar on a UIViewController, attached from the Interface Builder, which is working fine, until I have a button that pushes another ViewController to the screen (ex: Login screen) via NavigationController.
After the other ViewController is popped, the screen returned to the original ViewController, but the TabBar is disappeared. How can I fix this? Thanks.

-(void)viewWillAppear:(BOOL)animated{
[self.tabBarController.tabBar setHidden:NO];
}
use This in popped controller

Related

segue to the TabbarController

In my image, my first Tabbar is HomeViewController and the second Tabbar is CameraViewController.
What is the proper way to segue to the Tabbarcontroller? You can see the read line, I try to segue this but I
always get the back button in my HomeViewController and It display weird like not showing the navigation name.
In CameraViewController I hide the Tabbar for the use camera button. I try to use segue programmatically like this one.
[self performSegueWithIdentifier:#"sample" sender:sender]
but It doesn't work properly. Is this possible to segue to TabbarController?
You can't call
[self performSegueWithIdentifier:#"sample" sender:sender]
Because you're in TabBarController already. You could implement custom flow. By pressing "Back" button - just show TabBar and change selected tabBarItem for example…
update
used this
[self.tabBarController setSelectedIndex:0];

Navigation bar shows wrong navigation item in iOS 9.2

A UINavigationController's navigationBar will initially show the correct UINavigationItem, but then will revert to the previous UINavigationItem every time a UIViewController is pushed onto the stack.
Steps to Reproduce:
Push a UIViewController onto a UINavigationController stack
Set navigationBarHidden = YES on the navigation controller
Push another view controller onto the navigation stack.
Begin an interactive pop transition and then cancel it.
Pop back to the previous view controller
Set navigationBarHidden = NO on the navigation controller
Attempt to push a view controller onto the stack
Looks like -[UINavigationBar _cancelInteractiveTransition] is getting called, even on push transitions after getting into this state? I can set a breakpoint on that symbol, and the navigation bar shows the correct navigation item before it and the wrong navigation item afterwards.
But what I want is that the navigation controller's navigation bar should display the current topViewController's navigation item.
#interface UINavigationController (Private)
- (void)_cancelInteractiveTransition:(float)arg1 transitionContext:(id)arg2;
#end
- (void)_cancelInteractiveTransition:(float)arg1 transitionContext:(id)arg2
{
BOOL hidden = self.isNavigationBarHidden;
if (hidden) {
[self setNavigationBarHidden:NO animated:YES];
}
[super _cancelInteractiveTransition:arg1 transitionContext:arg2];
if (hidden) {
[self setNavigationBarHidden:hidden animated:YES];
}
}
I recently ran into this issue on iOS10 and I'm sure it was there on iOS9, assuming we still supported it. It turned out that the issue was that at the start of the interactive transition we were setting navigationController.navigationBarHidden=NO and then when it was cancelled forgetting to set it back to navigationController.navigationBarHidden=YES. It seems like the navigation bar doesn't like to be unhidden twice in a row. I would imagine that its the same for setting it to hidden twice in a row as well. The good news is that this was not an issue with iOS11.

popViewController not working with storyboards

I create a UINavigationController (as a initial screen) and connect them with my UITableViewController (as a root).
Next, I create another UINavigationController and connect with my UIViewController. Inside my UITableViewController I connect my first cell with UINavigationController (That was connected with my UIViewController) (Segue -> show).
When I run the project my table appears, when I select my first row, my UIViewController appears. Thats great!
When I was in my UIViewController the back bar button doesn't appears, in my case I create a left bar button, that will run a function to dismiss that view and go back to my UITableViewController, for that I use many codes:
-(void)back{
NSLog(#"Called");
[self.parentViewController.navigationController popViewControllerAnimated:YES];
}
-(void)back{
NSLog(#"Called");
[self.navigationController popViewControllerAnimated:YES];
}
-(void)back{
NSLog(#"Called");
[self.navigationController popViewControllerAnimated:YES];
}
But all of they doesn't works and my view don't dismiss, how can I solve this problem?
The problem is that your navigation controller, that you call from your table view cell, has only a single view controller (yours) on its navigation stack. So it cannot pop anything from this stack, else the stack were empty.
What you have to do instead is to dismiss the navigation controller itself.
I think that the solution would be to remove the second navigation controller. Since the TableView is already embedded inside a Navigation Controller, the show segue to the UIViewController must be directly connected to it.

uitabbar loads after uiviewcontroller

In a UITabBar based application, UIImagePickerController is opened ,after dismissing it UIViewController loads earlier than UITabBar and as a result whole content of UIViewController is not being shown?
I guess after dismissing controller method for navigation would be an issue.
Check if you use below method:
[self.navigationController popToRootViewControllerAnimated:YES];
Then it will navigate flow to root controller.
So replace this method with
[self.navigationController popViewControllerAnimated:YES];
Above method pop back to previous controller.

ModalView on the top of UITabBarController during app launch

I'm a bit lost trying to figure it out...
I have a tab bar based app with login screen at the start. Login screen should be done as Modal View Controller BEFORE tab bar controller appears.
The problem is that I can present it only in viewDidAppear: method of TabBarController. And user can see for half a second content of the UITabBarController. I've tried to move call to viewDidLoad: or viewWillAppear: but it logs an error in console: "whose view is not in the window hierarchy!". As far as I can understand you can only add ModalViewController when all child UIViewControllers of UITabBarController are loaded, ad that happens in viewDidAppear: delegate method.
Do you have any solution how to show login screen without showing TabBarController before?
I've tried 2 ways of displaying ModalViewController, both of them work in viewDidAppear: only
XIB file with login view and using presentViewController: code
self.loginController = [[LoginViewController alloc] init];
[self presentViewController:self.loginController animated:NO completion:nil];
Storyboard, modal segue and calling it from the code:
[self performSegueWithIdentifier:#"loginScreen" sender:self];
Instead of a modal, you might consider pushing the login screen onto a navigation stack. Inside viewWillAppear: you can just instantiate your login viewController and push it. You could also do it in viewDidLoad if you'd like.
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[self.navigationController pushViewController:yourInstantiatedLoginViewController animated:NO];
}

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