I'm trying to achieve something similar to user of this post:
Xcode/iOS: How to hide Navigation- AND ToolBar on scroll down?
I'm able to hide (or unhide using NO) the navigation bar successfully using the code:
[[self navigationController] setNavigationBarHidden:YES animated:YES];
However, when I attempt to hide the toolbar using the code:
[[self navigationController] setToolbarHidden:YES animated:YES];
Nothing happens. I then noticed when unhiding the toolbar that I received an additional blue toolbar that I didn't realize existed. This screenshot shows this:
Screenshot
I do not want the blue bar. What I am trying to do is hide or unhide the Black toolbar with the icons on it. (the UITabBar).
I think what I need to do is somehow I need to access the navigation controller of one of the parent view controllers and call the setToolbarHidden on the navigation controller of that view. However, I can't seem to figure out how to do this.
I've tried the following and all seem to have no effect:
[[[self parentViewController] navigationController] setToolbarHidden:YES animated:YES];
or
[[[[[[UIApplication sharedApplication] delegate] window] rootViewController] navigationController] setToolbarHidden:YES animated:YES];
My view controller storyboard consists of the following:
The InitialViewController is a TabBarViewController. It contains three children. One of those children is a UINavigationController. This navigation controller gets several UITableViewController pushed onto it, and eventually a UIViewController is pushed. This last UIViewController is what is seen in the screenshot.
Rough Layout:
TabBarViewController
UIViewController
UITableViewController
UINavigationController
UITableViewController
UITableViewController
UITableViewController
UIViewController
I've tried using
[self parentViewController] parentViewController] parentViewController] ...
to attempt to get back to the top, but this hasn't seemed to work either.
Any suggestions?
I think the problem here might be related to UITabBarController not having a UIToolbar. The setToolbarHidden: method will only apply to the UINavigationController's built-in toolbar (see Apple's documentation). If it's the UITabBarController's tab bar that you actually want to hide, take a look at this post which links to a method using UIView animations directly on the UITabBar.
Related
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];
}
I have a tab bar controller with 4 tabs and each tab is their own UINavigationController, which is how you're supposed to nest tab bar and navigation controller's together. The initial tab is a TableViewController and works/appears the way that it should. From the tableVC I can push standard view controller's onto the navigation controller with:
[self.navigationController pushViewController:VC animated:YES];
and it works properly.
If I attempt to push another TableViewController onto the navigation with the same method it works the same way, but the initial tab bar does not get pushed off screen like it should, it just stays in place.
Why would the tab bar stay on screen even though I am pushing a new VC onto the navigation?
I have tested with multiple instances of different TableVC's and it only happens with a table view controller.
Here is the code I'm using:
- (void)pushTableVC
{
TestTableVC *tableVC = [[TestTableVC alloc] init];
[self.navigationController pushViewController:tableVC animated:YES];
}
This will push the new table view onto the stack, but the tab bar from the parent VC stays in place and does not get pushed off screen like it should.
You should call the method setHidesBottomBarWhenPushed: on the view controller you are pushing to correctly hide the tab bar.
UIViewController *viewController = [[UIViewController alloc] init];
[viewController setHidesBottomBarWhenPushed:YES];
[[self navigationController] pushViewController:viewController animated:YES];
When you use a UITabBarController, the tab bar always stays on screen, even as you push additional view controllers onto an embedded UINavigationController. You will see this in any app that has a UITabBarController implemented, unless they implement custom behavior to change this.
The UINavigationController contains everything above the UITabBar, but does not contain the UITabBar itself, so it would not be able to push it offscreen.
I am using UINavigationController to direct some view controllers.In some view controller, I don't want to use UINavigationBar, but in some others i may use. Now I am try to pop one view controller using UINavigationBar to its previous one which hide UINavigationBar. But when poped, there is one wired black space under screen. After you rotate the screen, the space will disappear.
the normal view controller A should be like this:
when press the text button, a view controller B will be pushed, which is as followings:
when click back button on the navigation bar. A will come out.but there is a black space at the bottom.
If rotate the screen, the space will disappear. And also in A's - (void)viewWillAppear:(BOOL)animated method i hide the navigationbar and let the screen autorotate.
- (void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
[self willAnimateRotationToInterfaceOrientation:[UIApplication sharedApplication].statusBarOrientation duration:0];
}
whats wrong with this situation? Any help will be appreciated.
I add setNavigationBarHidden: method in the back button action method. it works. If i add this method in viewWillDisappear: method or others, it seems it doesn't work. The navigation bar will have effect on next appear view controller. which means, there will be a black space in the next view controller in the navigation stack.
Finally, i add a action method for the back button and setNavigationBarHidden:YES in the method, which is as follows:
- (void)backBtnClicked:(id)sender
{
[self.navigationController popViewControllerAnimated:NO];
[self.navigationController setNavigationBarHidden:YES];
}
Here's the deal... I can't get the UINavigation bar to appear on one of my views. I have the whole thing in a NavigationViewController in IB and turned of the navigation bar though IB because I don't want it in most of my app but when I try to show the navigation bar via code, it doesn't show up.
here's the code I used to try to get the nav bar to show up... but didn't work:
[self.navigationController setNavigationBarHidden:NO animated:YES];
[self.navigationController setNavigationBarHidden:NO];
self.navigationController.navigationBarHidden = NO;
self.navigationController.navigationBar.hidden = NO;
Any help will be greatly appreciated
respectfully,
Matt
The code you write should only work inside of one of UINavigationController's controllers, not views.
So, if you call it from your view, you should replace self with controller name,in which this view is placed.
I have a ViewController which I'm using a modal transition for. It has a toolbar and I've added five items (including space) in interface builder. I'm trying to set the buttons from code, so when the table view in this modal ViewController is being edited, show a 'lock' button, when it's not editing, show an 'unlock' button.
Despite my attempts, the buttons aren't changing.
I've tried (updated 13th Jan):
[self setToolbarItems:...animated:true]; // failed
[self.navigationItem setLeftBarButtonItems:... animated:true]; // also failed, though self.navigationItem is not null
[self.parentViewController setToolbarItems:... animated:true];
[self.navigationController setToolbarItems:... animated:true];
[self.tabBarController setToolbarItems:... animated:true];
[self.navigationItem setLeftBarButtonItems:... animated:true];
[self.navigationController.toolbar setItems:
All of which failed.
This ViewController is shown from another VC (non modal), which is pushed onto a NavigationController.
Am I going about this wrong?
Rather than changing the buttons in the toolbar, I eventually just added a button in Interface Builder and changed the background image:
btnLock.image = [UIImage imageNamed:#"lock_open_white_30.png"];
If you really did need to change the buttons, you'd probably need to create all the buttons and expose them on your ViewController, the use setHidden to hide/show them.