I recently started using interface builder, the problem i'm facing right now is when i use the back button of navigation controller, my UI elements' y axis go up by roughly 20-30 px, is there some setting i've to use to avoid this problem ? And they go up only when i use pushViewController, when i use popViewController it loads the way i need.
Code i'm using for pushing:
examVC=[[ExampleClass alloc] initWithNibName:#"ExampleClass" bundle:nil];
[[self navigationController] pushViewController:examVC animated:YES];
I'm attaching the images with the question. Please note how label has gone down about 20-30 px.
Why does this happen? What am i doing wrong ?
Thanks for all the help.
Edit : changed the screens for better clarity
I'm using pushing code on the round rect button.
Screen 1:UI elements set in my IB
Screen 2: How it looks when pushed from previous view
Screen 3: How it looks when popped from the "Next View"
My home view controller had the navigation bar hidden, the screen i posted was the second view which comes after the home view. I wanted to hide navigation bar in the first view only, so i had used :
- (void)viewDidDisappear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:NO animated:animated];
[super viewDidDisappear:animated];
}
It caused the problem because i was showing the navigation bar again in viewDidDisappear, so the view would load first then the navigation bar would be shown causing it to overlap.
So i put the same code in viewWillDisappear, which removed the issue. As navigation bar did load before loading of the next view. Now the view loads just like i designed it in interface builder.
Hey I don't know whether it will work for you or not but in your IB change top bar None to Navigation Bar
Then adjust your element accordingly and tun the code.
I tried all of the suggestions here and none of them worked. My UI elements were always lower when popping back to my original view controller. The only thing that fixed this for me was going into my nib file in Interface Builder and turning off Auto Layout.
Related
So before I push a new viewController onto the stack in a certain view, I set the navigationBar to hidden I notice that it disappears before the next screen gets pushed and the slide animation happens (because I need a UIToolbar at the top).
So question #1: is there a way to push a new view controller and setting the navigationbar to hidden, and not getting the hide animation until after the new view controller is on screen. it looks funny that the navigation bar hides then pushes the new view controller.
Once the new view controller is present, when I pop it off, I set the navigation bar back
[self.navigationController.navigationBar setHidden:NO];
But when it is popped, the navigationbar is not back any more. Is it because this navigationBar is for the current navigationController and not the new one that is being presented after the pop? (question #2)
Question 3: Realizing it isn't showing my navigationBar, in the viewController that gets presented after the pop, in its viewDidAppear, I added
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.navigationController.navigationBar setHidden:NO];
}
which shows the navigationBar, but the view size is incorrect since it seems like once the navigation bar was hidden, the rest of the view took up the empty space, and then the navigationBar is on top of the content. Is there anything I can do about this? Or am I approaching it incorrectly with push and pop?(question #3).
Thanks!
I was running into the very same problem (only in reverse: I was starting from a NavigationBar being hidden and pushing a view where I wanted the NavigationBar visible), and there's actually an extremely easy fix.
Simply replace your calls:
[self.navigationController.navigationBar setHidden:NO];
with
[[self navigationController] setNavigationBarHidden:NO animated:YES];
In my code, I call these statements in the - (void)viewWillAppear:(BOOL)animated methods of each respective View Controller.
I just tried this solution in the order you are using (visible, then hidden), and it seems to work just as well.
Interesting issue. You could try changing the hidden property in viewWillAppear and viewWillDisappear, but it seems like that might not give the desired results either.
Can you present the view controller modally instead of making the navigation bar disappear? If it's the last view controller on the stack, that would be possible. It might also make more sense to the user to see a view controller presented differently. This might indicate to the user that navigating away from this view controller is no longer done with the Back Button. It could be more reasonable than having the navigation bar just disappear.
If you still wanted the view controller to slide in from the right, I don't think it can be done with a modal view controller. But, you could do that by animating a view that fills the screen. (You just add the view with a frame that has origin.x equal to the width of the screen. Then, in the animation, you change origin.x to 0.0. Let me know if you need more detail on this.)
However, I would recommend presenting the view controller in a different manner from the way a view is generally presented by a navigation controller. Because, essentially, you are no longer letting the user navigate away from this view as he/she generally would from within a navigation controller. (So, my response to question #3 would be 'yes'.)
I have a Navigation controller in a storyboard, currently with two screens. Screen1 contains an opening logo and some buttons, and I have hidden the navigation bar at the top using:
[[self navigationController] setNavigationBarHidden:YES];
in viewDidLoad and viewWillAppear: (in viewWillAppear I have it set with animated:YES, so it slides off when coming back from other screens).
When I go to Screen2, I have:
[[self navigationController] setNavigationBarHidden:NO animated:YES];
in the first view controller's viewWillDisappear, and the navigation bar slides in all nicely when that view comes on to the top of the navigation stack.
Problem is, when I tap back, the navigation bar animates off the right side of the screen, but Screen2 stays there, revealing another navigation bar underneath!
I can then tap back again and it will push Screen2 off and the main screen shall return, but this is not behaviour I want to pass on to any users, obviously!
Anyone had this issue before, or have any points on what might be the culprit?
Edit: I just found an error appearing when I run the iOS Simulator:
2011-11-02 19:29:13.548 TestHTML5[10261:f803] Unbalanced calls to begin/end appearance transitions for <LessonViewController: 0x6c5e960>.
This happens when I click the button to go the the second view (LessonViewController).
Hopefully that might be the thing to crack this, anyone know?
I found my IBActions, which contained:
SecondViewController *X = [self.storyboard instantiateViewControllerWithIdentifier:#"X"];
[self.navigationController pushViewController:X animated:NO];
on each were causing the view to double up or something like that. When I commented these two lines out in each IBAction, the problem disappeared.
Thanks heaps to #CodaFi for helping me through possibilities for this, to be honest, this solution doesn't make sense to me, even thought I can see it working here.
I'm writing my first iPhone app and I am trying to figure out how to have a MasterView and DetailsView like in the example. However, instead of using a TableView, I want to use a button on the MasterView to go to the SignUpView. I want the MasterView to NOT have a navigation bar but the SignUpView needs to have one.
I have tried putting a NavigationController into the MasterView using the interface builder. This doesn't seem to do anything at all ... I.e. I make the following call:
[self.navigationController pushViewController:signUpViewController animated:YES];
And nothing happens. The SignUpView is never shown.
So then I declared a NavigationController in the AppDelegate. The above call in the same function that it was in before (button handler, button is in MasterView) works now! It takes me to the SignUpViewController.
however, the issue is, when I press back on the navigation bar in the sign up view, the navigation bar shows up again in the MasterView. I tried to set
self.navigationController.navigationBarHidden = YES;
in viewDidLoad and viewDidAppear, but that causes a black bar to appear in the transition from SignUpView to MasterView.
I tried to not set it in one of the two, and that causes the animation to go smoothly, but the navigation bar shows up in the MasterView.
I feel like this should be pretty simple to do ... but I'm at my wits end trying to figure this out. Some help would be really appreciated!
Thanks.
Probably not the answer to your question, but just a small suggestion. In the many apps that I have come across, a sign-up/sign-in view is generally displayed as a modal view (on top of your master view) with a 'cross' in the top-right corner to dismiss it. Probably it results in a better user experience.
Also, did you try self.navigationController.navigationBarHidden = YES; in the MasterView's viewWillAppear ?
HTH,
Akshay
I had this problem too, until I discovered setNavigationBarHidden. You will probably want to use these in viewWillAppear/viewWillDisappear or viewDidAppear/viewDidDisappear. You don't want to call this in viewDidLoad because that is only called once when the view is initialized, not every time it appears.
To hide:
[self.navigationController setNavigationBarHidden:YES animated:YES];
To show:
[self.navigationController setNavigationBarHidden:NO animated:YES];
I'm writing an iPhone app that is based on a UINavigationController. I'm pulling data from a server that sometime returns bogus links. I open each link by pushing a webview viewcontroller. I want to be able to include some error handling. I know if the link is no good. So I want to be able to pop the webview view controller as soon as I know that my webview has encountered an error.
Currently, I've tried using the following code:
[self.navigationController popViewControllerAnimated:YES];
I then get a Navigation bar with nothing displayed in it, but if I click where the "back" button should be it operates appropriately. The title pops up when I click where the "back" button should be. The view where the viewcontrollers usually display there content is blank white too even though I'm popping back to a UITableViewController.
I've tried this as a workaround:
UINavigationController *nav = self.navigationController;
[self.navigationController popViewControllerAnimated:YES];
[nav.visibleViewController.view setNeedsDisplay];
I've checked the viewControllers array in the UINavigationController and it has the right viewcontrollers in it (ie it has removed the viewcontroller for the webview).
I also tried putting code in the viewWillAppear of the viewcontroller I'm popping back to, but the method is never getting called.
I'm looking for a way to force the UINavigationController to reload the same way that you can call reloadData on a UITableView.
Any help would be greatly appreciated.
I saw something like this on my app where I was using a navigation bar I added in Interface Builder on the root view of a navigation controller and then programmatically creating the nav bar and its subviews for the second view. When I would pop the second view to return to the first view I would hide the self.navigationcontroller bar which would show the white space underneath until the IB nav bar of the previous view appeared. To fix this I decided to stick with programmatically creating all my navbars which fixed the issue for me.
TL;DR - if you are using both IB and programmatically made navbars this can happen when popping views, stick with one or the other for all the navbars yo
I am creating a navigation base application. I need to display a tab bar too.
My mainWindow.xib contains:
UINavigationController,
UITabBarController.
UITabBarController has three UINavigationController with it.
On a condition-based algorithm, I am displaying the Navigation and the TabBar.
It's working well. The problem occurs when I want to move any inner view of TabBar: it shows navigationBar there (what I need) but it shows TabBar too. I want to remove the TabBar of all inner view. When I hide the tabbar it still occupy its space at the bottom of view. I had tried to reset frame of View and Window but nothing helped.
How can I hide tabBar and use its space in my view?
Is the logic I am using correct or not? If not, please tell how to correct it. If there is a tutorial it would be better.
You can try this:
yourInnerViewController.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:yourInnerViewController animated:YES];
The answer is that you can't and trying to force it will break apple's HIG and they'll most probably reject your app.
The way I got around it was to use [self presentModalViewController:animated:] instead of [self.navigationController pushViewController:animated:].
I know its annoying, but a tab bar controller is there to switch between sections of your app. Therefore it provides functionality outside of the context of the navigation controllers within it and therefore cannot be hidden (properly) from inside one of those navigation controllers.