I have a small multiview app. It consists of a UITabBarController with a nav controller in each tab. What I want is to show a UIImageView when a user shakes the device. After I've implemented the loading of the UIImageView, I faced a problem-the image was only 2/3 of the screen because of the tab and nav bars. I managed to hide the nav bar but I'm still stuck with the tab bar. I tried many solutions such as [tabBar setHidden: YES]; but I get errors "tabBar undeclared", although I've imported the AppDelegate, where the tabBar was defined.
Thanks in advance!
Try setting
myViewController.hidesBottomBarWhenPushed = YES;
when you create your UIImageView. When you push it on to the view stack the UITabBar will hide automatically, and it will be restored automatically when you pop or dismiss the controller. No need for the application delegate.
If you want to show a full screen view, it is best to use a modal view controller. This way you do have to worry about hiding/showing navigation items. Take a look at:
http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html
to get started.
Related
I am implementing a facebook integration in my ipad app.I am presenting a veiwController to load facebook URL modally using modalPresentationStyle = UIModalTransitionStyleCrossDissolve. Now I want to implement a navigation bar on the top which will show a title Facebook and a button to close this view.
I tried adding a navigation bar but it didn't show up because my viewController is not tied to any navigationController and tried toolbar as a subview to the viewController's view but it shows up only after the webView is finished loading.
I want to know how should I implement a permanent navigation bar so that I can any time close the modal view.
While the navigation bar doesn't show up automatically, you can always add the navigation bar via IB. I was able to get it working in a sample project. You can take a look and see if it helps you.
Another thing is that you are doing modalPresentationStyle = UIModalTransitionStyleCrossDissolve;. This is incorrect in that you are assigning a transition style to the presentation style property but works because the values are basically enums and UIModalTransitionStyleCrossDissolve ends up with the same value as UIModalPresentationFormSheet.
I'm working on an app that requires a pushing a view that is full screen and shows/hides status, navigation and bottom toolbars on tapping of the central image. The app currently has a UITabBarController that has a UINavigationController for each tab. Basically when the full screen view is displayed I want it to to work like the photos app and animate off the tab bar to show my full screen view.
I'm having trouble making the view take up the full screen if I manually animate out (down) or hide the tabbar.
So, in a nutshell, my question is - what is the view hierarchy of the photos app?
It must have a base navigation controller, that contains a tab bar controller. But does each tab contain another navigation controller? But if so, how to they seem to share the navigation bar with the root navigation controller (look at how the back buttons etc are animated in)?
Is there something really obvious I'm missing?
Thanks for any help.
Have you tried using UIViewController's hidesBottomBarWhenPushed property?
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.
I have created an UITabView application. Each view selected from the bar is a seperate controller with own nib file. I switch between them succesfully.
In the first view I have two buttons (check out the screenshot). When clicking them I want to switch to another views which are the parts of the current view controller. I use:
[self presentModalViewController:anotherViewController animated:NO];
That switches the view, but hides the UITabBar. How to keep the bar on the screen after the switch?
P.S. Sorry for the blurred image. I am not allowed to share to much info.
Well I think you are misusing the modal view controller. For a problem like this I'll say you should put them in a view controller stack using UINavigationController. Instead of making each tab a UIViewController make it a UINavigationController, then you can push and pop view controllers on it, which still show the tab bar.
See http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UINavigationController_Class/Reference/Reference.html
use: tabBarController.selectedViewController = newViewController
edit: UINavigationController is not needed here.