My application is embedded within a UITabBarController and has 4 tabs. 3 of the 4 tabs are embedded within UINavigationControllers and the other is not.
I have found if the ViewController has a NavigationBar and the I am using present view controller modally when segueing, and the presenting controller has define contextselected the modal view appears underneath both the NavigationBar and UITabBar. If define contextis not selected then the modal view is displayed above the UINavigationBar but still underneath the UITabBar. Like So,
The problem here is that because the Modal View Controller is presented underneath the UITabBar the user can still access the UITabBar and change tabs before dismissing which results in a black screen.
However if the presenting view controller has not got a UINavigationBar and has not got define context selected then the modal view controller will take up the whole view and is displayed above the UITabBar. This means the user cannot switch tabs before dismissing the modal view. Which is the intended effect I am after, however how can I achieve this when using a UINavigationBar so the user cannot switch tabs ?
If you've created your segue in a storyboard, select the segue to the modal you want to be presented over everything, and set the Presentation attribute to Over Full Screen:
If you're presenting the modal programmatically, assuming you named your view to present yourModal set the modalPresentationStyle as such:
yourModal.modalPresentationStyle = .OverFullScreen
Related
Back when I first created the foundational layout for the app I'm currently working on in Storyboard, I did it in two steps:
Selected my View Controller and used Editor->Embed In->Navigation Controller.
Selected my View Controller again and used Editor->Embed In->Tab Bar Controller.
This was the resulting layout:
Question 1: Why do these steps create such an odd layout?
In this weird layout that seems to imply that the Navigation Controller is attached to the Tab Bar Controller as its parent, the only way I can get navigation items to display in the app (in the view controlled by the View Controller on the right) is by placing them in the nav bar of the Tab Bar Controller scene.
However, this creates various issues, including not being able to create an IBOutlet in my View Controller file for a custom view I drag into the title view slot in the Tab Bar Controller scene. Meanwhile, dragging anything into the navigation bar in the View Controller scene just makes it not appear in the app when it runs.
Question 2: How can I fix this layout so that I can control-drag from navigation items into my View Controller file? Or is everything actually correct, and I'm just trying to force something I shouldn't? (My intention here is to be able to set the custom title view's text in my View Controller code.)
Its obvious, if you want to embed MyViewController to NavigationController then you need to change your second step and need to embed NavigationController to Tab Bar Controller.
Selected MyViewController and used Editor->Embed In->Navigation Controller.
Selected NavigationController Embed with MyViewController and used Editor->Embed In->Tab Bar Controller.
It should look like this.
Note: You need to embed MyViewController to navigationController only if you want to perform push operation on this TabBarItem means with MyViewController other wise simply embed MyViewController to TabBarController no need to embed it with NavigationController.
I'm trying to display the navigation bar at the top of the screen, but it's not showing in embed navigation controller.
Here is how it is in the storyboard:
And here it's in the simulator:
As you can see, I created a custom TabBar (following this tutorial) at the bottom of the screen so I can navigate between the different views.
I believe that I'm going to have to load the navbar programatically because the only solution that I found was to set the navigation controller as the initial view controller, but I already set another view as the initial one so I can't do that.
Issue :
When you instantiate a viewController using storyBoard identifier they wont come with free embedded navigation controller, even if you have added a NavigationController to them. As a result you are adding a viewController without navigation bar to your tab bar VC.
Solutions:
Solution1: If you want each child viewControllers to carry their own navigation controller hence their own navigation stack, provide a storyboard identifier to Navigation Controller behind your child viewControllers and instantiate the Navigation controller itself rather than ViewController. And add NavigationController as you tab bar looking VC's child. Because navigation controller loads the embdedded VC by default you will see your child VC with nav bar.
Solution2: All that you care for is only nav bar than add the Navigation Controller behind the VC containing tab bar looking View.
Hope it helps
Have you tried constraining the navigation bar to your view? Otherwise it can move offscreen.
You need to point the tab bar controller segue to the navigation controller of your view - otherwise if you point the segue straight to the view you're just loading the view without any navigation controller attached.
I have a modal view controller whose navigation controller's bar style is "UIStatusBarStyleBlack", so its status bar text color is white.
However, if I present a UINavigationController modally from here and I want it to be have a bar style of "UIStatusBarStyleDefault", I can't control the status bar text color.
I've tried everything suggested on SO (subclass, extensions, etc), but none of the solutions take this scenario into account (modal on a modal).
EDIT: This seems to only be the issue whenever it is presented from a non-fullscreen modal. So, if the first modal was fullscreen, everything works. But if it was a form sheet or popover on iPad, then the modal presented from there won't update the status bar color.
I think the problem is that you are presenting your view controller instead of a navigation controller.
First you need to create a navigation controller with root view controller as your view controller and then present that navigation controller.
If this is not the case then kindly post some code which shows how exactly you are currently approaching the case.
When a user taps on a UITabBar item, I would like to present a view controller modally, but I would also like the UITabBar to remain visible. When the user is finished with the modal view controller I want to dismiss it modally. Basically, I want to show one view controller on top of another and dismiss the top view controller with a modal animation, while keeping the UITabBar visible. I am thinking I have to do some sort of custom animation, but I cannot figure out how to make that work.
Anyone know how to do this for iOS 6 and iOS 7?
Modal segues coverup the previous navigation controller stack, so any existing tab, navigation, and tool bar controllers will no longer accessible. You'll either need to use a push segue to retain the existing tab bar, or add a new tab bar controller to the modal view.
In my storyboard I have a view with a segue into a new view that's embedded into a Navigation Controller (so the segue points to the navigation controller). I have the segue set to a Modal transition, however when the new view is animating up, it contains the standard blue navigation bar above the view (which then animates out of view).
Here's what it looks like mid segue: http://i.imgur.com/3eqAQ.png
How do I make it so the modal view animates up but without the navigation bar?
I have tried hiding the navigation bar in the embedded view's init, viewWillAppear, and vieWillLoad methods and that doesn't work.
I event went so far as to create a custom subclass of UINavigationController and set the navigation controller in the storyboard to it.
Thanks!
This may sound pretty simple, but have you tried hiding the navigation bar immediately before the modal segue starts? I had this problem when presenting a modal view controller and adding a [self.navigationController setNavigationBarHidden:YES] immediately before the presentation did the trick for me.
I had almost the same problem, but I wanted to get a navigation bar for my modal transition, as it was always hidden.
There may be two ways for you to remove the navigation bar:
Make sure that your view controller is not embed in a navigation controller, as it would put one by default
Check the "Top Bar" attribute of your previous controller in the workflow and work with none/inferred values depending on your storyboard.
Regards