I know it's possible to set a background image for the UINavigationBar, but I would like to know if there is a way to share a common background view for all controllers in a UINavigationController. The idea is to have a UIImageView as the background that stays in place rather than "sliding" over itself when navigating to a new controller.
A navigation controller is a kind of view controller and it hosts the currently visible view controller by adding the VC view to its view. You can add things to that view too. Create your image view and add it as a subview of the nav controller view, then send it to the back (or insert at index 0).
Related
How to reposition the UINavigationBar in iOS? I need to have a sticky UI component on top of it so that it is persistent while the user going from the home page to the subpages?
When you use a UINavigationViewController, the navigation created internally, and is positioned at the top. There isn't much you can do about it from within the view controller's in it's navigation stack.
However, navigation view controller, is just a view controller, and you can add it's view in another view, or embed it within a container view :
Now, you can have any custom content above (or around) your navigation controller
Further reading:
Creating a Custom Container View Controller
Implementing a Container View Controller
I have a navigation controller with its root view controller, I need to add a fixed/ sticky view at the top of the root view controller, so that only the content below it navigates whenever I use pushViewController or popViewController, is that possible?
Look at the image below, I want the red area to be fixed/sticky a.k.a doesn't navigate or move when I push or pop, only the blue area to navigate
P.S: The containerView won't work here as it acts as normal view, and adds its sub view controller's view to it.
Add a container View to add as child view controller for your navigation and set navigationBar as hidden. Now you can add the above view with 44 height as a sticky one for all View controllers.
If you want a way to communicate between child view controllers under navagtion with the parent I would suggest NSNotification observer or a Delegation to be confirmed by all child VC or by a subclass of UINavigationController.
This is a sytematic way.
Other dummy way is to add a view to the window and set the view.layer.zPosition if you want it below or above any other view.
you can use Container View and show/hide other views
I would like to have custom view set in one screen and have it across all view controllers in my application.
I find solution with using Container view. So I create RootViewController and I give it Container view and set my original MainViewController as embed in container. I added view to RootViewController and in first view controller (MainViewController) it looks good.
The problem is when I go to another view controller by Push segue. New view controllers covers whole screen (which is okay) and covers custom view too. I was thinking that it could help if I add Navigation Controller with root MainViewController and this navigation controller would be embed in RootViewController but the result is same. I set Navigation bar as hidden (same for status bar) because I want to be hidden.
So where could be problem? Or how would you add custom view to all screens? This custom view should work as global (I am using NSTimer and counting time) so I solution with inheritance isn't for me.
You can use application window and add this custom view as subview whenever required. I have used it in one of my app to show notifications (if there area any) and it works great.
Get handle to Application Window and add subview to it. Custom view can be created from a singleton class or App delegate.
You could try it the other way round. Make a view which will never change inside your root view controller and a container view and just change the content of the container view depending what u want to display next to your unchanging view.
In my app I want to add a view much like the status bar, always onscreen at the top of each of my view controllers, displaying application wide data.
I really have no clue how I might achieve this so any suggestions would be really helpful. I;m sure someone must have chased this idea at some point?
Thanks.
What you're willing to do is fairly straightforward since iOS 5 using view controller containment, it allows you to embed child view controllers in a parent view controller.
In your case I would create a custom container view controller with two subviews: the content view and the statusbar-like view. The content view should display your current root view controller by adding it as a child view controller to your container view controller and adding its view as a subview to the content view. The statusbar-like view can then be used to display information that will be visible everywhere in your app.
You might want to read this documentation for further details:
Creating Custom Container View Controllers
You can create your custom view and add it as a subview to your keyWindow. This way it will always be visible. Another option is if you have tab bar controller or a navigation controller as your root view controller, then you can add that view as a subview to their respective view and it will always be visible.
In my app, i have a main view controller which sometimes brings a modal view on top of it. This modal view is a UINavigationController with a navigation bar. I want to display an image above the navigation bar, and have the navigation bar appear below the image.
I do not want to subclass anything and the app uses autolayout, i do not want a bunch of delegate callbacks and frame calculations. The view inside the navigation controller (the actual modal content) must still respond to different screen sizes correctly, such as rotation, call status bar etc. Also, no IB solutions please, these views are all managed in code.
How do i accomplish this?
I would turn off AutoLayout and place the image at the top
I don't think you can do it with your modal view being a navigation controller. I would do it by making that modal controller a UIViewController that you set up as a custom container controller. You can add an image view to the top of this controller's view and add the view of a child view controller (which would be a navigation controller) to the bottom. This would be a lot easier to do in a storyboard using container views, but it certainly can be done in code.