I have a little problem related to implementing a tabBar with navigation controllers, when I have two views before the tabBar controller, which also uses a navigation controller.
This is my setup:
Have my separate navigation controller(with two view controllers) be the rootViewController of your window until the user move to tabBar view. Then change it to be the UITabBarController (which does not include the previous view controllers). I do this in my second controller file.
When I tried to flip some view controller which is on tabBar, its showing previous controller view in background while flipping.
Related
I don't understand why SignIn and SignUp navigation Bar and the back buttons are not visible even when embedding both of these views in the navigation controllers.
Is there anything else we have to do in code. All top bars are inferred in this case and I haven't touched the visibility of any.
There is no back button because there is nowhere to go back to. Your sign up and sign in view controllers are the root view controllers of their respective navigation controllers.
There is no visible title because what you are looking at is the navigation item of the tab bar controller, which has no title.
Your architecture posits a navigation controller insider a navigation controller, which is illegal:
nav controller -> tab bar controller -> nav controller
You can't do that.
Also you can't put a tab bar controller inside a navigation controller. A navigation interface inside a tabbed interface is fine (as illustrate in Apple's own docs: https://developer.apple.com/documentation/uikit/uinavigationcontroller). The reverse, a tabbed interface inside a navigation interface, is not.
The simplest solution is to eliminate the first navigation controller completely, as there is no need for it (you are not pushing anything onto it beyond its root view controller).
IN SIMPLE TERMS
Logically, your Tabbar should not be embedded in a UINavigation Controller. Instead, delete the NavigationController and make the Tabbar the root Viewcontroller then embed each UIViewcontroller in a separate Navigation controller
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've spent the past few days searching on the web for a solution to my problem, however, I can't seem to find a problem similar to mine. I am using a TabBarController and on one of the tabs I have a segmented Control in the navigation bar that I would like to use to switch between view controllers. The problem is that when I present the second view Controller it appears over the tabbarcontroller. Is there anyway to keep the modally presented Navigation controller in the tabbarcontroller?
This is the first controller.
And this is the controller I am trying to present.
well we can't really comment unless we saw some code. But I think your problem may be to do with your view hierarchy. If I was going to build what you are attempting I would do as follows:
UITabbar controller that contains a custom navigation bar controller
The custom nav bar controller would contain the segment controller and have a protocol defined so that a delegate could be alerted when either segment was selected by the user.
The nav bar's root view controller would be a view controller that acted as a UIView container for the two screens you are displaying (friends and circle screens)
This root view controller would be the delegate for the custom nav controller so that it will know when the user selected a segment.
When the user selected a segment the root view controller would then switch between the friends and circles view controllers in the container.
To do the above have a look at the documentation for creating UIViewController Containers and working with delegates
Hope that helps!
Can you embed a Split-View Controller in a UITabBarController? I have a UITabBarController in my appdelegate on the window, and I tried adding a segue to my split view controller, but when I press the correlating tab for the DetailViewController it just shows a blank screen? Is it possible to even have a split-view controller as a tab in a tabbarcontroller?
A UISplitViewController must be at the root of your controller hierarchy. From Apple's Split View Controllers documentation:
A split view controller must always be the root of any interface you
create. In other words, you must always install the view from a
UISplitViewController object as the root view of your application’s
window. The panes of your split view interface may then contain
navigation controllers, tab bar controllers, or any other type of view
controller you need to implement your interface. Split view
controllers cannot be presented modally
I am confused with behavior, I have Tab Bar Controller ( I enter on this controller from simple view controller which is embedded in navigation controller). I am confused why is that navigation bar from tab is covered up child navigation bar.
When I start app and I enter at Browse Controller I cannot see Browse title, neither nav bar items which I added programmatically. Can somebody give me clue what is wrong ( I am new to this, I connect with push segue from tab to browse).
Your problem appears to be the same as the one I addressed here:
Push segue from a view controller controlled by UITabBarController
What's happening is that your first NavigationController is creating a Navigation stack. Then you push-segue a TabViewController. That is added to the Nav stack, along with each of it's contained view controllers. However, when you PUSH SEGUE from one of those view controllers to some other view controller, the original navigation controller's stack is the one you are pushing on to. This is not contained inside the tab view controller, so the pushed view controller has no relationship with that tab view controller, just the original navigation controller stack. Therefore the tabs are not present.
The answer is to embed each of the tab controller's view controllers in a new navigation controller, and push on from those. The original navigation controller is just messing things up here...