I added UIViewController which has no storyboard to UITabBar.
It seems the view of added VC goes under the tab bar which does not
happen when I add a vc which used Storybaord to UITabBar.
How can I prevent this?
If you don't want the viewcontroller extend to any edges, you can try:
viewController.edgesForExtendedLayout = []
or viewController.extendedLayoutIncludesOpaqueBars = false should also work
Related
I've added a custom UIView to my base UITabBarController. I start by hiding the default tabBar. The viewdidload looks like this in UITabBarController:
override func viewDidLoad() {
super.viewDidLoad()
//hide default tab bar
self.tabBar.isHidden = true
tabBarArea.frame.size.width = self.view.frame.width
tabBarArea.frame.origin.y = self.view.frame.height - tabBarArea.frame.height
self.view.addSubview(tabBarArea)
}
That works well. The tabBarArea is defined in the storyboard as a custom view for the UITabBarController. The custom view sits between the First Responder and the Exit icons in the top bar.
Now, the problem is that the UITabBarController will disappear as soon as we load a child view controller and this custom UIView area will vanish with it.
Is there a way to make this root custom view always present even when child view controllers are loaded in?
Thanks for input. I like the idea of this custom UIView area but this approach needs refinement. I also don't need it to be a traditional UITabBarController with tab bar items, etc. I'd like to break out of that mold and just have custom UIButtons are whatever in this view area.
I want to make a custom side bar by adding a new view to the view controller, the side bar will be in the yellow color background. I want my side bar also to overlap the navigation bar/item (green background color) in my view controller. but the navigation bar/item seems can't be overlapped by my side bar view, it seems only overlap the main view.
I tried to find the answer in stackoverflow, I find this Overlap navigation bar on ios 6 with other view, but the answer is on the Objective-C, I can't read Objective-C :(
What should I do to overlap navigation bar/item ? here is the screenshot of my view controller
I embed the navigation controller like this
There are plenty of implementations of slide-over or drawer containers.
What you need to do to get above the navigation bar is CONTAIN the navigation controller inside another view controller.
The stack would look like this.
MasterViewController
UINavigationController
RootViewController
Menu
See this one here:
Swift version of MMDrawerController
You can do this by changing your UIViewController hierarchy. For this you'll need three view controllers. First will contain everything, let's call it MasterViewController; second—your main content with navigation bar; and third—drawer.
In MasterViewController instantiate child view controllers and add them to your view controller hierarchy in viewDidLoad().
final class MasterViewController: UIViewController {
override func viewDidLoad() {
let drawerViewController = DrawerViewController()
let mainViewController = MainContentViewController()
let navigationController = UINavigationController(rootViewController: mainViewController)
addChildViewController(drawerViewController)
addChildViewController(navigationController)
view.addSubview(navigationController.view)
view.addSubview(drawerViewController.view)
}
}
Now you have navigationController.view that you can place or animate anywhere within view.
I have a simple UICollectionView with a custom cell inside of a navigationController. For some reason when I push a viewController, the collectionView cell changes its layout during the transition.
Is it some common behavior of uicollectionview during viewController transition? Because, for example: labels don't have such problem
When back button was clicked
Green color from collectionView
Adding new view controller
navigationController?.pushViewController(controller, animated: true)
Setting Autolayout using EasyPeasy pod
collectionView.easy.layout([
Top(),
Right(),
Width(view.frame.width),
Bottom(10).to(button),
])
button.easy.layout([
Center(),
Height(60),
Width(300),
])
I think I've found your problem and it's in you AppDelegate. The property isTranslucent which is set to false to your navigation controller seems to cauese this rare problem. A translucent navigation bar will be on top of your viewcontroller's view, like above it. A non-translucent navigation bar pushes down your view controller's view or in other words rezising it so it fits beneath it.. But why the collectionview animates like it does is something I actually cant give a definite answer about. Maybe someone else could do that?..
To keep your navigation bar translucent you can set another property in your viewcontroller which is ´extendedLayoutIncluedsOpaqueBars´ to true.
So.. Do like this. In your AppDelegate:
window = UIWindow(frame: UIScreen.main.bounds)
window!.makeKeyAndVisible()
let controller = TestingNavigationController()
let navigation = UINavigationController(rootViewController: controller)
window!.rootViewController = navigation
let navigationBarAppereance = UINavigationBar.appearance()
navigationBarAppereance.isTranslucent = false
Then, in your view controllers viewDidLoad method add this line
extendedLayoutIncludesOpaqueBars = true
Hope this will solve your problem! :)
Apple Documentation about extendedLayoutIncludesOpaqueBars
I've set the titleView of a UIViewController's navigationItem after init(). After pushing the VC to UINavigationController, titleView appears correctly at first time. But when I change (re-set) a titleView to an other view, it suddenly disappears.
But when I push another view controller and navigate back, it suddenly appears.
Do I have to perform any actions after re-setting the titleView?
If you are not using tab bar controller, then in viewDidLoad
setting the title as self.title is better.I have mentioned Tab bar Controller because if you have a view controller (in a NavigationController) in a UITabBarController, then if you set self.title it overrides the name of the tab as well as the top title.
I think you maybe code like this:
self.navigationItem.titleView = self.yourView;
If your yourView is a custom class , it maybe remove from superView when you switch your viewcontroller to next one;
So code like this maybe solve your problem:
[self.navigationItem.titleView addSubview:yourView];
I have TabBar with 2 tabs. At some point, from either of the 2 tabs, I want to add a view that is visible on both tab views but behind the TabBar.
So I thought, insert a subview into the TabBarController but below the TabBar.
This works fine in principle and I have the view behind the TabBar but now covering my 2 tabs as I wanted. However, it doesn't actually load. Just its background loads and only viewDidLoad() is called, not viewWillAppear() or any others.
I have also tried calling addChildViewController(myVC) on the TabBarController which has no effect, and also manually calling viewWillAppear() on the view controller I add which also has no effect (and I'm also dubious about whether manually calling viewWillAppear() is permitted or not?).
Is what I'm trying to do possible? What am I missing? Or should I be attempting this some other way?
For some reason, when inserting a subview into a UITabBarController behind it's UITabBar, although the view is visible to the user, the system itself seems to think it is not and so although viewDidLoad() is called, viewDidAppear() and subsequent methods are not.
However, adding a subview above the UITabBar seems to work fine. So I solved this by adding my own new UITabBar as a subview to the UITabBarController (set up basically exactly as the default one would be) and then removing the UITabBarController's default UITabBar.
Then when later inserting my view into the UITabBarController, I insert it as I was doing originally but instead below/behind my custom UITabBar and it seems to load fine.
There is no need to remove and recreate the tabBar. What you need to do is after you insert your custom view, you can then bring the tabBar to the front again.
//bring the tabBar to the front after inserting new view
self.view.bringSubview(toFront: self.tabBar)
This would be a good way:
Add the function below and call it in viewDidLoad of your initial VC. It unwraps your tab bar controller instance (which is optional), and then inserts the view you always want visible just below the tab bar.
private func setupAlwaysVisibleView() {
guard let tabBarController = self.tabBarController else { return }
tabBarController.view.insertSubview(alwaysVisibleView, belowSubview: tabBarController.tabBar)
}
Avoid using optionals for tabBarController or removing current tabBar. Simple add your view below tabBar view. Swift 5, XCode 11.
class TabBarController: UITabBarController {
#IBOutlet var instructionsView: UIView!
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.view.insertSubview(instructionsView, belowSubview: self.tabBar)
}
}
you can also do this inside the init() method for your UITabViewController:
view.insertSubview(alwaysVisibleView, belowSubview: self.tabBar)
no need to dispatch to another method if you are using a subclass of UITabViewController.