My ViewController is embed in a UINavigationController. I have a translucent bottom bar (toolbar), and I want my ViewController to expand under the toolbar.
I checked Under Bottom Bars in Storyboard, in both the UINavigationController and the ViewController. But the ViewController still don't extend under bottom bar.
Any Ideas ? Thanks
That is the normal behavior. If the UIViewController's view would extend below the bottom bar, that portion would be inaccessible to the user. I suggest you add a semi-transparent view to the bottom instead of the default bar, in your case.
Related
I have a UIViewController that contains a UICollectionView pinned to all edges of the view. This view controller is inside a UINavigationController.
I want to gradually hide the navigation bar as I scroll down in the collection view. At the point that I have scrolled the distance of the height of the nav bar, the nav bar should be completely hidden. If I scroll back up it should gradually show the nav bar.
I have tried all the open source navigation bars on github, but none of them work correctly with iOS 12.
How can I achieve this?
UICollectionView is a subclass of UIScrollView and therefore you have access to its scrollViewDidScroll delegate method. Your UIViewController is also owned by its navigation controller, so you can create an instance property in the view controller, like navigationDelegate: UINavigationController?, that will act as a delegate. In the navigation controller, set that property equal to self and manipulate the nav bar however you want through the scroll delegate. Absolutely no need for third-party scripting for something this standard and basic.
When using the Navigation Controller it creates a new Navigation Bar on my first view controller. Intead of that bar being at the top of my screen I would like it to be on bottom. Is this possible? If not can I switch to using a different Nav Bar?
Navigation Bars are always at the top of view controllers, and cannot be moved. You could explore a TabBar or ToolBar though, depending on what you want.
Navigation Bar always appear on the top of your UIViewController when embedded in a UINavigationController. You cannot move it to any other position.
Still if you want to achieve such a requirement,
Hide the default UINavigationBar
self.navigationController?.navigationBar.isHidden = true
Create a custom UIView of same height(44) as the UINavigationBar and pin it to the bottom of your controller.
I have created a storyboard layout which contains UIViewControllers within UINavigationControllers which all connect back to a UITabBarController. There is a login page which is not connected to anything (just a UIViewController) which segues into the UITabBarController when the app detects user authentication. You can see what this looks like in the following image:
When I set the translucent property of the Navigation Bar to "false" or "No", the view y origin gets pushed down to the bottom of the Navigation Bar (which is the behavior that I am looking for). However, when I set the translucent property of the Tab Bar to "false" or "No", the Tab Bar DOES become opaque, but the view is not resized to fit between the top and bottom bars. I have unchecked the Extend Edges property for both Under Top Bars and Under Bottom Bars for all UIViewControllers, UINavigationControllers, and the UITabBarController.
When I add subviews programmatically (no auto-layout), the UIViewController's view is still the height of the entire screen, and is only pushed down from the top bar, but not pushed up from the bottom bar. While creating this question, this is the result I got on the simulator (subviews are not even starting below the Navigation Bar):
The layout that I'm trying to achieve is to have the view fit between the Navigation Bar and the Tab Bar so that both bars are opaque and no content goes underneath them. Any ideas or suggestions?
EDIT:
After eliminating individual Navigation Controllers and adding a single one before the TabBar Controller, I'm getting weird behavior including navigation items disappearing and one of my subviews still goes under bottom bar.
EDIT 2:
After doing some research, It seems that having navigation controllers inside each tab is a normal view hierarchy. Unfortunately, I still have not figured out how to limit a view controller's view to be between a navigation bar and a tab bar. Any suggestions?
I have a tab bar controller and in one of my views I want that tab bar hidden. I selected BottomBar - none in interface but when my view appears there is still a white outline at the bottom of this view. I have a container view at the bottom of this view that I want extended all the way to the bottom of the screen. There is also a navigation controller embedded after the tab bar going into this view. Not sure if that makes a difference. Any suggestions? Thanks in advance. There are some photos of what I'm talking about below.
try on viewDidLoad
[self.tabBarController.tabBar setHidden:YES];
I have a UITableView inside a UINavigationController that's inside a UITabBarController. There is a view on the bottom (I'll call it bottomView) between the table view and the tab bar that needs to stay at the bottom as the table view scrolls, so I can't put it as a footer in the table view.
The issue is that when i scroll to the bottom of the table view, there is an empty space the same height as the tab bar between the lowest content (and the scroll bar) and the top of bottomView.
I think this is because the table view is trying to automatically compensate for the tab view at the bottom, but I can't position it all the way at the bottom because of bottomView.
here's my IB layout:
and the display (last tableViewCell highlighted):
If I understand your question correct you need to set a contentInset to your tableView like this:
[self.tableView setContentInset:UIEdgeInsetsMake(0,0,44,0)];
Edit:
Ok I think I got it. Set:
self.automaticallyAdjustsScrollViewInsets=NO;
I've seen this same nav controller->tab bar->tableview situation frustratingly cause the tableview to partially overlap with the navigation bar, instead of not reaching the tab bar. To anyone having this issue when using a UITableView: ensure your navigation bar is not translucent. If you want to use this setup with a translucent navigation bar, select the UITabBarController in the Interface Builder and uncheck the "extend edges under top bars" option in the attributes inspector.