I have a UINavigationController embedded inside a UITabBarController.
The problem is that my content always appears underneath the bars. I have a collection view with x & y set to 0 which appears fine. The green view however is just a simple UIView with the same x & y positions.
My question is, how can I make the content properly show at the expected y coordinate of 0?
Set the isTranslucent property to false on both the navigation bar and the tab bar.
For the nav bar:
navigationController.navigationBar.isTranslucent = false
For the tab bar:
tabBarController.tabBar.isTranslucent = false
Where you do this will depend on how your code is structured, but the easiest spot for each will likely be right after you initialize the tab bar controller and the navigation controller.
Related
In the image shared, the orange section is the bar section , which is having unnecessary height, I am not able to resolve this issue by myself.
the views are like this
Parent Controller = View Controller
Child views = green view, black tableview
Please help to correct the height of the orange bar.
Seems like you have enabled prefersLargeTitles.
Make it false in your viewWillAppear()
self.navigationController?.navigationBar.prefersLargeTitles = false
You can also disable it from the storyboard.
Select your Navigation Controller -> Navigation Bar -> Uncheck prefers large titles
it seems like you're using the largeTitles on the navigationBar,
var prefersLargeTitles: Bool { get set }
When this property is set to true, the navigation bar allows the
title to be displayed out-of-line and using a larger font. The
navigation item used to build the bar must specify whether it wants
its title displayed in the large or small format. Use the
largeTitleDisplayMode property to configure the title's appearance.
When the property is set to false, the navigation bar displays the
title inline with the other bar button items.
try to disable it by:
navigationController?.navigationBar.prefersLargeTitles = false
or you can do this as well:
navigationItem.largeTitleDisplayMode = .never
hope this helps:)
https://developer.apple.com/documentation/uikit/uinavigationbar/2908999-preferslargetitles
I have a simple view controller which is being rendered modally simply by using
viewController.present(myVC, animated: true, completion: nil)
myVC view controller does not have any embedded navigation controller and in viewDidLoad of myVC I am setting view which is supposed to behave like navigation bar view (I can't use navigation bar / navigation controller unfortunately)
Here is how I add the view programmatically
self.view.addSubview(topView)
topView.translatesAutoresizingMaskIntoConstraints = false
topView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
topView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
topView.topAnchor.constraint(equalTo: self.topLayoutGuide.bottomAnchor).isActive = true
topView.heightAnchor.constraint(equalToConstant: 70).isActive = true
I have specified extended edges as top in my viewDidLoad of myVC
self.edgesForExtendedLayout = .top
And the UI looks like
There is a gap between status bar and view added highlighted by yellow border which I am not sure how to fix :(
Please help
You get the gap because you are adding your topView's top constraint to the view's topLayoutGuide.bottom (which sits a bit below the notch). So that is intended behavior.
The cleanest way to get rid of that gap is to embed you view controller in a UINavigationController and use a real navigation bar.
But if you cannot do that you have to get rid of the gap yourself.
I cannot think of an elegant way to get rid of this gap but you could add a negative constant to the constraint that is as high as the gap:
topView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: -14).isActive = true
But you would have to make sure that this is only done on devices that have a safeAreaLayoutGuide.topAnchor > 0. (iPhoneX etc.). On all other devices the constant has to be 0.
As I said this is not a very stable or elegant solution but it would work.
BTW If possible you should change self.topLayoutGuide.bottomAnchor (deprecated) to view.safeAreaLayoutGuide.topAnchor.
Preface: I'm doing everything programmatically. 0 interface builder.
Previously, when pushing a VC onto a navVC stack, the pushed VC would have the upper edge occluded by the navbar. I want it so the top edge of the pushed VC is under the nav bar. I found that "edgesForExtendedLayout" did what I wanted to. Except Apple says:
"Instead of this property, use the safe area of your view to determine which parts of your interface are occluded by other content. For more information, see the safeAreaLayoutGuide and safeAreaInsets properties of UIView."
I have no idea how to translate the following code:
if let nextVC = getNextVC() {
nextVC.edgesForExtendedLayout = .init(rawValue: 0)
pushViewController(nextVC, animated: true)
}
To use safeAreaLayoutGuide or safeAreaInsets. I can't use constraints because the pushed view is not in the view hierarchy yet?
I've attached some images to give an idea of what I'm dealing with.
Green = border of UINavigation controller
Yellow = border of 'nextVC'
Red = border of table inside 'nextVC'
With edgesForExtendedLayout set to "none" - right, but changing value Apple says not to change:
With edgesForExtendedLayout set to "all" - wrong, but default value Apple says to keep:
I'd like to create pager tab like InstagramExample of XLPagerTabStrip and I follow all layout and coding to get the same. After adding everything I cannot see the title label on pager tab but I can swipe views as much as I add in array. Could anyone help me with this issue, please? I use the latest version of XLPagerTabStrip (v7.0.0).
The pager tab is covered by NavigationBar.
so ,you can
1: to hide NavigationBar
self.navigationController?.isNavigationBarHidden = true
2: to move tab
//get rod of containerView offset
edgesForExtendedLayout = []
//move tab
buttonBarView.frame.origin.y = buttonBarView.frame.origin.y + 30
I'm took the Tabbar viewcontroller in this ,I added the 5 item and .I given the image insects is (24,0,0,6).
All button images are added in xib [under the Bar item -->image]Please help.
Thanks.
Adding to a similar answer here:
iOS Tab Bar icons keep getting larger
Not sure if this is an iOS7 bug but I've noticed that image insets need to be balanced.
You have specified insets for top and right but:
if you set a top inset, in order to balance it, you need to set the negative of it to the bottom inset
if you set a right inset, in order to balance it, you need to set the negative of it to the left inset
So, instead of having image insets like (24,0,0,6), use balanced image insets such as UIEdgeInsetsMake(24,-6,-24,6)
Doing so should protect your tabBarItem image from getting whacked on every tap.
If this doesn't suit your requirements, then redesign your tabBarItem image so you can have balance insets or... no insets at all.
Here's the workaround for a bug I've encountered with UITabBarController's UITabBar. If I tap a UITabBarItem once after it's selected, the icon shrinks. What I'd like to do is disable touches. UITabBarItem only has a setting for isEnabled, which grays it out if I set it to false...not what I was looking for.
I used a derivative of this answer to figure it out. With a UITabBarController with 3 tabs, printing tabBarController.subviews, I saw 3 UITabBarButtons and a UIBarBackground. The origin of UIBarBackground's frame was always (0, 0), putting it at the front of the sorted array, so I really don't need to know what the subview is, just "where it is" and whether it will always be there. The UIBarBackground is always going to be at the front of an array of tabBarController.subviews sorted by frame.minX, so I just need to remove it from the front.
Solution
Here's what the extension looks like:
extension UITabBarController {
var buttonViews: [UIView] {
var tabBarButtons = tabBar.subviews.sorted(by: {$0.frame.minX < $1.frame.minX})
tabBarButtons.removeFirst()
return tabBarButtons
}
}
I also created a struct in my Constants file, so I don't have to remember tab names:
struct TabBarItem {
static let firstTab = 0
static let secondTab = 1
static let thirdTab = 2
}
...and finally, where to use it:
In viewDidAppear (NOT viewDidLoad), add the following line to disable the UITabBarItem that you don't want to disable, but not gray out:
tabBarController?.buttonViews[TabBarItem.firstTab].isUserInteractionEnabled = false
In viewWillDisappear, re-enable the tab, as follows:
tabBarController?.buttonViews[TabBarItem.firstTab].isUserInteractionEnabled = true