why UITabbarController is going too bottom - ios

Question

I have Implemented top items a view with UICollectionview and UIPagecontroller to get android like pagetabs.
For each menu there is a container ViewController but in one of them need UITabBarController.
Why UITabBarController is going down.
I have tried moving menuVIew(Contacts,Recents,etc) up but still did not work.

Answer 1

For the top view, use UISegmentedControl, and make background color, same as border color.
For the tab bar, you mean that it is covered by home indicator?
Turn on Use Safe Area Layout Guides, for this UITabController, and you should be good to go.

Answer 2

let tabBar = UITabBar()
override func viewDidLoad() {
super.viewDidLoad()
addTabbar()
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
addHeightConstraintToTabbar()
}
func addTabbar() -> Void {
self.view.addSubview(tabBar)
tabBar.translatesAutoresizingMaskIntoConstraints = false
tabBar.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true
tabBar.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
tabBar.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
let item1 = UITabBarItem(tabBarSystemItem: UITabBarSystemItem.bookmarks, tag: 1)
let item2 = UITabBarItem(tabBarSystemItem: UITabBarSystemItem.contacts, tag: 2)
tabBar.items = [item1, item2]
self.view.bringSubview(toFront: tabBar)
}
func addHeightConstraintToTabbar() -> Void {
let heightConstant:CGFloat = self.view.safeAreaInsets.bottom + 49.0
tabBar.heightAnchor.constraint(equalToConstant: heightConstant).isActive = true
}
Result:

Answer 3

I have faced this issue before for iPhone X. I found a weird solution of this as below:
Change the bottom constraint from TabBar to Safe Area not the Super view and change the constraint value to 1 as shown in the below image.
This works on both The normal devices and devices with notch display. Check out the screenshots :
Hope this helps you.