How to center custom tabbar item on iPhone X - ios

Question

I have an app where I created a custom tabbar item in a UITabbarController, that someone can press to take a picture, and it looks like it does below.
That is exactly what I want, the problem is that when I test it on an iPhone X, the tabbar item for the camera looks lower then I would like, for example:
I have tried a couple of things to fix this, such as fixing the height of the tabbar in the viewDidLayoutSubviews(), but it messed with the tabbar on the iPhone 8. I also made sure that the "Use Safe Area Layout Guides" is selected, but it still doesn't work.
I also tried to change the frame of the tabbar item, but that doesn't work either.
This is the code that I used for the custom tabbar Controller:
import UIKit
class OtherTabController: UITabBarController, UITabBarControllerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
setupBtn()
// Do any additional setup after loading the view.
}
func setupBtn() {
let centerBtn = UIButton(frame: CGRect(x: 0, y: 10, width: 45, height: 45))
var centerBtnFrame = centerBtn.frame
centerBtnFrame.origin.y = (view.bounds.height - centerBtnFrame.height) - 2
centerBtnFrame.origin.x = view.bounds.width/2 - centerBtnFrame.size.width/2
centerBtn.frame = centerBtnFrame
centerBtn.layer.cornerRadius = 35
view.addSubview(centerBtn)
let centerImg = UIImage(named: "Other")
centerBtn.setBackgroundImage(centerImg, for: .normal)
centerBtn.addTarget(self, action: #selector(centerBtnAction(sender:)), for: .touchUpInside)
view.layoutIfNeeded()
}
#objc private func centerBtnAction(sender: UIButton) {
print("Camera")
cameraAction()
}
func cameraAction() {
let alertController = UIAlertController.init(title: nil, message: nil, preferredStyle: .actionSheet)
let takePhotoAction = UIAlertAction(title: "Take a Photo", style: .default, handler: nil)
alertController.addAction(takePhotoAction)
let selectFromAlbumAction = UIAlertAction(title: "Select from Album", style: .default, handler: nil)
alertController.addAction(selectFromAlbumAction)
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: nil)
//OtherTabController?.present(alertController, animated: true, completion: nil)
}
}
If there is anything else I could help with, please ask. Thank you
EDIT:
I tried to make the y view the same as the super view but all it did was move the button to the top of the screen.
var centerBtnFrame = centerBtn.frame
centerBtnFrame.origin.y = view.bounds.minY //Make centerBtn' top equal to that of view's
centerBtnFrame.origin.x = view.bounds.width/2 - centerBtnFrame.size.width/2
centerBtn.frame = centerBtnFrame
If you need any more info, please ask. Thank you
Edit:
With the help of #Revanth Kausikan, I decided to create a custom tabbar with a view and a few buttons. It works very well in my opinion. It looks a little rough around the edges, but this is just a test for now.
Here is the code for the view:
import UIKit
class ItemScene: UIViewController {
#IBOutlet var customTab: UIView!
#IBOutlet weak var cameraBtn: UIButton!
#IBOutlet weak var twoBtn: UIButton!
#IBOutlet weak var oneBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func cameraBtnPressed(_ sender: Any) {
print("Camera")
}
#IBAction func twoBtnPressed(_ sender: Any) {
self.performSegue(withIdentifier: "segue", sender: nil)
print("Two")
}
#IBAction func oneBtnPressed(_ sender: Any) {
print("One")
}
}
this is the code for the second ViewController:
import UIKit
class TestingViewController: UIViewController {
#IBOutlet weak var cameraBtn: UIButton!
#IBOutlet weak var oneBtn: UIButton!
#IBOutlet weak var twoBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
#IBAction func cameraBtnPressed(_ sender: Any) {
print("Camera")
}
#IBAction func twoBtnPressed(_ sender: Any) {
print("Two")
}
#IBAction func oneBtnPressed(_ sender: Any) {
performSegueToReturnBack()
print("One")
}
}
extension UIViewController {
func performSegueToReturnBack() {
if let nav = self.navigationController {
nav.popViewController(animated: true)
} else {
self.dismiss(animated: true, completion: nil)
}
}
}
If anyone has anything else to add it would be greatly appreciated. Thank you

Answer 1

The Y point of button frame must be the same as that of it's super view (i.e. tab bar here).
If you've not created an outlet for the tab bar, first do so.
Ctrl (or right) click and drag from your tab bar in the storyboard to its associated view controller, to create an outlet. (assume that I'm naming it as tabBar)
now try this:
var centerBtnFrame = centerBtn.frame
let tabBarFrame = self.convert(tabBar.frame, to: view)
centerBtnFrame.origin.y = tabBarFrame.minY //Make centerBtn' top equal to that of tabBar's
centerBtnFrame.origin.x = view.bounds.width/2 - centerBtnFrame.size.width/2
centerBtn.frame = centerBtnFrame
Alternatively, you can try this:
var centerBtnFrame = centerBtn.frame
centerBtnFrame.origin.y = view.height - tabBar.height //This is the same logic as you've used for fixing x value of centerBtnFrame.
centerBtnFrame.origin.x = view.bounds.width/2 - centerBtnFrame.size.width/2
centerBtn.frame = centerBtnFrame
Yet another approach is to go back to the constraints, and make sure the elements and the base view are within the safe area.
If my guess is right (since you've not provided details about the constraints in the question), you've set the base view (the view that is in the bottom/base, holding all other elements on it) to fit itself with the entire view are of the view controller. Consider changing it to fit itself within the safe area.
Let me know the results.
EDIT
My opinion on your new attempt: It's really good, and I see that you are now able to customize it a lot more.
To improve it, you can try these:
Here, there are three views that are clickable in nature. we can use this to increase the interactive area as per our wish, to provide a natural experience for the user.
Here are it's constraints:
Other than these suggestions, I don't think I need to provide any. Your method is self sufficient for your implementation idea.
:)

Answer 2

Try this code working 100% ...
Declare the button
var menuButton = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
setupMiddleButton()
}
//create the method
func setupMiddleButton(flag:String) {
menuButton = UIButton(frame: CGRect(x: 0, y: 0, width: 60, height: 60))
var menuButtonFrame = menuButton.frame
menuButtonFrame.origin.y = tabBar.bounds.height - menuButtonFrame.height
menuButtonFrame.origin.x = tabBar.bounds.width/2 - menuButtonFrame.size.width/2
menuButton.frame = menuButtonFrame
menuButton.backgroundColor = UIColor.red
menuButton.layer.borderColor = UIColor.black.cgColor
menuButton.layer.borderWidth = 1
tabBar.addSubview(menuButton)
menuButton.layer.cornerRadius = menuButtonFrame.height/2
menuButton.setImage(UIImage(named: "Homenormal"), for: .normal)
menuButton.addTarget(self, action: #selector(menuButtonAction(sender:)), for: .touchUpInside)
}
//button methods inside add background colour
#objc private func menuButtonAction(sender: UIButton) {
menuButton.backgroundColor = UIColor.red
selectedIndex = 2
print("menuButtonActio=\(sender.tag)")
}
//next Tabbar didselect
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
let Selected_index = tabBar.items?.lastIndex(of: item)
print("selectedIndex123=\(Selected_index)")
if Selected_index == 0 {
menuButton.backgroundColor = UIColor.darkGray
menuButton.layer.borderColor = UIColor.black.cgColor
}
else if Selected_index == 1 {
menuButton.backgroundColor = UIColor.darkGray
menuButton.layer.borderColor = UIColor.black.cgColor
}
else if Selected_index == 2 {
menuButton.backgroundColor = UIColor.red
menuButton.layer.borderColor = UIColor.black.cgColor
}
else if Selected_index == 3 {
menuButton.backgroundColor = UIColor.darkGray
menuButton.layer.borderColor = UIColor.black.cgColor
}
else if Selected_index == 4 {
menuButton.backgroundColor = UIColor.darkGray
menuButton.layer.borderColor = UIColor.black.cgColor
}
}