Swift Tabbar with a custom shape in the middle - ios

Question

i want to make this shape in swift .
As you can see, the tabbar has a raised center button. However, this is not the only thing as there should be a real hole in the tabbar so that it is transparent there.
How can I create such a hole inside a tabbar? And then put a raised, round button in that hole?
I would gladly appreciate any help regarding my question.
i am trying but cannot achieve the above result.
import Foundation
import UIKit
#IBDesignable
class AppTabBar: UITabBar {
private var shapeLayer: CALayer?
override func draw(_ rect: CGRect) {
self.addShape()
}
private func addShape() {
let shapeLayer = CAShapeLayer()
shapeLayer.path = createPath()
shapeLayer.strokeColor = UIColor.lightGray.cgColor
shapeLayer.fillColor = #colorLiteral(red: 0.9782002568, green: 0.9782230258, blue: 0.9782107472, alpha: 1)
shapeLayer.lineWidth = 0.5
// The below 4 lines are for shadow above the bar. you can skip them if you do not want a shadow
shapeLayer.shadowOffset = CGSize(width:0, height:0)
shapeLayer.shadowRadius = 10
shapeLayer.shadowColor = UIColor.gray.cgColor
shapeLayer.shadowOpacity = 0.3
if let oldShapeLayer = self.shapeLayer {
self.layer.replaceSublayer(oldShapeLayer, with: shapeLayer)
} else {
self.layer.insertSublayer(shapeLayer, at: 0)
}
self.shapeLayer = shapeLayer
}
func createPath() -> CGPath {
let height2: CGFloat = self.frame.height
let height: CGFloat = 86.0
let path = UIBezierPath()
let centerWidth = self.frame.width / 2
let startXpoint = centerWidth - height + 57
let endXpoint = (centerWidth + height - 45)
path.move(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: startXpoint , y: 0))
// path.addCurve(to: CGPoint(x: centerWidth, y: height - 40),
// controlPoint1: CGPoint(x: (centerWidth - 30), y: 0), controlPoint2: CGPoint(x: centerWidth - 35, y: height - 40))
path.addCurve(to: CGPoint(x: centerWidth, y: height / 1.6),
controlPoint1: CGPoint(x: startXpoint - 5, y: height2 / 3), controlPoint2: CGPoint(x: (centerWidth - 10), y: height2 / 1.6))
path.addCurve(to: CGPoint(x: (centerWidth + height / 2.9 ), y: 0),
controlPoint1: CGPoint(x: centerWidth + 35, y: height - 40), controlPoint2: CGPoint(x: (centerWidth + 30), y: 0))
path.addLine(to: CGPoint(x: self.frame.width, y: 0))
path.addLine(to: CGPoint(x: self.frame.width, y: self.frame.height))
path.addLine(to: CGPoint(x: 0, y: self.frame.height))
path.close()
return path.cgPath
}
override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
guard !clipsToBounds && !isHidden && alpha > 0 else { return nil }
for member in subviews.reversed() {
let subPoint = member.convert(point, from: self)
guard let result = member.hitTest(subPoint, with: event) else { continue }
return result
}
return nil
}
}
extension UITabBar {
override open func sizeThatFits(_ size: CGSize) -> CGSize {
var sizeThatFits = super.sizeThatFits(size)
sizeThatFits.height = 74
return sizeThatFits
}
}