A simple demo of doing some morphing using CAShapeLayer & UIBezierPath. Animation done using CABasicAnimation.

morphing.swift

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {
    
    func addLabel() {
        let label = UILabel()
        label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
        label.text = "Hello World!"
        label.textColor = .black
        view.addSubview(label)
    }
    
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white
        
        self.view = view
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        starShow()
    }
    
    func starShow() {
        
        //: Add a CAShapeLayer to it, configure its line & fill colors
        let shape = CAShapeLayer()
        shape.frame = view.bounds.insetBy(dx: 10, dy: 10)
        shape.fillColor = UIColor.orange.withAlphaComponent(0.3).cgColor
        shape.strokeColor = UIColor.orange.cgColor
        shape.lineWidth = 3
        
        //: Function to create a BezierPath drawing a 4-branches star
        func star(center: CGPoint, ray: CGFloat, curvature: CGPoint) -> UIBezierPath {
            // Build a ✧ star
            var path = UIBezierPath()
            path.move(to: CGPoint(x: center.x+ray, y: center.y))
            path.addQuadCurve(to: CGPoint(x: center.x, y: center.y+ray), controlPoint: CGPoint(x: center.x-curvature.y, y: center.y-curvature.x))
            path.addQuadCurve(to: CGPoint(x: center.x-ray, y: center.y), controlPoint: CGPoint(x: center.x+curvature.x, y: center.y-curvature.y))
            path.addQuadCurve(to: CGPoint(x: center.x, y: center.y-ray), controlPoint: CGPoint(x: center.x+curvature.y, y: center.y+curvature.x))
            path.addQuadCurve(to: CGPoint(x: center.x+ray, y: center.y), controlPoint: CGPoint(x: center.x-curvature.x, y: center.y+curvature.y))
            return path
        }
        
        let star1 = star(center: view.center, ray: 200, curvature: CGPoint(x: 250, y: -20))
        let star2 = star(center: view.center, ray: 200, curvature: CGPoint(x: -20, y: 250))
        
        //: Start with star1
        shape.path = star1.cgPath
        
        //: Create the animation from star1 to star2 (infinitely repeat, autoreverse)
        let animation = CABasicAnimation(keyPath: "path")
        animation.toValue = star2.cgPath
        animation.duration = 1
        animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
        animation.fillMode = kCAFillModeBoth
        animation.repeatCount = .greatestFiniteMagnitude // Infinite repeat
        animation.autoreverses = true
        animation.isRemovedOnCompletion = false
        
        shape.add(animation, forKey: animation.keyPath)
        
        view.layer.addSublayer(shape)
    }
    
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()