Tapping a heart / like button

import SwiftUI

struct LikeButton: View {
    @State private var isLiked = false

    var body: some View {
        Button {
            withAnimation(.spring(response: 0.3, dampingFraction: 0.5)) {
                isLiked.toggle()
            }
        } label: {
            Image(systemName: isLiked ? "heart.fill" : "heart")
                .font(.title)
                .foregroundStyle(isLiked ? .red : .secondary)
                .scaleEffect(isLiked ? 1.15 : 1.0)
        }
        // Soft tap when liking, lighter when unliking
        .sensoryFeedback(trigger: isLiked) { _, liked in
            .impact(flexibility: .soft, intensity: liked ? 0.8 : 0.5)
        }
    }
}

import UIKit

final class LikeButton: UIButton {
    private let haptic = UIImpactFeedbackGenerator(style: .soft)
    private(set) var isLiked = false

    override init(frame: CGRect) {
        super.init(frame: frame)
        setImage(UIImage(systemName: "heart"), for: .normal)
        addTarget(self, action: #selector(touchDown), for: .touchDown)
        addTarget(self, action: #selector(toggleLike), for: .touchUpInside)
    }
    required init?(coder: NSCoder) { fatalError() }

    @objc private func touchDown() {
        haptic.prepare() // wake the engine before the finger lifts
    }

    @objc private func toggleLike() {
        isLiked.toggle()
        haptic.impactOccurred(intensity: isLiked ? 0.8 : 0.5)
        setImage(UIImage(systemName: isLiked ? "heart.fill" : "heart"), for: .normal)
        tintColor = isLiked ? .systemRed : .secondaryLabel
    }
}