TouchDownButton.swift

TouchDownButton.swift

import SwiftUI

struct ContentView: View {
    var body: some View {
        TouchDownButton(action: {
            print("touchDown")
        }) {
            Text("Test")
        }.onLongPressGesture {
            print("longPress")
        }
    }
}

struct TouchDownButton<Content: View>: View {
    let action: () -> Void
    let content: Content

    init(
        action: @escaping () -> Void,
        @ViewBuilder content: () -> Content
    ) {
        self.action = action
        self.content = content()
    }

    var body: some View {
        content.background(
            UITouchDownButton(action: action)
        )
    }
}

struct UITouchDownButton: UIViewRepresentable {
    let action: () -> Void

    func makeUIView(context: Context) -> UIControl {
        let control = UIControl()
        control.addTarget(
            context.coordinator,
            action: #selector(Coordinator.touchDown),
            for: .touchDown
        )
        return control
    }

    func updateUIView(_ uiView: UIControl, context: Context) {}

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    class Coordinator: NSObject {
        let parent: UITouchDownButton

        init(_ parent: UITouchDownButton) {
            self.parent = parent
        }

        @objc func touchDown() {
            parent.action()
        }
    }
    
}

#Preview {
    ContentView()
}