SwiftUI View pulsating effect

View+pulsating.swift

//
//  View+pulsating.swift
//
//  Created by Magnus Jensen on 02/10/2021.
//

import SwiftUI

extension View {
    func pulsating() -> some View {
        self.modifier(OpacityFadingModifier())
    }
}

private struct OpacityFadingModifier: ViewModifier {
    @State private var value = 1.0
    func body(content: Content) -> some View {
        content
            .opacity(value)
            .transition(.scale) // Fixes an issue moving the `content` when in a list
            .animation(.easeOut(duration: 0.5).repeatForever(autoreverses: true), value: value)
            .onAppear {
                value = 0.25
            }
    }
}

struct View_pulsating_Previews: PreviewProvider {
    static var previews: some View {
        Color.green.pulsating()
    }
}