SwiftuI ToastView example

SwiftUIToastView.swift

import SwiftUI

struct ToastView: View {
     @State private var liked: Bool = false

       var body: some View {
           VStack {
               LikeButton(liked: $liked)
           }
          .toast(isShowing: $liked, text: Text("Hello toast!"))
       }
    
}

//https://stackoverflow.com/questions/56550135/swiftui-global-overlay-that-can-be-triggered-from-any-view

struct Toast<Presenting>: View where Presenting:View {
    @Binding var isShowing: Bool
    let presenting: () -> Presenting
    let text: Text
    var body: some View {

        GeometryReader { geometry in

            ZStack(alignment: .center) {

               self.presenting()
                    .blur(radius: self.isShowing ? 1 : 0)

                VStack {
                    self.text
                }
                .frame(width: geometry.size.width / 2,
                       height: geometry.size.height / 5)
                .background(Color.secondary.colorInvert())
                .foregroundColor(Color.primary)
                .cornerRadius(20)
                .transition(.slide)
                .opacity(self.isShowing ? 1 : 0)
                .onAppear {
                    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
                        withAnimation {
                            self.isShowing = false
                        }
                    }
                }
                .onTapGesture(count: 1, perform: {
                    withAnimation {
                        self.isShowing = false
                    }
                })

            }

        }

    }
}

struct LikeButton : View {
    @Binding var liked: Bool

    var body: some View {
        Button(action: { self.toggleLiked() }) {
            Image(systemName: liked ? "heart" : "heart.fill")
        }
    }

    private func toggleLiked() {
        self.liked = !self.liked
        // NEED SOME SORT OF TOAST CALLBACK HERE
    }
}

extension View {

    func toast(isShowing: Binding<Bool>, text: Text) -> some View {
        Toast(isShowing: isShowing,
              presenting: { self },
              text: text)
    }

}
struct ToastView_Previews: PreviewProvider {
    
    static var previews: some View {
        
        ToastView()
    }
}