Change button background colour on tap in SwiftUI

Question

I am trying to change colour of my Button in SwiftUI. This is my whole CustomButton view struct:

struct CustomButton: View {

    @State private var didTap:Bool = false

    var body: some View {
        Button(action: {
            self.didTap = true
        }) {

        Text("My custom button")
            .font(.system(size: 24))
        }
        .frame(width: 300, height: 75, alignment: .center)
        .padding(.all, 20)
        .background(Color.yellow)

        //My code above this comment works fine

        //I tried something like this, but it is not working
     //   if didTap == true {
     //   .background(Color.blue)
     //    }

    }
}

This is what my button looks like (which is fine):

But my question is: how can I change the background colour when user taps this button.

Thank you.

Answer 1

Just in case somebody wanted different way of doing this. It works for more colors.

struct CustomButton: View {

    @State private var buttonBackColor:Color = .yellow

    var body: some View {
        Button(action: {

            //This changes colors to three different colors.
            //Just in case you wanted more than two colors.
             if (self.buttonBackColor == .yellow) {
                 self.buttonBackColor = .blue
             } else if self.buttonBackColor == .blue {
                 self.buttonBackColor = .green
             } else {
                 self.buttonBackColor = .yellow
             }

            //Same code using switch
            /*
             switch self.buttonBackColor {
             case .yellow:
                 self.buttonBackColor = .blue
             case .blue:
                 self.buttonBackColor = .green
             default:
                 self.buttonBackColor = .yellow
             }
             */
        }) {

        Text("My custom button")
            .font(.system(size: 24))
        }
        .frame(width: 300, height: 75, alignment: .center)
        .padding(.all, 20)
        .background(buttonBackColor)
    }
}