SwiftUI Gradient Animation

example.swift

struct ContentView: View {
    @State private var animateGradient = false

    var body: some View {
        ZStack {
            LinearGradient(
                colors: [.red, .purple],
                startPoint: animateGradient ? .topLeading : .bottomLeading,
                endPoint: animateGradient ? .bottomTrailing : .topTrailing
            )
            .hueRotation(.degrees(animateGradient ? 0 : 360))
//            .brightness(animateGradient ? 0 : 0.1)
//            .saturation(animateGradient ? 0.9 : 1)
            .animation(.linear(duration: 10).repeatForever(), value: animateGradient)

            Text("hello")
                .foregroundColor(.white)
                .font(.largeTitle)
                .fontWeight(.black)
        }
        .frame(width: 300, height: 300)
        .onAppear { animateGradient.toggle() }
    }
}