ContentViewAndPicker.swift

@State private var selectedPlanet = ""
let planets = ["Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Neptune", "Uranus"]
    
func makePlanetPicker() -> some View {
    Picker("Planets", selection: $selectedPlanet) {
        ForEach(planets, id: \.self) { planet in
            Text(planet)
        }.navigationBarTitle("Planets")
    }
}