如何使用SwiftUI显示准确的星级？

import SwiftUI

struct RatingView: View {
    @Binding var rating: Int
    
    var body: some View {
        HStack {
            ForEach(1...5, id: \.self) { index in
                Image(systemName: index <= rating ? "star.fill" : "star")
                    .foregroundColor(.yellow)
                    .onTapGesture {
                        self.rating = index
                    }
            }
        }
    }
}

struct ContentView: View {
    @State private var rating = 3
    
    var body: some View {
        VStack {
            Text("请选择星级：\(rating)")
            RatingView(rating: $rating)
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}