在SwiftUI中有条件地更改滑块的缩略图

import SwiftUI

struct ContentView: View {
    @State private var sliderValue: Double = 0.5
    
    var body: some View {
        VStack {
            if sliderValue < 0.5 {
                Image(systemName: "arrow.left")
                    .font(.largeTitle)
            } else {
                Image(systemName: "arrow.right")
                    .font(.largeTitle)
            }
            
            Slider(value: $sliderValue)
                .padding()
        }
    }
}

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