如何使用SwiftUI检测当前设备？

import SwiftUI

struct ContentView: View {
    @Environment(\.horizontalSizeClass) var horizontalSizeClass
    @Environment(\.verticalSizeClass) var verticalSizeClass
    
    var body: some View {
        VStack {
            Text("当前设备:")
            Text(getDeviceType())
        }
    }
    
    func getDeviceType() -> String {
        if horizontalSizeClass == .compact && verticalSizeClass == .regular {
            return "iPhone"
        } else if horizontalSizeClass == .regular && verticalSizeClass == .regular {
            return "iPad"
        } else if horizontalSizeClass == .compact && verticalSizeClass == .compact {
            return "Apple Watch"
        } else {
            return "Unknown"
        }
    }
}

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