如何在SwiftUI中以编程方式设置UI界面方向

import SwiftUI

struct OrientationKey: EnvironmentKey {
    static let defaultValue: UIInterfaceOrientationMask = .portrait
}

extension EnvironmentValues {
    var orientation: UIInterfaceOrientationMask {
        get { self[OrientationKey.self] }
        set { self[OrientationKey.self] = newValue }
    }
}

struct OrientationModifier: ViewModifier {
    let orientation: UIInterfaceOrientationMask
    
    func body(content: Content) -> some View {
        content
            .environment(\.orientation, orientation)
    }
}

struct ContentView: View {
    var body: some View {
        Text("Hello, World!")
            .modifier(OrientationModifier(orientation: .landscape))
    }
}