这里有一个演示给你。确保至少点击几次按钮进行测试，这样随机元素至少改变一次方位，然后就可以看到函数起作用了。

import SwiftUI
import UIKit

struct ContentView: View {
    var body: some View {
        Button("Change orientation", action: changeOrientation)
    }
    
    func changeOrientation() {
        // Some orientations here
        let orientations: [UIInterfaceOrientation] = [
            .landscapeLeft,
            .portrait
        ]
        // select a random orientation
        let orientation = orientations.randomElement()!
        // tell the app to change the orientation
        UIDevice.current.setValue(orientation.rawValue, forKey: "orientation")
        print("Changing to", orientation.isPortrait ? "Portrait" : "Landscape")
    }
}