如何将文本到语音的输出写入Swift UI中的文件？

import SwiftUI
import AVFoundation

struct ContentView: View {
    var body: some View {
        VStack {
            Button(action: {
                convertTextToSpeechAndWriteToFile()
            }) {
                Text("Convert and Write")
            }
        }
    }
    
    func convertTextToSpeechAndWriteToFile() {
        // Convert text to speech using Tencent Cloud Text to Speech API
        let text = "Hello, World!"
        let speechData = convertTextToSpeech(text)
        
        // Write speech data to file
        let fileURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("output.wav")
        do {
            try speechData.write(to: fileURL)
            print("Speech data written to file: \(fileURL)")
        } catch {
            print("Error writing speech data to file: \(error)")
        }
    }
    
    func convertTextToSpeech(_ text: String) -> Data {
        // Call Tencent Cloud Text to Speech API to convert text to speech
        // API documentation: [Tencent Cloud Text to Speech](https://cloud.tencent.com/document/product/1073)
        // Example API: https://tts.tencentcloudapi.com/
        // Your code to call the API and obtain speech data
        
        // Dummy implementation, returning empty Data
        return Data()
    }
}

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