如何在SwiftUI 2中将文件保存在变量中

import SwiftUI

struct ContentView: View {
    @State private var fileContent: String = ""
    
    var body: some View {
        VStack {
            TextField("Enter file content", text: $fileContent)
                .textFieldStyle(RoundedBorderTextFieldStyle())
            
            Button("Save File") {
                saveFile(content: fileContent)
            }
        }
        .padding()
    }
    
    func saveFile(content: String) {
        // 这里可以实现将文件内容保存到本地或云端的逻辑
        print("File content saved: \(content)")
    }
}

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

import SwiftUI

class FileModel: ObservableObject {
    @Published var fileContent: String = ""
    
    func saveFile() {
        // 这里可以实现将文件内容保存到本地或云端的逻辑
        print("File content saved: \(fileContent)")
    }
}

struct ContentView: View {
    @ObservedObject var fileModel = FileModel()
    
    var body: some View {
        VStack {
            TextField("Enter file content", text: $fileModel.fileContent)
                .textFieldStyle(RoundedBorderTextFieldStyle())
            
            Button("Save File") {
                fileModel.saveFile()
            }
        }
        .padding()
    }
}

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

func saveFile(content: String) {
    let fileURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("file.txt")
    
    do {
        try content.write(to: fileURL, atomically: true, encoding: .utf8)
        print("File saved successfully.")
    } catch {
        print("Failed to save file: \(error)")
    }
}