如何从计算属性更新ObservableObject属性？

import SwiftUI
import Combine

class MyObject: ObservableObject {
    @Published var name: String = ""
    @Published var greeting: String = ""
    
    private var cancellables = Set<AnyCancellable>()
    
    init() {
        $name
            .map { name in
                // 计算属性，根据name属性生成greeting属性
                return "Hello, \(name)!"
            }
            .assign(to: \.greeting, on: self)
            .store(in: &cancellables)
    }
}

struct ContentView: View {
    @ObservedObject var myObject = MyObject()
    
    var body: some View {
        VStack {
            TextField("Enter name", text: $myObject.name)
                .padding()
                .border(Color.gray)
            
            Text(myObject.greeting)
                .padding()
                .animation(.default) // 添加动画效果
        }
        .padding()
    }
}