更新表单值时使用Combine + SwiftUI更新值

import Combine

class FormViewModel: ObservableObject {
    @Published var name: String = ""
    @Published var age: Int = 0
}

struct ContentView: View {
    @ObservedObject var formViewModel = FormViewModel()
    
    var body: some View {
        Form {
            TextField("Name", text: $formViewModel.name)
            Stepper(value: $formViewModel.age, in: 0...100) {
                Text("Age: \(formViewModel.age)")
            }
        }
    }
}

struct ContentView: View {
    @ObservedObject var formViewModel = FormViewModel()
    private var cancellables = Set<AnyCancellable>()
    
    var body: some View {
        Form {
            TextField("Name", text: $formViewModel.name)
            Stepper(value: $formViewModel.age, in: 0...100) {
                Text("Age: \(formViewModel.age)")
            }
        }
        .onAppear {
            formViewModel.$name
                .sink { value in
                    // 处理name值的变化
                }
                .store(in: &cancellables)
            
            formViewModel.$age
                .sink { value in
                    // 处理age值的变化
                }
                .store(in: &cancellables)
        }
    }
}