如何在包含选取器的SwiftUI窗体中隐藏键盘？

import SwiftUI
import Combine

@State private var isKeyboardVisible = false

struct HideKeyboard: ViewModifier {
    @State private var keyboardHeight: CGFloat = 0
    
    func body(content: Content) -> some View {
        content
            .padding(.bottom, keyboardHeight)
            .onAppear(perform: subscribeToKeyboardEvents)
            .onDisappear(perform: unsubscribeFromKeyboardEvents)
    }
    
    private func subscribeToKeyboardEvents() {
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(keyboardWillShow),
            name: UIResponder.keyboardWillShowNotification,
            object: nil
        )
        
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(keyboardWillHide),
            name: UIResponder.keyboardWillHideNotification,
            object: nil
        )
    }
    
    private func unsubscribeFromKeyboardEvents() {
        NotificationCenter.default.removeObserver(
            self,
            name: UIResponder.keyboardWillShowNotification,
            object: nil
        )
        
        NotificationCenter.default.removeObserver(
            self,
            name: UIResponder.keyboardWillHideNotification,
            object: nil
        )
    }
    
    @objc private func keyboardWillShow(notification: Notification) {
        guard let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else {
            return
        }
        
        withAnimation {
            keyboardHeight = keyboardFrame.height
        }
    }
    
    @objc private func keyboardWillHide(notification: Notification) {
        withAnimation {
            keyboardHeight = 0
        }
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            // 其他视图组件
            
            Picker("选择器", selection: $selection) {
                // 选项
            }
            .pickerStyle(.segmented)
            .padding()
        }
        .modifier(HideKeyboard())
    }
}