当键盘出现时，简单的SwiftUI背景图像会一直移动

import SwiftUI

struct ContentView: View {
    @State private var keyboardHeight: CGFloat = 0
    
    var body: some View {
        ZStack {
            // 背景图像
            Image("background")
                .resizable()
                .scaledToFill()
                .edgesIgnoringSafeArea(.all)
            
            // 其他视图元素
            // ...
        }
        .padding(.bottom, keyboardHeight)
        .onAppear {
            NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { notification in
                let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect
                self.keyboardHeight = keyboardFrame?.height ?? 0
            }
            
            NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: .main) { _ in
                self.keyboardHeight = 0
            }
        }
        .onDisappear {
            NotificationCenter.default.removeObserver(self)
        }
    }
}