在SwiftUI中制作聊天应用程序:如何让ScrollView在键盘出现时保持其位置？

@State private var isKeyboardVisible = false

.onAppear {
    NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { notification in
        // 键盘即将出现时的操作
        self.isKeyboardVisible = true
    }
    
    NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: .main) { notification in
        // 键盘即将消失时的操作
        self.isKeyboardVisible = false
    }
}
.onDisappear {
    NotificationCenter.default.removeObserver(self)
}

GeometryReader { geometry in
    VStack {
        ScrollView {
            // 聊天消息列表
        }
        .padding()
        .frame(height: self.calculateScrollViewHeight(with: geometry))
        
        // 输入框或其他视图
    }
}

.onChange(of: isKeyboardVisible) { isKeyboardVisible in
    if isKeyboardVisible {
        // 键盘出现时的操作
        // 滚动ScrollView
    }
}