当键盘出现时，滚动到SwiftUI滚动视图的最底部

ScrollView {
    // 添加需要滚动的内容
}

TextField("请输入内容", text: $text)

.onAppear {
    NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { notification in
        // 键盘出现时的处理逻辑
    }
}
.onDisappear {
    NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
}

let keyboardHeight = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGFloat ?? 0
ScrollViewReader { scrollViewProxy in
    scrollViewProxy.scrollTo(scrollViewProxy.selectedId, anchor: .bottom)
}

import SwiftUI

struct ContentView: View {
    @State private var text: String = ""
    
    var body: some View {
        ScrollView {
            VStack {
                ForEach(1...20, id: \.self) { index in
                    Text("Item \(index)")
                        .padding()
                }
                
                TextField("请输入内容", text: $text)
                    .padding()
                    .textFieldStyle(RoundedBorderTextFieldStyle())
            }
        }
        .onAppear {
            NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: .main) { notification in
                let keyboardHeight = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGFloat ?? 0
                ScrollViewReader { scrollViewProxy in
                    scrollViewProxy.scrollTo(scrollViewProxy.selectedId, anchor: .bottom)
                }
            }
        }
        .onDisappear {
            NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}