在SwiftUI 3.0 iOS15中使用键盘显示调整视图向上

import SwiftUI
import Combine
import UIKit

class KeyboardResponder: ObservableObject {
    private var cancellable: AnyCancellable?
    @Published private(set) var keyboardHeight: CGFloat = 0

    init() {
        cancellable = NotificationCenter.default.publisher(for: UIResponder.keyboardWillChangeFrameNotification)
            .compactMap { notification in
                guard let frame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else {
                    return nil
                }
                return frame.height
            }
            .sink { [weak self] height in
                self?.keyboardHeight = height
            }
    }
}

struct ContentView: View {
    @ObservedObject private var keyboard = KeyboardResponder()

    var body: some View {
        VStack {
            // 在此处放置你的视图元素

        }
        .padding()
        .offset(y: -keyboard.keyboardHeight / 2) // 调整视图位置
    }
}