在swiftui中滚动时设置标题动画

import SwiftUI
import Combine

struct ContentView: View {
    @State private var offset: CGFloat = 0
    
    var body: some View {
        ScrollView {
            VStack {
                ForEach(1...100, id: \.self) { index in
                    Text("Row \(index)")
                        .font(.title)
                        .padding()
                }
            }
            .offset(y: offset)
            .animation(.default)
            .onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
                withAnimation {
                    self.offset = 0
                }
            }
            .onReceive(NotificationCenter.default.publisher(for: UIApplication.willResignActiveNotification)) { _ in
                withAnimation {
                    self.offset = 0
                }
            }
            .onReceive(NotificationCenter.default.publisher(for: UIApplication.userDidTakeScreenshotNotification)) { _ in
                withAnimation {
                    self.offset = 0
                }
            }
            .onAppear {
                NotificationCenter.default.addObserver(forName: UIScrollView.keyboardDidScrollNotification, object: nil, queue: .main) { _ in
                    self.offset = -self.getKeyboardHeight()
                }
            }
        }
    }
    
    private func getKeyboardHeight() -> CGFloat {
        UIApplication.shared.windows.first { $0.isKeyWindow }?.safeAreaInsets.bottom ?? 0
    }
}

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