swiftui将视图带到中心，并在长按后模糊背景，如消息应用程序

import SwiftUI

struct ContentView: View {
    @GestureState private var isLongPressing = false

    var body: some View {
        ZStack {
            // 背景视图
            Image("background")
                .blur(radius: isLongPressing ? 10 : 0) // 根据手势状态设置模糊效果

            // 中心视图
            VStack {
                Text("Hello, SwiftUI!")
                    .font(.largeTitle)
                    .foregroundColor(.white)
                    .padding()
                    .background(Color.blue)
                    .cornerRadius(10)
                    .scaleEffect(isLongPressing ? 1.5 : 1) // 根据手势状态设置缩放效果
                    .animation(.easeInOut) // 添加动画效果
            }
            .frame(width: 300, height: 200)
            .background(Color.black.opacity(0.5))
            .cornerRadius(20)
            .gesture(
                LongPressGesture(minimumDuration: 1)
                    .updating($isLongPressing) { currentState, gestureState, transaction in
                        gestureState = currentState
                    }
            )
        }
    }
}

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