SwiftUI—如何给视图添加长按手势

struct ContentView : View {
    @GestureState var isLongPressed = false //用于刷新长按手势的状态
    var body: some View {
        let longPressGesture = LongPressGesture() //初始化一个长按手势，该手势一旦识别到长按的触摸状态，就会调用手势的结束事件。您甚至可以限制长按手势的时间长度
            .updating($isLongPressed) { value, state, transcation in //通过调用updating方法，监听手势状态的变化
                print(value, state, transcation)
                state = value
            }
            .onEnded { (value) in
                print(value)
            }
        return Circle()
            .fill(Color.orange)
            .frame(width: 240, height: 240)
            .gesture(longPressGesture)
            .scaleEffect(isLongPressed ? 1.4 : 1)
            .animation(.default)
    }
}