HarmonyOS 鸿蒙Next手势抽离问题

在鸿蒙开发中，对于大量的组合手势操作。我想要将其抽离出来成一个属性值。但是我发现当我抽离出来的时候，app编译失败，报错为

Error message:Cannot read property onActionStart of undefined。

个人猜测原因是因为手势实例时需要一定的UI 环境

代码如下

@Entry
@ComponentV2
struct Index {
@Local offsetX: number = 0
@Local offsetY: number = 0
@Local positionX: number = 0
@Local positionY: number = 0

private myGesture:  GestureType = PanGesture()
.onActionStart((event: GestureEvent | undefined) => {
console.log(“dubug”)
})
.onActionUpdate((event: GestureEvent | undefined) => {
if (event) {
console.info(“触发，offsetX:”,this.offsetX,“offsetY:”,this.offsetY)
this.offsetX = this.positionX + event.offsetX
this.offsetY = this.positionY + event.offsetY
}
})
.onActionEnd((event: GestureEvent | undefined) => {
console.log(“结束”)
this.positionX = this.offsetX
this.positionY = this.offsetY
})
build() {
Column() {
Row() {
Image($r(‘app.media.avatar’))
.translate({
x: this.offsetX,
y: this.offsetY
})
.gesture(this.myGesture)
}
}
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>

因此我将其封装成了一个回调函数，并在获取手势参数时运行回调函数获取手势

代码逻辑大致如下:

@Entry
@ComponentV2
struct Index {
@Local offsetX: number = 0
@Local offsetY: number = 0
@Local positionX: number = 0
@Local positionY: number = 0

private myGesture:  ()=>GestureType = ()=>PanGesture()
.onActionStart((event: GestureEvent | undefined) => {
console.log(“dubug”)
})
.onActionUpdate((event: GestureEvent | undefined) => {
if (event) {
console.info(“触发，offsetX:”,this.offsetX,“offsetY:”,this.offsetY)
this.offsetX = this.positionX + event.offsetX
this.offsetY = this.positionY + event.offsetY
}
})
.onActionEnd((event: GestureEvent | undefined) => {
console.log(“结束”)
this.positionX = this.offsetX
this.positionY = this.offsetY
})
build() {
Column() {
Row() {
Image($r(‘app.media.avatar’))
.translate({
x: this.offsetX,
y: this.offsetY
})
.gesture(this.myGesture())
}
}
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>

编译能够成功，但效果不生效。我已确认我的手势设置没有问题，但很疑惑鸿蒙在这一块的封装逻辑