HarmonyOS 鸿蒙Next 在ArkUI中如何处理组件的触摸事件和手势识别

补充个demo

// xxx.ets
[@Entry](/user/Entry)
[@Component](/user/Component)
struct Index {
  [@State](/user/State) offsetX: number = 0;
  [@State](/user/State) offsetY: number = 0;
  [@State](/user/State) count: number = 0;
  [@State](/user/State) positionX: number = 0;
  [@State](/user/State) positionY: number = 0;
  [@State](/user/State) borderStyles: BorderStyle = BorderStyle.Solid
build() {
Column() {
Text(‘sequence gesture\n’ + ‘LongPress onAction:’ + this.count + '\nPanGesture offset:\nX: ’ + this.offsetX + ‘\n’ + 'Y: ’ + this.offsetY)
.fontSize(28)
}
// 绑定translate属性可以实现组件的位置移动
.translate({ x: this.offsetX, y: this.offsetY, z: 0 })
.height(250)
.width(300)
//以下组合手势为顺序识别，当长按手势事件未正常触发时不会触发拖动手势事件
.gesture(
// 声明该组合手势的类型为Sequence类型
GestureGroup(GestureMode.Sequence,
// 该组合手势第一个触发的手势为长按手势，且长按手势可多次响应
LongPressGesture({ repeat: true })
// 当长按手势识别成功，增加Text组件上显示的count次数
.onAction((event: GestureEvent|undefined) => {
if(event){
if (event.repeat) {
this.count++;
}
}
console.info(‘LongPress onAction’);
})
.onActionEnd(() => {
console.info(‘LongPress end’);
}),
// 当长按之后进行拖动，PanGesture手势被触发
PanGesture()
.onActionStart(() => {
this.borderStyles = BorderStyle.Dashed;
console.info(‘pan start’);
})
// 当该手势被触发时，根据回调获得拖动的距离，修改该组件的位移距离从而实现组件的移动
.onActionUpdate((event: GestureEvent|undefined) => {
if(event){
this.offsetX = this.positionX + event.offsetX;
this.offsetY = this.positionY + event.offsetY;
}
console.info(‘pan update’);
})
.onActionEnd(() => {
this.positionX = this.offsetX;
this.positionY = this.offsetY;
this.borderStyles = BorderStyle.Solid;
})
)
)
}
}