HarmonyOS 鸿蒙Next 父组件调用子组件方法及该特性后续演进计划

父组件调用子组件的方法参考以下代码：

[@Component](/user/Component)
struct Child {
  [@State](/user/State) private text: string = '初始值'
  private controller: ChildController = new ChildController();
aboutToAppear() {
if (this.controller) {
this.controller.changeText = this.changeText
}
console.log(‘aaa’)
}
private changeText = (value: string) => {
this.text = value
console.log(‘bbb’)
}
build() {
Column() {
Text(this.text)
}
}
}
class ChildController {
changeText = (value: string) => {
console.log(‘11111’)
}
}
export let ChildRef = new ChildController()
@Entry
@Component
struct Parent {
// ChildRef = new ChildController()
@State noShow: boolean = false
build() {
Column() {
Text(‘获取Child的exposeMethods!’).fontSize(‘18vp’).fontColor(Color.Gray)
Divider()
Child({ controller: ChildRef })
Child()
Button(‘Parent调用childer的changeText’).onClick(() => {
ChildRef.changeText(‘Parent调用childer的changeText’)
})
}
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>