定义父子组件，父组件如何获取子组件的事件

class Model {
  value: string = ''
}

@Entry
@Component
struct EntryComponent {
  test() {
    console.log('testTag test in my component');
  }

  build() {
    Column() {
      MyComponent({ title: { value: 'Hello World 2' },
        count: 7,
初始化时传递定义的方法
    }
  }
}

@Component
struct MyComponent {
  @State title: Model = { value: 'Hello World' }
  @State count: number = 0
  click: () => void = () => {
  };
  private toggle: string = 'Hello World'
  private increaseBy: number = 1

  build() {
    Column() {
      Text(`${this.title.value}`).fontSize(30)
      Button(`Click to increase count=${this.count}`)
        .margin(20)
        .onClick(() => {
修改内部状态变量count
          this.count += this.increaseBy
          this.click();
        })
    }
  }
}
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