HarmonyOS线程池周期执行任务

@Entry 
@Component 
struct Time { 
build() { 
  Column() { 
    Button("点击") 
      .onClick(() => { 
        this.a() 
      }) 
  }.width('100%') 
  .height('100%') 
} 
​ 
a() { 
  console.log("taoyusheng111"); 
  setTimeout(() => { 
    this.a() 
  }, 1000); 
} 
}