怎么让按钮在没响应之前保持按压的状态？

@Entry
@Component
struct ClickTest {
  @State num: number = 0;
  @State clickable: boolean = true

  build() {
    Row() {
      Column() {
        Button(this.num.toString()).onClick(() => {
          this.clickable = false
          console.info("两秒前")
          setTimeout(() => {
            console.info("两秒后")
            this.num++;
            this.clickable = true
          }, 2000);
        })
          .enabled(this.clickable)
          .width("20%")
      }
      .width('100%')
    }
    .height('100%')
  }
}