#鸿蒙通关秘籍#如何在HarmonyOS中使用@Watch装饰器监听状态变量变化？

@Component
struct WatchComponent {
  @State currentValue: number = 0
  @Watch('onValueChanged') observedValue: number = 0

  onValueChanged(propName: string): void {
    console.log(`Value changed: ${propName}`)
    this.currentValue += this.observedValue
  }

  build() {
    Column() {
      Button('Increment ObservedValue')
        .onClick(() => {
          this.observedValue++
        })
      Text(`Current Value: ${this.currentValue}`)
    }
  }
}
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