#鸿蒙通关秘籍#如何使用@Provide和@Consume实现ArkTS中的跨层级参数传递？

// 父组件
@Entry
@Component
struct Parent {
  @Provide('weight') weight: number = 50

  build() {
    Column({ space: 20 }) {
      Text(`父组件体重值：${this.weight}`)
      Button(`父组件体重+1`).onClick(() => {
        this.weight++
      })
      Child()
    }.padding(20).alignItems(HorizontalAlign.Start)
  }
}

// 子组件
@Component
struct Child {
  build() {
    Grandson()
  }
}

// 孙组件
@Component
struct Grandson {
  @Consume('weight') weight: number

  build() {
    Column({ space: 20 }) {
      Text(`孙组件体重值：${this.weight}`)
      Button(`孙组件体重+1`).onClick(() => {
        this.weight++
      })
    }.margin({ top: 50 })
  }
}
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