开源鸿蒙 @Styles

2022-08-09
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@Styles

The @Styles decorator adds new attribute functions to basic components, such as <Text>, <Column>, and <Button>. Currently, @Styles supports only universal attributes. You can use the @Styles decorator to quickly define and reuse the custom styles of a component.

@Styles can be defined inside or outside a component. When it is defined outside a component, the keyword function must be included.

@Styles function globalFancy() {
  .backgroundColor(Color.Red)
}

@Entry
@Component
struct FancyUse {
  @Styles componentFancy() {
    .backgroundColor(Color.Blue)
  }
  build() {
    Column({ space: 10 }) {
      Text("Fancy")
        .globalFancy()
        .width(100)
        .height(100)
        .fontSize(30)
      Text("Fancy")
        .componentFancy()
        .width(100)
        .height(100)
        .fontSize(30)
    }
  }
}

@Styles can also be used inside the StateStyles attribute to assign state-specific attributes to components.

In StateStyles, styles defined outside the component can be directly called. However, the keyword this must be used to call styles defined in the component.

@Styles function globalFancy() {
  .width(100)
  .height(100)
}

@Entry
@Component
struct FancyUse {
  @Styles componentFancy() {
    .width(50)
    .height(50)
  }
  build() {
    Row({ space: 10 }) {
      Button() {
      	Text("Fancy")
      }
      .stateStyles({
      	normal: {
      	  .width(80)
      	  .height(80)
      	},
      	disabled: this.componentFancy,
      	pressed: globalFancy
      })
    }
  }
}