实现多行文本渐变,Text实现多行文本渐变

@Entry 
@Component 
struct Page240126155113078 { 
@State message: string = '文本文本文本文本文本'; 
@State playLine: number = 1 
​ 
build() { 
  Row() { 
    Column() { 
      TextGradient({ message: this.message, playMode: this.playLine, line: 1 }) 
      TextGradient({ message: this.message, playMode: this.playLine, line: 2 }) 
      TextGradient({ message: this.message, playMode: this.playLine, line: 3 }) 
    } 
    .width('100%') 
  } 
  .height('100%') 
} 
} 
​ 
@Component 
struct TextGradient { 
@State message: string = 'Hello World'; 
@State value: number = 0.0 
@Link @Watch("playModeWatch") playMode: number 
@Prop line: number 
private intervalId: number | null = null 
​ 
playModeWatch() { 
  if (this.playMode === this.line) { 
    this.intervalId = setInterval(() => { 
      this.value = parseFloat((this.value + 0.01).toFixed(2)) 
      if (this.value == 1) { 
        clearInterval(this.intervalId) 
        this.intervalId = null 
        this.playMode++ 
      } 
    }, 100) 
  } 
} 
​ 
aboutToAppear(): void { 
  if (this.playMode === this.line) { 
    this.intervalId = setInterval(() => { 
      this.value = parseFloat((this.value + 0.01).toFixed(2)) 
      if (this.value == 1) { 
        clearInterval(this.intervalId) 
        this.intervalId = null 
        this.playMode++ 
      } 
    }, 100) 
  } 
} 
​ 
build() { 
  Row() { 
    Text(this.message) 
      .fontSize(32) 
      .fontColor(Color.Black) 
      .fontWeight(FontWeight.Bold) 
      .blendMode(BlendMode.DST_IN, BlendApplyType.OFFSCREEN) 
  }.linearGradient({ 
    direction: GradientDirection.Right, 
    colors: [[0xff0000, 0.0], [0xff0000, this.value], [0x000000, this.value], [0x000000, 1.0]] 
  }).blendMode(BlendMode.SRC_OVER, BlendApplyType.OFFSCREEN) 
  .backgroundImageSize({ width: 0, height: 0 }) 
} 
}