HarmonyOS 如何使用Canvas画扇形

参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-canvasrenderingcontext2d-V5

参考示例：

@Entry
@Component
struct Page {
  private settings: RenderingContextSettings = new RenderingContextSettings(true)
  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings)

  build() {
    Column() {
      Canvas(this.context)
        .width('100%')
        .height('100%')
        .backgroundColor('#F5DC62')
        .onReady(() => {
          this.context.beginPath();
          this.context.moveTo(150, 150)
          this.context.arc(150, 150, 100, Math.PI / 2, Math.PI);
          this.context.lineTo(150, 150)
          this.context.stroke();
        })
    }
  }
}