高亮显示PDF文档

import { pdfService, PdfView, pdfViewManager } from '@kit.PDFKit';
// ...

@Entry
@Component
struct HighlightPage {
  private controller: pdfViewManager.PdfController = new pdfViewManager.PdfController();
  private context = this.getUIContext().getHostContext() as Context;
  private loadResult: pdfService.ParseResult = pdfService.ParseResult.PARSE_ERROR_FORMAT;

  aboutToAppear(): void {
    // 确保在工程目录src/main/resources/resfile里存在input.pdf文档
    let filePath = this.context.resourceDir + '/input.pdf';
    (async () => {
      this.loadResult = await this.controller.loadDocument(filePath);
    })()
  }

  build() {
    // ...
      Column() {
        Row() {
          // 设置文本的高亮显示风格
          Button('setHighlightText').onClick(async () => {
            if (this.loadResult === pdfService.ParseResult.PARSE_SUCCESS) {
              this.controller.setHighlightText(0, ['PDF'], 0xAAF9CC00);
            }
          })
        }
        // 加载PdfView组件进行预览
        PdfView({
          controller: this.controller,
          pageFit: pdfService.PageFit.FIT_WIDTH,
          showScroll: true
        })
          .id('pdfview_app_view')
          .layoutWeight(1);
      }
      // ...
    .width('100%').height('100%')
  }
}