页面导航 ​

await controller.setDisplayPageIndex(pageIndex);

int currentPageIndex = await _controller.getCurrentPageIndex();

CPDFReaderWidget(
  document: widget.documentPath,
  configuration: CPDFConfiguration(),
  onCreated: (controller) {

  },
  onPageChanged: (pageIndex){
    debugPrint('当前页码: ${pageIndex}');
  },
)