Widget _actionImageViewer(BuildContext context) {
    var delImages = [
      'https://tdesign.gtimg.com/mobile/demos/swiper1.png',
      'https://tdesign.gtimg.com/mobile/demos/swiper2.png',
    ];
    return TDButton(
      type: TDButtonType.ghost,
      theme: TDButtonTheme.primary,
      isBlock: true,
      size: TDButtonSize.large,
      text: '带操作图片预览',
      onTap: () {
        TDImageViewer.showImageViewer(
          context: context,
          images: delImages,
          showIndex: true,
          deleteBtn: true,
        );
      },
    );
  }