image - Flutter中带有SvgPicture的precacheImage

Question

如何将precacheImage()与SvgPicture包中的flutter_svg: 0.17.4一起使用？

我想在后台加载svg图片

  Container _graphicSection() {
    final String graphic = 'assets/graphic/two_people.svg';
    return Container(
        child: Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      mainAxisSize: MainAxisSize.max,
      mainAxisAlignment: MainAxisAlignment.start,
      children: <Widget>[
        SvgPicture.asset(
          graphic,
          height: 150,
          alignment: Alignment.center,
        )
      ],
    ));
  }

有谁知道如何使用precachImage()函数加载svg图片？

Answer 1

flutter_svg now has a function called precachePicture() and you can use it like this:

Future<void> loadPictures() async {
  await precachePicture(
    ExactAssetPicture(SvgPicture.svgStringDecoder, 'assets/graphic/two_people.svg'),
    context,
  ); //here context can also be null    
}