loadImageByProvider static method
Future<Image>
loadImageByProvider(
- ImageProvider<
Object> provider, { - ImageConfiguration config = ImageConfiguration.empty,
Implementation
static Future<ui.Image> loadImageByProvider(
ImageProvider provider, {
ImageConfiguration config = ImageConfiguration.empty,
}) async {
Completer<ui.Image> completer = Completer<ui.Image>(); //完成的回调
ImageStream stream = provider.resolve(config); //获取图片流
late ImageStreamListener listener; //监听
listener = ImageStreamListener((ImageInfo imageInfo, bool sync) {
final ui.Image image = imageInfo.image;
completer.complete(image); //完成
stream.removeListener(listener); //移除监听
});
stream.addListener(listener); //添加监听
return completer.future; //返回
}