Compiler message:
../../../../DevelopmentEnvironment/Flutter/flutter/.pub-cache/hosted/pub.dartlang.org/cached_network_image-0.5.1/lib/cached_network_image.dart:461:24: Error: The method 'CachedNetworkImageProvider.load' has fewer positional arguments than those of overridden method 'ImageProvider.load'.
ImageStreamCompleter load(CachedNetworkImageProvider key) {
^
../../../../DevelopmentEnvironment/Flutter/flutter/packages/flutter/lib/src/painting/image_provider.dart:403:24: Context: This is the overridden method ('load').
ImageStreamCompleter load(T key, DecoderCallback decode);
^
解决方案：
在 pubspec.yaml 中升级 cached_network_image 到 cached_network_image: 2.0.0-rc.1。
