出现情景

在使用flutter packages pub run build_runner buildJSON序列化出现冲突生,无法生成.g.dart文件.

[INFO] Checking for unexpected pre-existing outputs....
[INFO] Found 36 declared outputs which already exist on disk. This is likely because the`.dart_tool/build` folder was deleted, or you are submitting generated files to your source repository.
[SEVERE] Conflicting outputs were detected and the build is unable to prompt for permission to remove them. These outputs must be removed manually or the build can be run with `--delete-conflicting-o
utputs`. The outputs are: lib/data/http/rsp/UserInfoModel.g.dart
 
[INFO] Generating build script...

出现原因

运行flutter packages pub run build_runner build除了生成.g.dart文件.同时还会生成了一个dart_tool/build目录. 当再次生成新的.g.dart因为缺少之前生成dart_tool/build目下的文件就会报错.不过运行app是没有问题的,之前g.dart还可以用.

解决方法

flutter packages pub run build_runner clean

flutter packages pub run build_runner build --delete-conflicting-outputs