[移动开发]Flutter 引入三方库Flutter Cupertino Date Picker出错问题处理

rror: Type 'DiagnosticableMixin' not found.

class DateTimePickerTheme with DiagnosticableMixin {

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?^^^^^^^^^^^^^^^^^^^

/D:/flutter_sdk/flutter/.pub-cache/hosted/pub.flutter-io.cn/flutter_cupertino_date_picker-1.0.26+2/lib/src/date_picker_theme.dart:23:7: Error: The type 'DiagnosticableMixin' can't be mixed in.

class DateTimePickerTheme with DiagnosticableMixin {

? ? ? ^

/D:/flutter_sdk/flutter/.pub-cache/hosted/pub.flutter-io.cn/flutter_cupertino_date_picker-1.0.26+2/lib/src/date_picker.dart:103:34: Error: No named parameter with the name 'shadowThemeOnly'.

? ? ? ? theme: Theme.of(context, shadowThemeOnly: true),

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?^^^^^^^^^^^^^^^

解决方法:?

1.在lib/src/date_picker_theme.dart中找到DateTimePickerTheme类
2.将继承的DiagnosticableMixin 类替换为 Diagnosticable类

3.在 flutter_cupertino_date_picker-1.0.26+2\lib\src 文件内找到 shadowThemeOnly ，注释掉
4. theme: Theme.of(context, /* shadowThemeOnly: true*/),