未為類型“CustomButton”定義方法“RaisedButton” [英]The method 'RaisedButton' isn't defined for the type 'CustomButton'
"沒有為“FadeAnimation”類型定義方法“MultiTrackTween”" [英]The method 'MultiTrackTween' isn't defined for the type 'FadeAnimation'
flutter 突然報錯命名參數child isnt defined [英]flutter error all of a sudden the named parameter child isnt defined
沒有為 flutter 中的 class 'TextTheme' 定義 getter 'bodyText2' [英]The getter 'bodyText2' isn't defined for the class 'TextTheme' in flutter