The method 'RaisedButton' isn't defined for the type 'MyApp'. (Documentation)

Question

flutter 报错： The method 'RaisedButton' isn't defined for the type 'MyApp'. (Documentation)

Answer 1

该报错表明你的代码中使用RaisedButton的方法未定义。你需要在MyApp类中定义RaisedButton方法，然后再次尝试运行flutter。