Flutter StatelessWidget

void main() {
//  runApp(_appRouteName(window.defaultRouteName));
  runApp(MaterialApp(
    home: TempPage(),
  )
  );
}

class TempPage extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    print('这里会走两次为什么');
    return Container();
  }
}

https://www.jianshu.com/p/3cc0c2def194