在MaterialApp初始化的时候，设置
debugShowCheckedModeBanner:false即可。
void main(){
runApp(new MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => new _MyAppState();
}
class _MyAppState extends State<MyApp> {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: new Text('My Application'),
debugShowCheckedModeBanner: false, // 设置这一属性即可
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new SplashScreen(),
routes: <String, WidgetBuilder> {
'/splashscreen': (BuildContext context) => new SplashScreen(),
'/conditions': (BuildContext context) => new TermsAndConditionsPage(),
},
);
}
}
