//代码块 importM
import 'package:flutter/material.dart';
void main() {
runApp(
MaterialApp(
theme: ThemeData(
primarySwatch: Colors.yellow //导航栏颜色
),
home: Scaffold(
appBar: AppBar(title: const Text("这是导航栏", textDirection: TextDirection.rtl)),
body: const MyApp()
))
);
}
//在Flutter中自定义组件其实就是一个类,这个类需要继承StatelessWidget/StatefulWidget
//代码块 statelessW
class MyApp extends StatelessWidget{
const MyApp({super.key});
@override
Widget build(BuildContext context) {
// TODO: implement build
return const Center(
child: Text(
"你好flutter 我是一个自定义的主键",
textDirection: TextDirection.ltr,
style: TextStyle(
// color: Colors.red
color: Color.fromRGBO(190, 190, 34, 1),
fontSize: 40.0),
),
);
}
}