我正在构建Flutter应用程序,当该应用程序启动时,我想将用户发送到登录页面(如果尚未登录)或仪表板页面(如果已登录)。
基本上,main()只是代码,没有小部件。我该怎么办?
我在想类似的东西:
import 'package:flutter/material.dart';
void main() {
runApp(new MaterialApp(
home: new StarterPoint()
));
}
class StarterPoint extends StatelessWidget {
final bool loggedIn = false;
if (loggedIn) {
Navigator.push(
MaterialPageRoute(builder: (context) => Dashboard()),
);
} else {
Navigator.push(
MaterialPageRoute(builder: (context) => Login()),
);
}
}
答案 0 :(得分:0)
这是您可以做什么的简单示例。我认为您需要根据是否登录来跟踪StarterPoint中的状态。
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(home: StarterPoint()));
}
class StarterPoint extends StatefulWidget {
@override
State<StatefulWidget> createState() => StarterPointState();
}
class StarterPointState extends State<StarterPoint> {
bool loggedIn = false;
@override
Widget build(BuildContext context) {
if (loggedIn) {
return Dashboard();
} else {
return Login(() => setState(() {
loggedIn = true;
}));
}
}
}
class Dashboard extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Text('hello!');
}
}
class Login extends StatelessWidget {
final Function() callBack;
Login(this.callBack);
@override
Widget build(BuildContext context) {
return Column(children: [
RaisedButton(child: Text('press'), onPressed: () => callBack())
]);
}
}