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login_page.dart
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login_page.dart
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import 'package:flutetr_du_app/provider/login_provider.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
class LoginPage extends StatelessWidget {
const LoginPage({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[BgMainPic(), BgOtherPic()],
fit: StackFit.expand,
),
);
}
}
// 这个其实就是当前显示的,随时准备被替换掉,就像男女朋友一样
class BgMainPic extends StatelessWidget {
const BgMainPic({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
LoginProvider provider = Provider.of<LoginProvider>(context);
return Opacity(
opacity: provider.mainPicOp,
child: Image.asset(
'lib/images/login_bg${provider.mainPicIndex + 1}.jpeg',
fit: BoxFit.cover,
),
);
}
}
class BgOtherPic extends StatelessWidget {
const BgOtherPic({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
LoginProvider provider = Provider.of<LoginProvider>(context);
return Opacity(
opacity: provider.otherPicOp,
child: Image.asset(
'lib/images/login_bg${provider.otherPicIndex + 1}.jpeg',
fit: BoxFit.cover,
),
);
}
}