Flutter 按下“颤振后退”按钮
WillPopScope不会在我的android后退按钮设备上做出反应，但它会在颤振箭头上做出反应。有人知道怎么解决这个问题吗Flutter 按下“颤振后退”按钮,flutter,Flutter,WillPopScope不会在我的android后退按钮设备上做出反应，但它会在颤振箭头上做出反应。有人知道怎么解决这个问题吗 class DetailScreen extends StatelessWidget { final Property property; const DetailScreen(this.property); return WillPopScope( onWillPop: () { _goToProjects(context); }, chil
class DetailScreen extends StatelessWidget {
final Property property;
const DetailScreen(this.property);
return WillPopScope(
onWillPop: () {
_goToProjects(context);
},
child: ScopedModelDescendant<PropertyScopedModel>(
builder: (context, child, model) => Scaffold(
backgroundColor: Color(0xff253138),
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
leading: IconButton(icon: Icon(Icons.arrow_back), onPressed: () {_goToProjects(context);} ),
pinned: true,
floating: false,
title: Text('Project titel')),
SliverList(
delegate: SliverChildListDelegate([
Container(
color: Color(0xff2f3e47),
padding: const EdgeInsets.all(16),
margin: const EdgeInsets.symmetric(vertical: 2.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: Text(
"INTERN",
overflow: TextOverflow.ellipsis,
style: TextStyle(
color: Colors.green,
fontWeight: FontWeight.bold),
),
),
Chip(
backgroundColor: Colors.green.shade800,
labelStyle: TextStyle(color: Colors.white),
label: Text('In planning'),
)
],
),
SizedBox(
height: 10,
),
Text(
"Project titel",
style: TextStyle(
color: Colors.white, fontWeight: FontWeight.bold),
),
SizedBox(
height: 10,
),
Text(
property.summary,
style: Theme.of(context).textTheme.body2,
),
],
),
),
Container(
color: Color(0xff2f3e47),
margin: const EdgeInsets.symmetric(vertical: 2.0),
padding: const EdgeInsets.all(8),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Align(
alignment: Alignment.center,
child: Container(
child: Text("",
style: TextStyle(
color: Colors.blue, fontSize: 16))),
),
ListTile(
leading: Icon(Icons.pin_drop, color: Colors.white),
title: Text("",
style: TextStyle(fontSize: 14)),
subtitle: Text("",
style: TextStyle(fontSize: 14)),
onTap: () {
_launchMaps();
},
),
ListTile(
leading: Icon(Icons.local_phone, color: Colors.white),
title: Text('',
style:
TextStyle(color: Colors.blue, fontSize: 14)),
onTap: () => launch(""),
),
ListTile(
leading: Icon(Icons.mail, color: Colors.white),
title: Text('',
style: TextStyle(fontSize: 14)),
onTap: () {
_launchMail();
},
),
ListTile(
leading: Icon(Icons.web, color: Colors.white),
title: Text(
'',
style: TextStyle(color: Colors.blue, fontSize: 14),
),
onTap: () {
_launchURL();
},
),
],
),
),
Container(
margin: const EdgeInsets.symmetric(vertical: 2.0),
),
Container(
color: Color(0xff2f3e47),
margin: const EdgeInsets.symmetric(vertical: 0.0),
padding: const EdgeInsets.all(12),
child: Row(
children: <Widget>[
Text(
"Taken",
style: Theme.of(context)
.textTheme
.title
.copyWith(fontSize: 20.0),
),
],
),
),
InkWell(
onTap: () {
print('test');
},
child: Container(
color: Color(0xff2f3e47),
child: Row(
children: <Widget>[
Expanded(
child: Container(
padding: const EdgeInsets.all(12.0),
child: Column(
mainAxisAlignment:
MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Divider(height: 3, color: Color(0xff253138),),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Text('', style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold), ),
Text('12-02-2019'),
],
),
SizedBox(
height: 10,
),
Row(
children: <Widget>[
Expanded(
child: Text(
property.summary,
style: Theme.of(context)
.textTheme
.body2,
),
),
Chip(
backgroundColor:
Colors.green.shade800,
label: Text('In planning'),
)
],
),
Divider(height: 3, color: Colors.red,),
],
),
),
),
],
),
),
),
Container(
margin: const EdgeInsets.symmetric(vertical: 2.0),
),
Container(
color: Color(0xff2f3e47),
margin: const EdgeInsets.symmetric(vertical: 2.0),
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(bottom: 8.0),
child: Text(
"Lister",
style: Theme.of(context)
.textTheme
.title
.copyWith(fontSize: 20.0),
),
),
ListTile(
leading: Icon(Icons.account_circle),
title:
Text("${property?.listerName ?? "unavailable"}"),
subtitle: Text(
"${property?.datasourceName ?? "source unavailable"}"),
),
],
),
),
]))
],
),
floatingActionButton: AnimatedFloatingActionButton(
//Fab list
fabButtons: <Widget>[float1(), float2(), float3()],
colorStartAnimation: Color(0xff0f70b7),
colorEndAnimation: Colors.red,
animatedIconData: AnimatedIcons.menu_close //To principal button
),
),
),
);
}
}
提前感谢Willposcope是一个StatefulWidget小部件。因此，将DetailScreen类转换为StatefulWidget类 无论您在何处拥有property.summary，都将其更改为widget.property.summary，然后重试 在项目中更改此代码：
class DetailScreen extends StatefulWidget {
final Property property;
DetailScreen({Key key, this.property}) : super(key: key);
@override
DetailScreenState createState() {
return DetailScreenState();
}
}
class DetailScreenState extends State<DetailScreen> {
Future<bool> _goToProjects() {
print('test');
return Navigator.push(
context, MaterialPageRoute(builder: (context) => GetProjects()));
}
return WillPopScope(
onWillPop: _goToProjects,
child: ScopedModelDescendant<PropertyScopedModel>(
...
Text(
"Project titel",
style: TextStyle(
color: Colors.white, fontWeight: FontWeight.bold),
),
SizedBox(
height: 10,
),
Text(
widget.property.summary,
style: Theme.of(context).textTheme.body2,
),
... code
Row(
children: <Widget>[
Expanded(
child: Text(
widget.property.summary,
style: Theme.of(context)
.textTheme
.body2,
),
),
Chip(
backgroundColor:
Colors.green.shade800,
label: Text('In planning'),
)
],
),
..rest of your code
),
);
}
你在测试哪部手机？你也试过其他手机吗？@CopsOnRoad我试过我的安卓设备三星s8，我也试过NexusX5虚拟设备。两个都不起作用。我猜这是因为它周围的范围模型。但是我需要在我的代码中使用它来让我的东西正常工作；const detailscreen this.property；Detailscreen必须有一个方法体，因为DetailScreenState不是抽象的。解决了上面的评论，但仍然没有解决我的问题。其他人有主意了吗？我已经更新了上面的代码，如果这行得通或者不行，试试看DetailScreen上的键不起作用，只是const现在起作用了。我遇到的问题是ScopedModelSecondant必须是一个返回值。你对此有什么想法吗？还有构建器：上下文、子对象、模型{必须在其中。
class DetailScreen extends StatefulWidget {
final Property property;
DetailScreen({Key key, this.property}) : super(key: key);
@override
DetailScreenState createState() {
return DetailScreenState();
}
}
class DetailScreenState extends State<DetailScreen> {
Future<bool> _goToProjects() {
print('test');
return Navigator.push(
context, MaterialPageRoute(builder: (context) => GetProjects()));
}
return WillPopScope(
onWillPop: _goToProjects,
child: ScopedModelDescendant<PropertyScopedModel>(
...
Text(
"Project titel",
style: TextStyle(
color: Colors.white, fontWeight: FontWeight.bold),
),
SizedBox(
height: 10,
),
Text(
widget.property.summary,
style: Theme.of(context).textTheme.body2,
),
... code
Row(
children: <Widget>[
Expanded(
child: Text(
widget.property.summary,
style: Theme.of(context)
.textTheme
.body2,
),
),
Chip(
backgroundColor:
Colors.green.shade800,
label: Text('In planning'),
)
],
),
..rest of your code
),
);
}