我创建了一个带有底部表格和列表视图生成器的应用程序。在底部，有一个文本按钮，当我将其向上拖动时，底部表格必须出现。底页上有一张表格。我用 SingleChildScrollView 包裹底部纸张。但是当我单击 TextFormField 键盘时，我可以滚动底部工作表。但我无法将其向下拖动并关闭底部工作表。即使我按手机上的后退箭头来摆脱键盘。
import 'package:flutter/material.dart';
class Home extends StatefulWidget {
const Home({Key key}) : super(key: key);
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
@override
Widget build(BuildContext context) {
var width = MediaQuery.of(context).size.width;
return Scaffold(
resizeToAvoidBottomInset: false,
body: Stack(
children: [
ListView.builder(
itemCount: 1,
itemBuilder: (context, index) {
return Card(
);
}),
Positioned(
bottom: 0,
child: GestureDetector(
onPanEnd: (details) {
if (details.velocity.pixelsPerSecond.dy < 10) {
//Bottom Sheet.................................................................................................................
showModalBottomSheet(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(
top: Radius.circular(25)),
),
backgroundColor: Colors.green,
context: context,
builder: (context) {
return SingleChildScrollView(
child: Container(
padding: EdgeInsets.all(10),
child: Form(
child: Column(
children: [
Icon(Icons.arrow_drop_down),
Text("Drag down to Close"),
Container(
color: Colors.red,
child: Column(
children: [
Row(
children: [
Expanded(
child: TextFormField(
decoration: InputDecoration(
labelText: "Current amount",
),
),
),
],
),
Row(
children: [
Expanded(
child: TextButton(
onPressed: () {},
child: Text("Submit"))),
],
),
],
),
),
],
)),
),
);
});
// Bottom Sheet Ends ......................................................................................................................................................
}
},
child: Container(
color: Colors.blue,
width: width,
padding: EdgeInsets.all(10),
child: Column(
children: [
Icon(Icons.arrow_drop_up),
Text("Drag up to Enter an Account"),
],
),
),
),
)
]),
);
}
}
这可以分两步完成：
将
SingleChildScrollViewshowModalBottomSheet确保使用这些属性：
showModalBottomSheet(
enableDrag: true,
isScrollControlled: true,
// ...
);
此外，将
showModalBottomSheet这是一个完整的示例：
Widget openModalBottomSheet() {
Size size = MediaQuery.of(context).size;
showModalBottomSheet(
enableDrag: false,
isDismissible: false,
isScrollControlled: true,
context: context,
builder:(context)
{
return GestureDetector(
behavior: HitTestBehavior.opaque,
child: SingleChildScrollView(
child: Container(
padding: EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom+10),
// height: size.height*0.6,
decoration: BoxDecoration(
color: Colors.white,
),
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(25.0),
child: Container(
decoration: BoxDecoration(
//color: Colors.red,
borderRadius: BorderRadius.circular(20),
),
height: size.height*0.5,
width: double.infinity,
child: Card(
elevation: 4,
child: Padding(
padding: const EdgeInsets.all(12.0),
child: Form(
key: _formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
NameField(
name:sectionname,
controller: null,
icon: Icons.person,
hintText: "Please enter section name",
text: "you not enter Smaster",
onchanged: (value)
{
setState(() {
Administrative.instance.SectionName=value;
});
},
),
NameField(
controller:null,
name:smaster,
icon: Icons.vpn_key_outlined,
hintText: "Please enter Section Smaster",
text: "your enter empty Smaster",
onchanged: (value)
{
setState(() {
Administrative.instance.Smaster=value;
});
},
),
],
),
),
),
),
),
),
Padding(
padding: const EdgeInsets.only(left: 20.0,right: 20.0,top: 8.0,bottom: 8.0),
child: Container(
width: double.infinity,
height: 60,
child: FlatButton(
color: Colors.black,
onPressed: (){
if(!_formKey.currentState.validate()){
return;
}
else
{
_formKey.currentState.save();
// signupauth.instance.addstudent();
if(Administrative.instance.SectionName==null)
{
Administrative.instance.SectionName=sectionname;
}
else if(Administrative.instance.Smaster==null)
{
Administrative.instance.Smaster=smaster;
}
print("hello"+ids);
FirebaseFirestore.instance
.collection("Section")
.doc(ids).update({
"SectionName":Administrative.instance.SectionName,
"Smaster":Administrative.instance.Smaster,
});
Fluttertoast.showToast(
msg: "Section is added",
toastLength: Toast.LENGTH_LONG,
gravity: ToastGravity.CENTER,
timeInSecForIosWeb: 1,
backgroundColor: Colors.grey,
textColor: Colors.white,
fontSize: 16.0
);
Navigator.pop(context);
}
},
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
child: Text("Save",style: TextStyle(color: Colors.white,fontSize: 18,fontWeight: FontWeight.bold),),
),
),
),
Padding(
padding: const EdgeInsets.only(left: 20.0,right: 20.0,top: 8.0,bottom: 8.0),
child: Container(
width: double.infinity,
height: 60,
child: FlatButton(
color: Colors.black,
onPressed: (){
Navigator.pop(context);
},
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
child: Text("Cancel",style: TextStyle(color: Colors.white,fontSize: 18,fontWeight: FontWeight.bold),),
),
),
),
],
),
),
),
);
}
);
}