flutter - SetState 不更新参数 Flutter 的值 ?? 我想在网格之间切换，但 setstate 只显示网格视图。?? 我如何更新状态
问题描述
当我点击 IconButton photo_size_select 它没有更新文本表单 _setPostToggle(String toggletype) 当我点击两个图标按钮时它只显示网格视图文本？为什么设置状态不起作用？I/flutter (27517): gridView I/flutter (27517): gridView SetState 不更新参数 Flutter 的值 ?? 我想在网格之间切换，但 setstate 只显示网格视图。?? 我如何更新状态
class Profile extends StatefulWidget {
final String? profileId;
Profile({required this.profileId});
@override
_ProfileState createState() => _ProfileState();
}
class _ProfileState extends State<Profile> {
final String? currentUserId = currentUser?.id;
String postViewStyle = 'gridView';
bool isLoading = false;
int postCount = 0;
List<Post> posts = [];
@override
void initState() {
super.initState();
getProfilePosts();
}
getProfilePosts() async {
setState(() {
isLoading = true;
});
QuerySnapshot snapshot = await postRef
.doc(widget.profileId)
.collection('userPosts')
.orderBy('timestamp', descending: true)
.get();
setState(() {
isLoading = false;
postCount = snapshot.docs.length;
posts = snapshot.docs
.map((doc) => Post.fromDocument(doc))
.toList(growable: true);
});
print(posts.toList().toString());
}
editProfile() {
Navigator.push(
this.context,
MaterialPageRoute(
builder: (context) => EditProfilePageWidget(
currentUserId: currentUserId,
)),
);
}
//build button on users condtion
buildButton({required String text, required Function function}) {
return Padding(
padding: EdgeInsets.fromLTRB(15, 20, 15, 0),
child: TextButton(
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0),
side: BorderSide(
color: Colors.grey.shade900,
width: 1,
)),
)),
onPressed: () async {
await function();
},
child: Text(
text,
textAlign: TextAlign.center,
style: TextStyle(
fontFamily: 'Lato',
fontSize: 18,
),
),
),
);
}
// Button for Profile header
buildProfileButton() {
// View our own profile and follow button
bool isProfileOwner = currentUserId == widget.profileId;
if (isProfileOwner) {
return buildButton(text: "Edit Profile", function: editProfile);
}
}
buildProfilePost() {
if (isLoading) {
return CircularProgressIndicator();
} else if (postViewStyle == 'gridView') {
List<GridTile> gridTiles = [];
posts.forEach((element) {
gridTiles.add(
GridTile(
child: PostGrid(post: element),
),
);
});
return GridView.count(
padding: EdgeInsets.zero,
crossAxisCount: 3,
childAspectRatio: 1,
crossAxisSpacing: 2.5,
mainAxisSpacing: 2.5,
shrinkWrap: true,
primary: false,
// physics: NeverScrollableScrollPhysics(),
scrollDirection: Axis.vertical,
children: gridTiles,
);
} else if (postViewStyle == "listView") {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: posts,
);
}
}
_setPostToggle(String toggleType) {
setState(() {
toggleType = this.postViewStyle;
});
}
buildToogleView() {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
IconButton(
onPressed: () {
_setPostToggle("gridView");
print(postViewStyle);
},
icon: Icon(
Icons.grid_view_rounded,
size: 25,
),
color: Colors.deepPurple.shade500,
),
IconButton(
onPressed: () {
_setPostToggle("listView");
print(postViewStyle);
},
icon: Icon(
Icons.photo_size_select_actual_outlined,
size: 25,
),
color: Colors.deepPurple.shade500,
)
],
);
}
解决方案
override
Widget build(BuildContext context) {
return FutureBuilder(
future: usersRef.doc(widget.profileId).get(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return circularProgressBar();
}
Users user = Users.fromDocument(snapshot.data);
return Scaffold(
appBar: header(context, titleText: "Knot me"),
body: SafeArea(
child: Column(
mainAxisSize: MainAxisSize.max,
children: [
Padding(
padding: EdgeInsets.fromLTRB(0, 0, 0, 10),
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Row(
mainAxisSize: MainAxisSize.max,
children: [
Padding(
padding: EdgeInsets.fromLTRB(8, 8, 0, 0),
child: Icon(
Icons.alternate_email_rounded,
color: Colors.grey.shade600,
size: 17,
),
),
Padding(
padding: EdgeInsets.fromLTRB(1, 8, 0, 0),
child: Text(
user.username,
style: GoogleFonts.aBeeZee(
fontSize: 19.0,
fontWeight: FontWeight.bold,
color: Colors.grey.shade800),
),
),
],
),
],
),
),
Expanded(
child: ListView(
padding: EdgeInsets.zero,
shrinkWrap: true,
scrollDirection: Axis.vertical,
children: <Widget>[
Padding(
padding: EdgeInsets.fromLTRB(0, 10, 0, 0),
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Padding(
padding: EdgeInsets.fromLTRB(12, 0, 0, 1),
child: Container(
width: 100,
height: 100,
child: Stack(
children: [
Align(
alignment: Alignment(-0.4, -0.02),
child: Padding(
padding:
EdgeInsets.fromLTRB(1, 0, 0, 0),
child: Container(
width: 100,
height: 96,
clipBehavior: Clip.antiAlias,
decoration: BoxDecoration(
shape: BoxShape.circle,
),
child: Image(
image: CachedNetworkImageProvider(
user.photoUrl),
),
),
),
),
Align(
alignment: Alignment(1, 1),
child: Container(
width: 27,
height: 27,
decoration: BoxDecoration(
color: Color(0xFF1062AE),
shape: BoxShape.circle,
),
child: Icon(
CupertinoIcons.add_circled,
color: Colors.white,
size: 24,
),
),
)
],
),
),
),
Padding(
padding: EdgeInsets.fromLTRB(0, 0, 15, 0),
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment:
MainAxisAlignment.spaceEvenly,
children: [
Column(
mainAxisSize: MainAxisSize.max,
children: [
Text(
"$postCount".toString(),
style: TextStyle(
fontFamily: 'Lato',
fontSize: 18,
color: Colors.black,
fontWeight: FontWeight.bold,
),
),
Padding(
padding:
EdgeInsets.fromLTRB(0, 3, 0, 0),
child: Text(
'Posts',
style: TextStyle(
fontFamily: 'Lato',
fontSize: 17,
),
),
)
],
),
Padding(
padding: EdgeInsets.fromLTRB(20, 0, 20, 0),
child: Column(
mainAxisSize: MainAxisSize.max,
children: [
Text(
'179',
style: TextStyle(
fontFamily: 'Lato',
fontSize: 17,
),
),
Padding(
padding:
EdgeInsets.fromLTRB(0, 3, 0, 0),
child: Text(
'Followers',
style: TextStyle(
fontFamily: 'Lato',
fontSize: 17,
// color: Colors.white,
),
),
)
],
),
),
Column(
mainAxisSize: MainAxisSize.max,
children: [
Text(
'144',
style: TextStyle(
fontFamily: 'Lato',
fontSize: 17,
),
),
Padding(
padding:
EdgeInsets.fromLTRB(0, 3, 0, 0),
child: Text(
'Followers',
style: TextStyle(
fontFamily: 'Lato',
fontSize: 17,
),
),
)
],
)
],
),
)
],
),
),
Padding(
padding: EdgeInsets.fromLTRB(0, 16, 0, 0),
child: Row(
mainAxisSize: MainAxisSize.max,
children: [
Container(
width: MediaQuery.of(context).size.width * 0.55,
decoration: BoxDecoration(
color: Colors.transparent,
),
child: Align(
alignment: Alignment(-1, 0),
child: Padding(
padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
child: Column(
mainAxisSize: MainAxisSize.max,
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(
user.displayName,
textAlign: TextAlign.start,
style: TextStyle(
fontFamily: 'Lato',
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
Padding(
padding:
EdgeInsets.fromLTRB(0, 3, 0, 0),
child: Text(
user.bio,
style: TextStyle(
fontFamily: 'Lato',
fontSize: 15,
),
),
)
],
),
),
),
)
],
),
),
buildProfileButton(),
Divider(
height: 0.0,
),
buildToogleView(),
Divider(
height: 0.0,
),
buildProfilePost(),
],
),
)
],
),
),
);
},
);
}
}
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