Flutter:带有 CupertinoTabBar 的 CupertinoTabScaffold 在推送屏幕中的 TabBar 底部创建 RenderFlex 溢出问题
Flutter: CupertinoTabScaffold with CupertinoTabBar creating RenderFlex overflow issue at bottom for TabBar in pushed screens
我是一名 iOS 开发人员,所以我知道 TabBarController 在 iOS 中的工作原理。现在我正在研究 Flutter(第一个 APP)。
我有一个应用程序使用 CupertinoApp-CupertinoTabScaffold-CupertinoTabBar 在每个嵌套屏幕中保留 BottomNavigationBar。
我的应用程序的层次结构
- CupertinoTabScaffold
-- CupertinoTabBar
--- Home
---- CupertinoPageScaffold (HomePage)
----- CupertinoPageScaffold (DetailPage pushed from home)
--- OtherTabs
从主页推送到详情页,使用以下代码:
Navigator.push(
context,
Platform.isIOS
? CupertinoPageRoute(
builder: (context) => DetailPage(),
)
: MaterialPageRoute(
builder: (context) => DetailPage(),
));
现在在详细信息屏幕上,我需要 Column
和 GridView
进行一些查看。
所以当 GridView
有更多项目时,它给出错误:
A RenderFlex overflowed by 56 pixels on the bottom.
这是 TabBar
的 space。
那么如何在 Flutter 中管理这种类型的页面,在嵌套屏幕中有 TabBar 和可滚动的 Widgets?
我关注了this link。
详情页面代码:
class DetailPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
heroTag: 'detail 1',
backgroundColor: Colors.white,
transitionBetweenRoutes: false,
middle: Text('Tab 1 detail',),
),
child: Container(
child: Column(
children: <Widget>[
SizedBox(
height: 100.0,
child: Center(
child: Text('Some Menus'),
),
),
Container(
child: GridView.builder(
itemCount: 30,
scrollDirection: Axis.vertical,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCountAndFixedHeight(
crossAxisCount: 2,
crossAxisSpacing: 4,
mainAxisSpacing: 4,
height: 160.0
),
itemBuilder: (context, index) {
return Container(
child: Padding(
padding: EdgeInsets.all(6.0),
child: Container(
decoration: BoxDecoration(
color: Color(0xFF3C9CD9),
borderRadius: BorderRadius.all(Radius.circular(30.0)),
boxShadow: <BoxShadow>[
BoxShadow(
color: Colors.black54,
blurRadius: 2.0,
offset: Offset(4, 3))
]),
child: Padding(
padding: EdgeInsets.all(30.0),
child: Center(
child: Text('$index'),
),
)),
),
);
}
),
)
],
),
),
);
}
}
输出:
用 Expanded
小部件包裹网格
class DetailPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
heroTag: 'detail 1',
backgroundColor: Colors.white,
transitionBetweenRoutes: false,
middle: Text('Tab 1 detail',),
),
child: Container(
child: Column(
children: <Widget>[
SizedBox(
height: 100.0,
child: Center(
child: Text('Some Menus'),
),
),
Expanded(
child: Container(
child: GridView.builder(
itemCount: 30,
scrollDirection: Axis.vertical,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCountAndFixedHeight(
crossAxisCount: 2,
crossAxisSpacing: 4,
mainAxisSpacing: 4,
height: 160.0
),
itemBuilder: (context, index) {
return Container(
child: Padding(
padding: EdgeInsets.all(6.0),
child: Container(
decoration: BoxDecoration(
color: Color(0xFF3C9CD9),
borderRadius: BorderRadius.all(Radius.circular(30.0)),
boxShadow: <BoxShadow>[
BoxShadow(
color: Colors.black54,
blurRadius: 2.0,
offset: Offset(4, 3))
]),
child: Padding(
padding: EdgeInsets.all(30.0),
child: Center(
child: Text('$index'),
),
)),
),
);
}
),
),
)
],
),
),
);
}
}
我是一名 iOS 开发人员,所以我知道 TabBarController 在 iOS 中的工作原理。现在我正在研究 Flutter(第一个 APP)。
我有一个应用程序使用 CupertinoApp-CupertinoTabScaffold-CupertinoTabBar 在每个嵌套屏幕中保留 BottomNavigationBar。
我的应用程序的层次结构
- CupertinoTabScaffold
-- CupertinoTabBar
--- Home
---- CupertinoPageScaffold (HomePage)
----- CupertinoPageScaffold (DetailPage pushed from home)
--- OtherTabs
从主页推送到详情页,使用以下代码:
Navigator.push(
context,
Platform.isIOS
? CupertinoPageRoute(
builder: (context) => DetailPage(),
)
: MaterialPageRoute(
builder: (context) => DetailPage(),
));
现在在详细信息屏幕上,我需要 Column
和 GridView
进行一些查看。
所以当 GridView
有更多项目时,它给出错误:
A RenderFlex overflowed by 56 pixels on the bottom.
这是 TabBar
的 space。
那么如何在 Flutter 中管理这种类型的页面,在嵌套屏幕中有 TabBar 和可滚动的 Widgets?
我关注了this link。
详情页面代码:
class DetailPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
heroTag: 'detail 1',
backgroundColor: Colors.white,
transitionBetweenRoutes: false,
middle: Text('Tab 1 detail',),
),
child: Container(
child: Column(
children: <Widget>[
SizedBox(
height: 100.0,
child: Center(
child: Text('Some Menus'),
),
),
Container(
child: GridView.builder(
itemCount: 30,
scrollDirection: Axis.vertical,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCountAndFixedHeight(
crossAxisCount: 2,
crossAxisSpacing: 4,
mainAxisSpacing: 4,
height: 160.0
),
itemBuilder: (context, index) {
return Container(
child: Padding(
padding: EdgeInsets.all(6.0),
child: Container(
decoration: BoxDecoration(
color: Color(0xFF3C9CD9),
borderRadius: BorderRadius.all(Radius.circular(30.0)),
boxShadow: <BoxShadow>[
BoxShadow(
color: Colors.black54,
blurRadius: 2.0,
offset: Offset(4, 3))
]),
child: Padding(
padding: EdgeInsets.all(30.0),
child: Center(
child: Text('$index'),
),
)),
),
);
}
),
)
],
),
),
);
}
}
输出:
用 Expanded
小部件包裹网格
class DetailPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
heroTag: 'detail 1',
backgroundColor: Colors.white,
transitionBetweenRoutes: false,
middle: Text('Tab 1 detail',),
),
child: Container(
child: Column(
children: <Widget>[
SizedBox(
height: 100.0,
child: Center(
child: Text('Some Menus'),
),
),
Expanded(
child: Container(
child: GridView.builder(
itemCount: 30,
scrollDirection: Axis.vertical,
shrinkWrap: true,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCountAndFixedHeight(
crossAxisCount: 2,
crossAxisSpacing: 4,
mainAxisSpacing: 4,
height: 160.0
),
itemBuilder: (context, index) {
return Container(
child: Padding(
padding: EdgeInsets.all(6.0),
child: Container(
decoration: BoxDecoration(
color: Color(0xFF3C9CD9),
borderRadius: BorderRadius.all(Radius.circular(30.0)),
boxShadow: <BoxShadow>[
BoxShadow(
color: Colors.black54,
blurRadius: 2.0,
offset: Offset(4, 3))
]),
child: Padding(
padding: EdgeInsets.all(30.0),
child: Center(
child: Text('$index'),
),
)),
),
);
}
),
),
)
],
),
),
);
}
}