在我的flutter应用程序中,我有一个底部的页面,该页面的初始高度显示为100。我想在用户与其互动时(例如,可以是500或全屏显示)增加其高度(例如手势检测或单击工作表上的按钮)
是否可以在装入纸张后更改其高度。
我的底页就像
Widget _bottomSheetContainer(BuildContext context) {
return Container(
height: 100,
decoration: BoxDecoration(
border:
Border(top: BorderSide(color: Theme.of(context).dividerColor))),
child: Row(children: [
Expanded(
child: Padding(
padding: EdgeInsets.all(10.0),
child: Text('Some text here!'),
)
),
Expanded(
child: IconButton(
icon: Icon(Icons.arrow_upward),
// color: themeData.primaryColor,
onPressed: () => _onPressed(context)
),
),
]));
}
_onPressed(BuildContext context) {
BottomSheet w = context.widget;
// Can we change the container height (from 100 to 500) that's part of the bottom sheet from here?
}
答案 0 :(得分:2)
您需要确保小部件为stateful widget,然后可以使用setState(() => ...)
更新其实例参数,然后flutter将更新渲染的结果。
class _WidgetState extends State<Widget> {
double height = 200.0; // starting height value
Widget build() {
<...>
Container(
height: height,
<...>
}
_onPressed(BuildContext context) {
BottomSheet w = context.widget;
// Can we change the container height (from 100 to 500) that's part of the bottom sheet from here?
setState({
height = 300.0; // new height value
})
}
}