在下面的情况下使appbar透明
在下面的情况下使appbar透明
提问于 2019-12-13 12:25:20
伙计们！我正在尝试让这个AppBar变得透明。因为它的背后会有一个背景，但到目前为止我还没有成功。谢谢大家，谢谢你们！
class _HomePageState extends State<HomePage> {
int index = 0;
Widget build(BuildContext context) {
return Scaffold(
body: show(index),
appBar: AppBar(
backgroundColor: Colors.transparent,
actions: <Widget>[
IconButton(
icon: Icon(Icons.settings),
onPressed: (){},
)
],
),
bottomNavigationBar: Theme(
data: Theme.of(context).copyWith(
canvasColor: Colors.grey[900],
),
child: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
currentIndex: index,
showUnselectedLabels: true,
unselectedItemColor: Colors.white54,
selectedItemColor: Colors.white,
onTap: ((int x) {
setState(() {
index = x;
});
}),
items: [
new BottomNavigationBarItem(
icon: Icon(Icons.home), title: Text("Home")),
new BottomNavigationBarItem(
icon: Icon(Icons.search), title: Text("Search")),
new BottomNavigationBarItem(
icon: Icon(Icons.library_music), title: Text("Library")),
],
),
),
);
}
}
回答 3
Stack Overflow用户
发布于 2019-12-13 14:19:38
应用程序栏默认有阴影，如果你想要透明的应用程序栏，你还需要在AppBar中添加elevation: 0来去除阴影。
Stack Overflow用户
发布于 2019-12-13 12:28:41
从以下代码获取提示(源https://mrflutter.com/fullscreen-page-with-transparent-appbar-in-flutter/)
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage(
'https://images.unsplash.com/photo-1517030330234-94c4fb948ebc?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1275&q=80'),
fit: BoxFit.cover,
),
),
child: Center(
child: Text(
'mrflutter.com',
style: TextStyle(
color: Colors.white,
fontSize: 30,
),
),
),
),
Positioned(
child: AppBar(
title: Text("Transparent AppBar"),
backgroundColor: Colors.transparent,
elevation: 0,
actions: <Widget>[
IconButton(
icon: Icon(Icons.share),
onPressed: () {},
tooltip: 'Share',
),
],
),
)
],
),
);
}Stack Overflow用户
发布于 2019-12-13 12:43:58
尝试将AppBar和Body part包装在堆栈中，并使AppBar透明，以便获得所需的输出
class _HomePageState extends State<HomePage> {
int index = 0;
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
show(index),
Wrap(
children: <Widget>[
AppBar(
backgroundColor: Colors.transparent,
actions: <Widget>[
IconButton(
icon: Icon(Icons.settings),
onPressed: () {},
)
],
),
],
),
],
),
bottomNavigationBar: Theme(
data: Theme.of(context).copyWith(
canvasColor: Colors.grey[900],
),
child: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
currentIndex: index,
showUnselectedLabels: true,
unselectedItemColor: Colors.white54,
selectedItemColor: Colors.white,
onTap: ((int x) {
setState(() {
index = x;
});
}),
items: [
new BottomNavigationBarItem(
icon: Icon(Icons.home), title: Text("Home")),
new BottomNavigationBarItem(
icon: Icon(Icons.search), title: Text("Search")),
new BottomNavigationBarItem(
icon: Icon(Icons.library_music), title: Text("Library")),
],
),
),
);
}
} 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/59316120
复制相关文章
相似问题
腾讯云开发者
