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[英]Floating Action Button jumps up and down when snackbar animation begins
[英]How to implement floating Snackbar animation in flutter?
我正在尝试在浮动 Snackbar 中实现 animation,它从屏幕底部出现并向上移动,就像 Gmail 应用程序中出现滑动邮件以获取目标的应用程序一样。 有人可以举个例子吗?
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text(
'Product removed from cart',
),
action: SnackBarAction(
label: 'Undo',
onPressed: () {
//
}),
duration: Duration(seconds: 3),
behavior: SnackBarBehavior.floating,
margin: EdgeInsets.only(bottom: 30,left: 10,right: 10),
animation: // **Answer Please**
}
默认的 Flutter Snackbar 没有提供太多的自定义方式。 您可以使用的一个库称为getx 。 它是一个 package,它提供了很多东西,其中包括一个非常灵活的小吃店。 这是我能够提出的向上/向下动画,而不是淡入/淡出。
class SnackbarExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final ColorScheme colorScheme = theme.colorScheme;
final bool isThemeDark = theme.brightness == Brightness.dark;
final Color themeBackgroundColor = isThemeDark
? colorScheme.onSurface
: Color.alphaBlend(colorScheme.onSurface.withOpacity(0.80), colorScheme.surface);
return Center(
child: TextButton(
child: Text(
'Show snackbar',
style: TextStyle(fontSize: 20),
),
onPressed: () {
Get.snackbar(
'',
'',
snackPosition: SnackPosition.BOTTOM,
snackStyle: SnackStyle.FLOATING,
messageText: Text(
'Product removed from cart',
style: TextStyle(
color: Colors.white,
fontSize: 15,
fontWeight: FontWeight.w400,
),
),
titleText: Container(),
margin: const EdgeInsets.only(bottom: kBottomNavigationBarHeight, left: 8, right: 8),
padding: const EdgeInsets.only(bottom: 4, left: 16, right: 16),
borderRadius: 4,
backgroundColor: themeBackgroundColor,
colorText: Theme.of(context).colorScheme.surface,
mainButton: TextButton(
child: Text('Undo'),
onPressed: () {},
),
);
},
),
);
}
}
导入“ fluttertoast
”package 并像这样使用...
Fluttertoast.showToast(
msg:"Toast Message",
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
textColor: Colors.white,
backgroundColor: Colors.black54,
fontSize: 16.0)
我已经尝试了好几天和好几个月了,不幸的是官方文档没有给我们提供使用animation
道具的例子。
但我有一个好消息,我通过使用名为another_flushbar的 package 找到了解决方法
Flushbar(
duration: const Duration(milliseconds: 3000),
message: "Default Snackbar",
margin: const EdgeInsets.symmetric(vertical: 20),
).show(context);
easeIn
和easeOut
的底部 SnackBar Flushbar(
animationDuration: const Duration(seconds: 2),
forwardAnimationCurve: Curves.easeIn,
reverseAnimationCurve: Curves.easeOut,
duration: const Duration(milliseconds: 3000),
flushbarPosition: FlushbarPosition.BOTTOM,
flushbarStyle: FlushbarStyle.FLOATING,
message: "I am Bottom Snackbar",
margin: const EdgeInsets.symmetric(vertical: 20),
).show(context);
easeIn
和easeOut
的顶级 SnackBar Flushbar(
animationDuration: const Duration(seconds: 2),
forwardAnimationCurve: Curves.easeIn,
reverseAnimationCurve: Curves.easeOut,
duration: const Duration(milliseconds: 3000),
flushbarPosition: FlushbarPosition.TOP,
flushbarStyle: FlushbarStyle.FLOATING,
message: "I am Top Snackbar",
margin: const EdgeInsets.symmetric(vertical: 20),
).show(context);
bounceInOut
的 Snackbar Flushbar(
animationDuration: const Duration(seconds: 2),
forwardAnimationCurve: Curves.bounceInOut,
reverseAnimationCurve: Curves.bounceInOut,
duration: const Duration(milliseconds: 3000),
flushbarPosition: FlushbarPosition.BOTTOM,
flushbarStyle: FlushbarStyle.FLOATING,
message: "Snackbar can bounce ",
margin: const EdgeInsets.symmetric(vertical: 20),
).show(context);
github中存在一个针对相同问题的问题。
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