[英]Flutter dismiss item in Animated List not working correctly
我在 Flutter 应用程序中使用AnimatedList
。 它正在工作,但dismiss
-behavior 并不顺利,因为在转换时被解雇的项目会更改为上面的项目。
这是一个屏幕视频,以便更好地理解。 专注于文本,它总是在过渡中更改为第一项的文本(“Hallo Dasist 1”)。
我遵循了本教程,您还可以在 CodePad 上对其进行测试,您可以在其中看到完全相同的行为。 这不是所需的动画...有谁知道我该如何解决这个问题?
以下是我关闭这些项目的方式:
_removeMemoryAtIndex(int index, Month currentMonth) {
listKey.currentState!.removeItem(
index,
(_, animation) => slideIt(
context,
currentMonth,
0,
CurvedAnimation(
parent: animation,
curve: Curves.easeIn,
reverseCurve: Curves.easeOut),
),
duration: Duration(
milliseconds: 500,
),
);
Provider.of<MemoryImageProvider>(context, listen: false)
.removeMemoryAt(index: index);
}
和我的slideIt
- 动画功能:
Widget slideIt(
BuildContext context,
Month currentMonth,
int index,
animation,
) {
Memory memory = currentMonth.memories[index];
return SlideTransition(
position: Tween<Offset>(
begin: const Offset(-1, 0),
end: Offset(0, 0),
).animate(
CurvedAnimation(
parent: animation,
curve: Curves.easeIn,
reverseCurve: Curves.easeOut,
),
),
child: Column(
children: [
MemoryTile(
memory: memory,
monthName: currentMonth.name,
onTapped: () {
_removeMemoryAtIndex(index, currentMonth);
print('tap on ${memory.description}');
},
),
SizedBox(
height: scaleWidth(20),
),
],
),
);
}
如果您需要更多信息,请告诉我们! 任何帮助表示赞赏。 我希望这可以以某种方式修复......
我们可以为此创建一个临时模型数据,这就是它的工作方式。
import 'package:flutter/material.dart';
class MemoryTile {
int index;
String name;
MemoryTile({
required this.index,
required this.name,
});
}
final items = List.generate(
10,
(index) => MemoryTile(
index: index,
name: "name $index",
),
);
class AnimLtest extends StatefulWidget {
AnimLtest({Key? key}) : super(key: key);
@override
_AnimLtestState createState() => _AnimLtestState();
}
class _AnimLtestState extends State<AnimLtest> {
final GlobalKey<AnimatedListState> listKey = GlobalKey<AnimatedListState>();
// Remove the selected item from the list model.
_removeMemoryAtIndex(int index, MemoryTile currentMonth) {
var tempMOnth = currentMonth;
listKey.currentState!.removeItem(
index,
(_, animation) => slideIt(
context,
tempMOnth,
CurvedAnimation(
parent: animation,
curve: Curves.easeIn,
reverseCurve: Curves.easeOut),
),
duration: Duration(
milliseconds: 500,
),
);
items.removeAt(index);
// setState(() {});
}
@override
Widget build(BuildContext context) {
return AnimatedList(
key: listKey,
initialItemCount: items.length,
itemBuilder: (context, index, animation) => Container(
child: InkWell(
onTap: () {
_removeMemoryAtIndex(index, items[index]);
},
child: slideIt(
context,
items[index],
animation,
),
),
),
);
}
Widget slideIt(
BuildContext context,
MemoryTile memory,
animation,
) {
return SlideTransition(
position: Tween<Offset>(
begin: const Offset(-1, 0),
end: Offset(0, 0),
).animate(
CurvedAnimation(
parent: animation,
curve: Curves.easeIn,
reverseCurve: Curves.easeOut,
),
),
child: Row(
children: [
CircleAvatar(
child: Text(memory.index.toString()),
),
Text("Name+> ${memory.name}")
],
),
);
}
}
愚蠢的错误...如果您查看_removeMemoryAtIndex
方法,我总是将0
作为索引传递...
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