问题描述
在Flutter提供的大多数示例中,它们正在关闭ListView中的项目。例如,。
In the majority of the Dismissible examples provided by Flutter, they are dismissing items within a ListView. For example, this.
我目前正在做什么:
Widget build(BuildContext context) {
return new Scaffold(
key: _scaffoldKey,
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Center(
child: new ListView(
children: <Widget>[
new Dismissible(
key: personKey,
child: new Text('Dismiss Me'),
onDismissed: (DismissDirection direction) {}
)
],
) // end ListView
) // end Center
); // end return
} // end build()
关闭文本框后,错误:
请确保实现onDismissed处理程序并立即在处理程序触发后立即从应用程序中删除Dismissible小部件。
Make sure to implement the onDismissed handler and to immediately remove the Dismissible widget from the application once that handler has fired.
在Dismissible 在,我看到它检查了的状态_resizeAnimation
,但是我不确定它是否适合 Dismissible
构造函数或 onDismissed
处理程序。
Digging through the Dismissible source at , I see that it checks that status of _resizeAnimation
, but I'm not sure how that fits into the grand scheme of a Dismissible
constructor or onDismissed
handler.
推荐答案
请尝试一下。我提供了UniqueKey作为Dismissible小部件的键,它工作得很好。
Please try this.I provided UniqueKey as key to Dismissible widget, and it worked just fine.
key: UniqueKey(),
这篇关于用Flutter / Dart消除可解雇的对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!