如何在Flutter中刷新AlertDialog? [英] How to refresh an AlertDialog in Flutter?
本文介绍了如何在Flutter中刷新AlertDialog?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
当前,我有一个AlertDialog
和一个IconButton
.用户可以单击IconButton,每次单击都有两种颜色.问题是我需要关闭AlertDialog并重新打开以查看颜色图标的状态更改.我想在用户单击时立即更改IconButton的颜色.
Currently, I have an AlertDialog
with an IconButton
. The user can click on the IconButton, I have two colors for each click. The problem is that I need to close the AlertDialog and reopen to see the state change of the color icon. I want to change the IconButton color immediately when the user clicks it.
这是代码:
bool pressphone = false;
//....
new IconButton(
icon: new Icon(Icons.phone),
color: pressphone ? Colors.grey : Colors.green,
onPressed: () => setState(() => pressphone = !pressphone),
),
推荐答案
使用StatefulBuilder在Dialog内部使用setState并仅在其内部更新窗口小部件.
Use StatefulBuilder to use setState inside Dialog and update Widgets only inside of it.
showDialog(
context: context,
builder: (context) {
String contentText = "Content of Dialog";
return StatefulBuilder(
builder: (context, setState) {
return AlertDialog(
title: Text("Title of Dialog"),
content: Text(contentText),
actions: <Widget>[
FlatButton(
onPressed: () => Navigator.pop(context),
child: Text("Cancel"),
),
FlatButton(
onPressed: () {
setState(() {
contentText = "Changed Content of Dialog";
});
},
child: Text("Change"),
),
],
);
},
);
},
);
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