dart - Modal 的 onClose 相当于 Dart/Flutter 的 Dialog 是什么？

Question

我正在尝试在对话框关闭时刷新我的状态，无论是通过提交还是在用户按下对话框外退出时。我将如何捕获它？相当于 JS/React 的 Modal onClose。

  showDialog(
  context: this.context,
  builder: (BuildContext context) {
    return AlertDialog(
      title: Text('Add a custom word'),
      content: _renderForm(),
      actions: <Widget>[
        FlatButton(
          child: Text('ADD'),
          onPressed: () => (_textController.text.isNotEmpty) ? _addNewPair() : null,
        ),
      ],
    );
  }

Answer 1

您可以在 showDialog 之前添加 await 关键字:

    yourMethod () async {

    await showDialog(
      context: this.context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text('Add a custom word'),
          content: _renderForm(),
          actions: <Widget>[
            FlatButton(
              child: Text('ADD'),
              onPressed: () => (_textController.text.isNotEmpty) ? _addNewPair() : null,
            ),
          ],
        );
      }

      //here you can continue because your dialog was closed
      print("after my dialog was closed");

      }

如果你想关闭你的对话框，只需使用这个:

    Navigator.of(context).pop();