flutter - 如何在 flutter 中发出可关闭的警报？

Question

我可以显示警报，但无法关闭它。但为什么？
编码:

showGeneralDialog(
        barrierColor: Colors.red,
        context: context,
        barrierDismissible: true,
        barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
        transitionDuration: const Duration(milliseconds: 300),
        pageBuilder: (BuildContext buildContext, Animation animation,
            Animation secondaryAnimation) {
          if (shouldDismiss) {
            Future.delayed(const Duration(seconds: 3), () {
              Navigator.of(context, rootNavigator: true).pop(true);
            });
          }
          return SomeWidget();

Answer 1

替换这个

 Navigator.of(context, rootNavigator: true).pop(true);

这样

 Navigator.of(buildContext, rootNavigator: true).pop(true);