I use the showCustomAlert method to use the alert of confirmation.
In v0.6.1, showCustomAlert cannot apply the IosAlertOptions config. So I wrote the code below, and then showCustomAlert would show a strange alert, such as the image.

FlutterPlatformAlert.showCustomAlert(
  windowTitle: '削除',
  text: '削除します。よろしいですか？',
  positiveButtonTitle: '削除',
  negativeButtonTitle: 'キャンセル',
  options: PlatformAlertOptions(
    ios: IosAlertOptions(
      positiveButtonStyle: IosButtonStyle.destructive,
      negativeButtonStyle: IosButtonStyle.cancel,
    ),
  ),
).then((result) {
  if (result == CustomButton.positiveButton) {
    Logger().d('削除しました');
  }
});

So please fix it.

I tried to find the reason for this, so I saw it.
Comparing FlutterPlatformAlertPlugin.swift in v0.6.1 and SwiftFlutterPlatformAlertPlugin.swift in v0.5.3, I found that v0.5.3 uses styles by args["...ButtonStyle"], but v0.6.1 uses styles by args["...ButtonTitle"], so if users set a word that does not mean abort or cancel, then users fail to set style properly.