macos - Flutter RawKeyboardListener triggering system sounds on MacOS

Question

I have a MacOS desktop application built with flutter. In it I have a RawKeyboardListener widget. it is functioning as expected. It is capturing keyboard input which I could process as normal.

However whenever I press a key the OS level key input rejection sound plays. That sound that comes up when you press a key in a place where the key specifically won't work.

I haven't encountered this otherwise when using the listener so I'm not even sure where to begin.

标签： macosflutterdartflutter-desktop

Answer 1

如果您想避免按键发出哔哔声，您应该使用FocusNode's onKey, 来实际处理事件（即返回 true），而不仅仅是监听事件的存在（如 in RawKeyboardListener）

FocusNode.onKey使用小部件完成时，使用 最容易处理密钥Focus：

Widget build(BuildContext context) {
  return Focus(
    onKey: (FocusNode node, RawKeyEvent event) => true,
    child: ...
  );
}

这将为您管理焦点节点（根据需要插入和删除它）。