Flutter：在按下按键时跳出“Focus”Widget

Question

我想用箭头键遍历 Focus-Group，以便选择下一个/上一个 focusNode。在 tab/shift+tab 上，我希望焦点跳出那个焦点组，到我的焦点组之外的下一个/上一个焦点节点：

Focus(
  onKey: (focusNode, event) {
     if (event.runtimeType == RawKeyDownEvent) {
      if (event.logicalKey == LogicalKeyboardKey.arrowDown) {
          focusNode.nextFocus();
          return KeyEventResult.handled;

      } else if (event.logicalKey == LogicalKeyboardKey.arrowUp) {
          focusNode.previousFocus();
          return KeyEventResult.handled;

      } else if (event.logicalKey == LogicalKeyboardKey.tab) {
          if(RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.shiftLeft))){ 

            // TODO: JUMP FOCUS OUT OF THIS FOCUS WIDGET 
            // TO THE FOCUS NODE ABOVE/BEFORE THIS FOCUS WIDGET

          } else {

            // TODO: JUMP FOCUS OUT OF THIS FOCUS WIDGET 
            // TO THE FOCUS NODE BELOW/AFTER THIS FOCUS WIDGET

          }
          return KeyEventResult.handled;
      }
     }
     return KeyEventResult.ignored;
  },
  child: ...

Answer 1

Try  FocusManager.of(context).unfocus;