flutter 输入框点击空白区域失焦（基于全屏）

在页面根使用 child 页面内容

class KeyboardDismissOnTap extends StatelessWidget {
  final Widget child;

  const KeyboardDismissOnTap({super.key, required this.child});

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      behavior: HitTestBehavior.translucent,
      onTap: () => FocusScope.of(context).unfocus(),
      child: child,
    );
  }
}