Flutter：我需要在StatelessWidget（TextSpan/recognizer）中调用GestureRecognizer.dispose吗？

我正在阅读此文档页面：https://docs.flutter.io/flutter/painting/TextSpan/recognizer.html https://docs.flutter.io/flutter/painting/TextSpan/recognizer.html.

此页面中包含的示例是 StatefulWidget，文档说The code that owns the GestureRecognizer object must call GestureRecognizer.dispose when the TextSpan object is no longer used..

我想知道我是否可以使用recognizer of TextSpan在无状态小部件中？

如果是这样，我需要打电话吗dispose某处？我不知道在哪里调用它。

你不能在StatelessWidget。您必须将其转换为StatefulWidget并覆盖dispose的方法State:

class Foo extends StatefulWidget {
  @override
  _FooState createState() => _FooState();
}

class _FooState extends State<Foo> {
  GestureRecognizer gestureRecognizer;

  @override
  void dispose() {
    gestureRecognizer?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Container();
  }
}