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

问题描述

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

I am reading this doc page: https://docs.flutter.io/flutter/painting/TextSpan/recognizer.html.

此页面中包含的示例是一个StatefulWidget，文档说拥有GestureRecognizer对象的代码必须调用GestureRecognizer.dispose，当不再使用TextSpan对象时..

The example included in this page is a StatefulWidget and the doc says The code that owns the GestureRecognizer object must call GestureRecognizer.dispose when the TextSpan object is no longer used..

我想知道是否可以在StatelessWidget中使用 TextSpan 的 recognizer ?

I am wondering if I can use the recognizer of TextSpan in a StatelessWidget??

如果是，我是否需要在某个地方打电话给 dispose ?我不知道该在哪里打电话.

If so, do I need to call dispose somewhere? I have no idea where to call it.

非常感谢.

推荐答案

您不能在 StatelessWidget 中执行此操作.您将不得不将其转换为 StatefulWidget ，并覆盖 State 的 dispose 方法:

You cannot do that in a StatelessWidget. You will have to convert it into a StatefulWidget and override the dispose method of 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();
  }
}

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