Flutter ListView、SliverList 等中的当前滚动偏移量 [英] Current scroll offset inside a Flutter ListView, SliverList,etc

问题描述

如何获取 Flutter ListView、GridView、SliverList` 等中的当前滚动偏移量?

How do I get the current scroll offset inside a Flutter ListView, GridView, SliverList`, etc?

推荐答案

• 如果您在滚动视图中，请使用 Scrollable.of(context).position.pixels.
• 如果你在外面，你可能想把 ScrollController 作为滚动视图的控制器参数，然后你可以阅读 controller.offset.李>
• 或者，使用带有 NotificationListener 的滚动通知.
• If you're inside the scroll view use Scrollable.of(context).position.pixels.
• If you're outside, you probably want to hand a ScrollController in as the controller argument of the scroll view, then you can read controller.offset.
• Alternatively, use scroll notifications with NotificationListener.

这是在 Flutter Gitter 上提出的，并回答:https://gitter.im/flutter/flutter?at=591243f18a05641b1167be0e

This was asked on Flutter Gitter, and answered: https://gitter.im/flutter/flutter?at=591243f18a05641b1167be0e

这篇关于Flutter ListView、SliverList 等中的当前滚动偏移量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！