Flutter ListView，SliverList等内部的当前滚动偏移量 [英] Current scroll offset inside a Flutter ListView, SliverList,etc

问题描述

如何获取Flutter ListView，SliverList 等内部的当前滚动偏移量？

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

推荐答案

• 如果您在滚动视图中，请使用 Scrollable.of（context）.position.pixels 。


• 如果您在外面，您可能想将 ScrollController 作为滚动视图的控制器参数，那么您可以阅读 controller.offset 。


• 或者，将滚动通知与 NotificationListener 一起使用。
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• 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上询问的，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

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