如何滚动到屏幕的中间

[CoderGFWu]

Platforms

Android, iOS

Description

我看jump的时候设置alignment只能让item的上中下和listview顶部对齐， 怎么设置才能让item滚动到listview的中间呢

My code

No response

Try do it

No response

[LinXunFeng]

observerController.jumpTo(
  index: targetIndex,
  alignment: 0.5,
  offset: (targetOffset) {
    final ctx = observerController.fetchSliverContext();
    final _obj = ObserverUtils.findRenderObject(ctx);
    if (_obj is! RenderSliverMultiBoxAdaptor) return 0;
    final viewport = ObserverUtils.findViewport(_obj);
    if (viewport == null) return 0;
    return (viewport.offset as ScrollPosition).viewportDimension * 0.5;
  },
);

[CoderGFWu]

可以的， 谢谢大佬