找了许多方法跟教程,都无法合适的获取一个稳定持续变化的值,要么归零要么变空,要么在item插入、移动、删除的时候高度无法正确更正
试了下合适的方法可以获取到一个稳定持续变化的值:
```object-c
public int getScrollYDistance() {
LinearLayoutManager layoutManager = (LinearLayoutManager) mRvHomeView.getLayoutManager();
assert layoutManager != null;
int position = layoutManager.findFirstVisibleItemPosition();
View firstVisibleChildView = layoutManager.findViewByPosition(position);
assert firstVisibleChildView != null;
int itemHe