findChildIndexBuilder method
Indicates how would the grid found a reusable RenderObject through id
.
为 Grid 布局指示如何找到可复用的 RenderObject。
Implementation
@override
int findChildIndexBuilder(String id, List<AssetEntity> currentAssets) {
int index = currentAssets.indexWhere((AssetEntity e) => e.id == id);
if (specialItemPosition == SpecialItemPosition.prepend) {
index += 1;
}
return index;
}