iOS App Development

The childrenDelegate property on GridView corresponds to the SliverGrid.delegate property, and the gridDelegate property on the GridView corresponds to the SliverGrid.gridDelegate property. The GridView, GridView.count, and GridView.extent constructors' children arguments correspond to the childrenDelegate being a SliverChildListDelegate with that same argument. The GridView.builder constructor's itemBuilder and childCount arguments correspond to the childrenDelegate being a SliverChildBuilderDelegate with the matching arguments. The GridView.count and GridView.extent constructors create custom grid delegates, and have equivalently named constructors on SliverGrid to ease the transition: SliverGrid.count and SliverGrid.extent respectively. https://www.youtube.com/watch?v=Q8r6ak79qYs