In my UICollectionView, I use a simple array of custom objects to produce and display cells. Occasionally that data changes and I'd like to animate the changes all at once. I've chosen to do this by tracking all the changes in a second array, diff'ing the two, and producing a set of move, insert, delete, and update operations inside of a , I use a simple array of
阅读背景：
如何在UICollectionView performBatchUpdates块中订购移动，插入，删除和更新？
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