The use of DeleteItems method in CollectionView

Recently in the function of a bulk deletion of photos, called DeleteItems this method, but after using this method, the program crashes, error: You need to also delete associated data from the data source as well This is because when using this method, in order to delete the data source data, I in the project to use the bubbling indexpath to a small to large sort, re-traverse, save it into the array, so that the photo can be selected delete function, in addition to note that this method and reloaddata can not coexist , as long as the call DeleteItems will automatically complete the deletion of the animation effect, the specific animation effect can be referred to the iphone album deletion function,

The use of DeleteItems method in CollectionView