我在打电话performBatchUpdates({self.insertItemsAtIndexPaths(indexPathes)},completion:{_in})在Controller中不可见的CollectionView上!已经有另一个ViewController推到它上面。这会导致以下错误:Invalidupdate:invalidnumberofitemsinsection0.Thenumberofitemscontainedinanexistingsectionaftertheupdate(12)mustbeequaltothenumberofitemscontain