如何实例化一个collectionview 的cell？

Question

letcell=collectionView.dequeueReusableCellWithReuseIdentifier("BigRoomVideoCell",forIndexPath:indexPath)asVideoViewCell上面是重用cell的写法，但是如何每次都实例化一个collectionview的cell？我尝试过letcell=VideoViewCell()直接报***Terminatingappduetouncaughtexception'NSInternalInconsistencyException',reason:'thecellreturnedfrom-collectionView:cellForItemAtIndexPath:doesnothaveareuseIdentifier-cellsmustberetrievedbycalling-dequeueReusableCellWithReuseIdentifier:forIndexPath:google了也没找到合适的答案

Answer 1

也试过letcell=collectionView.cellForItemAtIndexPath(indexPath)asVideoViewCell办法，直接报fatalerror:unexpectedlyfoundnilwhileunwrappinganOptionalvalue
                            

Answer 2

是否没有注册
[_collectionViewregisterClass:[BigRoomVideoCellclass]
forCellWithReuseIdentifier:CELL_IDENTIFIER];