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ios - 如何在没有 Storyboard的情况下以编程方式将单元格添加到 UICollectionView

我尝试了以下代码:-(UICollectionViewCell*)collectionView:(UICollectionView*)collectionViewcellForItemAtIndexPath:(NSIndexPath*)indexPath{Pictograma*pictograma;pictograma=[pictogramasobjectAtIndex:indexPath.row];AddPictogramaCell*newCell=[[AddPictogramaCellalloc]initWithFrame:CGRectMake(0,0,200,200)pictog