reloading sections fixed
reloading sections fixed

zjh171/PSTCollectionView,jianwoo/PSTCollectionView,StephaneDelcroix/PSTCollectionView,ba01ei/PSTImprovedCollectionView,Anish-kumar-dev/PSTCollectionView,StephaneDelcroix/PSTCollectionView,CorzFree/PSTCollectionView,niuxinghua/PSTCollectionView,zace-yuan/PSTCollectionView,steipete/PSTCollectionView,Kevin775263419/PSTCollectionView,godLoveLucifer/PSTCollectionView