UICollectionView的单选

//点击选定

• (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
  {
  JFCollectionViewCell *cell = (JFCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
  cell.backgroundColor=[UIColor colorWithRed:27/255.0 green:166/255.0 blue:152/255.0 alpha:1];
  cell.topLabel.textColor=[UIColor whiteColor];
  cell.bottomLabel.textColor=[UIColor whiteColor];
  NSLog(@"第%ld区，第%ld个",(long)indexPath.section,(long)indexPath.row);

}
//取消选定
-(void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath{
PackCollectionViewCell *cell = (PackCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
cell.backgroundColor=[UIColor whiteColor];
cell.topLabel.textColor=[UIColor colorWithRed:27/255.0 green:166/255.0 blue:152/255.0 alpha:1];
cell.bottomLabel.textColor=[UIColor blackColor];
NSLog(@"1第%ld区，1第%ld个",(long)indexPath.section,(long)indexPath.row);
}
//设置背景色

• (void)collectionView:(UICollectionView *)collectionView didUnhighlightItemAtIndexPath:(NSIndexPath *)indexPath
  {
  PackCollectionViewCell *cell = (PackCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
  [cell setBackgroundColor:[UIColor whiteColor]];
  }