I found this
- (void)collectionView:(JNWCollectionView *)collectionView mouseUpInItemAtIndexPath:(NSIndexPath *)indexPath withEvent:(NSEvent *)event;
but it is not what I want.
I think, if a event moved,and up, it isn't a Click event.
only a event down and up(with moved),it is a Click.
(my English is poor,hahaha)