ios - How to call index on UICollectionView using IBAction? -

i trying put bunch of options on uicollectionview using ibaction trigger open each option, have difficulty code should call trigger action using ibaction. here code:

@ibaction func opennewfilter(sender: anyobject) {     self.collectionview.datasource = indexpath.section == 0 }  func numberofsections() -> int {      return 2 }  func numberofitemsinsection(_ section: int) -> int {     if section == 0      {         return array.count     }      else if section == 1     {          return 1     }      else     {         return 0     } }   func cellforitematindexpath(_ indexpath: nsindexpath) -> uicollectionviewcell?    {     if indexpath.section == 0      {      }      else if indexpath.section == 1      {      } } 

i appreciate if me, thanks..!!