ios - Perform action on selection of UICollectionViewCell? -

i call function when cell pressed , able change function based on cell pressed. here code currently:

override func numberofsectionsincollectionview(collectionview: uicollectionview) -> int {     //#warning incomplete method implementation -- return number of sections     return 4 }   override func collectionview(collectionview: uicollectionview, numberofitemsinsection section: int) -> int {     //#warning incomplete method implementation -- return number of items in section     return 10 }  override func collectionview(collectionview: uicollectionview, cellforitematindexpath indexpath: nsindexpath) -> uicollectionviewcell {     let cell = collectionview.dequeuereusablecellwithreuseidentifier(reuseidentifier, forindexpath: indexpath) as! uicollectionviewcell      // configure cell      return cell }  func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionviewlayout, sizeforitematindexpath indexpath: nsindexpath) -> cgsize {     return cgsizemake(90, 90) }  func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionviewlayout, insetforsectionatindex section: int) -> uiedgeinsets {     return uiedgeinsetsmake(10, 10, 10, 10) }  func collectionview(collectionview: uicollectionview, layout collectionviewlayout: uicollectionviewlayout, minimumlinespacingforsectionatindex section: int) -> cgfloat {     return 10 }   // mark: uicollectionviewdelegate   // uncomment method specify if specified item should highlighted during tracking override func collectionview(collectionview: uicollectionview, shouldhighlightitematindexpath indexpath: nsindexpath) -> bool {     return true }    // uncomment method specify if specified item should selected override func collectionview(collectionview: uicollectionview, shouldselectitematindexpath indexpath: nsindexpath) -> bool {     return true }    // uncomment these methods specify if action menu should displayed specified item, , react actions performed on item override func collectionview(collectionview: uicollectionview, shouldshowmenuforitematindexpath indexpath: nsindexpath) -> bool {     return true }  override func collectionview(collectionview: uicollectionview, canperformaction action: selector, foritematindexpath indexpath: nsindexpath, withsender sender: anyobject?) -> bool {     return true }  override func collectionview(collectionview: uicollectionview, performaction action: selector, foritematindexpath indexpath: nsindexpath, withsender sender: anyobject?) {     self.printthatitworked() }  func printthatitworked() {     println("it worked") } 

the function printthatitworked() should called whenever cell selected, , able have print cell number x pressed. how go doing this?

the delegate method didselectcell... want put code.

override func collectionview(collectionview: uicollectionview, didselectitematindexpath indexpath: nsindexpath) {     // can use indexpath "cell number x", or cell like:     let cell = collectionview.cellforitematindexpath(indexpath)     printthatitworked() }