ios - CollectionView objects (Swift) -

i want highlight change size , appearance of object inside collection view.

how can set object properties in collection view cell, within "didhighlight" method?

in "cellforitematindexpath" declare reusable cells class

and use "cell.myoutlet.backgroundcolor = uicolor.bluecolor()"

func collectionview(collectionview: uicollectionview, cellforitematindexpath indexpath: nsindexpath) -> uicollectionviewcell {                    if collectionview == self.collectionviewcontroller {              let (friendfirstname,friendlastname) = friends[indexpath.row]                    let cell: customcella = collectionview.dequeuereusablecellwithreuseidentifier("democell", forindexpath: indexpath) as! customcella                        if indexpath.section == 0 {                  cell.celltitle.text = name                  cell.imgcell.image = uiimage(named: pics[indexpath.row])                                cell.imgcell.layer.maskstobounds = true                  cell.self.imgcell.layer.cornerradius = 20                                    return cell                                                  } else {                                let cell2: addcell = collectionview.dequeuereusablecellwithreuseidentifier("democell2", forindexpath: indexpath) as! addcell                  return cell2              }          } else if collectionview == self.emojicollectionviewcontroller {              let cellb: customcellb = collectionview.dequeuereusablecellwithreuseidentifier("democellb", forindexpath: indexpath) as! customcellb                            cellb.mylabel.text = arrayone[indexpath.row]                            return cellb                        } else {              let cellc: customcellc = collectionview.dequeuereusablecellwithreuseidentifier("democellc", forindexpath: indexpath) as! customcellc                            // ...set cell              let height = self.collectionviewcontroller2.frame.height                            cellc.frame = cgrectmake(cellb.frame.origin.x, 0, cellb.frame.size.width, height)              cellc.updateconstraintsifneeded()              cellc.layoutifneeded()              cellc.imgvw.image = uiimage(named: pictures[indexpath.row] as! string)                return cellc          }                }

          func collectionview(collectionview: uicollectionview, didhighlightitematindexpath indexpath: nsindexpath) {                    if collectionview == self.collectionviewcontroller {                        if indexpath.section == 0 {                  let cell: customcella = customcellb()                  cell.mylabel.backgroundcolor = uicolor.bluecolor()  //crashes due nil value)                }                    } else {                                      }                          }

i tried using similar definition in didhighlight , keeps crashing.

let didhighlightitematindexpath change data, not view. so, make friends[indexpath.row] object or add parameter tuple. , in didhighlightitematindexpath following:

 if collectionview == self.collectionviewcontroller {      if indexpath.section == 0 {         let (fname, lname, color) = friends[indexpath.row];          friends[indexpath.row] = (fname, lname, uicolor.bluecolor())      }       } 

and in cellforitematindexpath:

if collectionview == self.collectionviewcontroller {     let (friendfirstname, friendlastname, color) = friends[indexpath.row]      if indexpath.section != 0 {         let cell = collectionview.dequeuereusablecellwithreuseidentifier("democell2", forindexpath: indexpath) as! addcell;         return cell;     } else if color == nil {         let cell = collectionview.dequeuereusablecellwithreuseidentifier("democell", forindexpath: indexpath) as! customcella;          cell.celltitle.text = name         cell.imgcell.image = uiimage(named: pics[indexpath.row])          cell.imgcell.layer.maskstobounds = true         cell.self.imgcell.layer.cornerradius = 20          return cell     } else {         cell = collectionview.dequeuereusablecellwithreuseidentifier("democellb", forindexpath: indexpath) as! customcellb;          // code customcellb          return cell;     }  }  

edit: updated, instead of objects uses tuples. added functionality need. basically, need create 2 prototype cells in interface builder different reuse identifiers , classes. , dequeue correct identifier in index path. also, refactored of code , if create different function each collectionview , like:

if collectionview == self.collectionviewcontroller {     return self.dequeuecollectioncell(indexpath); } else if collectionview == self.emojicollectionviewcontroller {     return self.dequeuemojicell(indexpath); } else {     return self.dequeuesomeothercell(indexpath); } 

also, code provided... hope not actual production code , changed values forum. otherwise, in couple of days even, going lost in happening here. many inconsistent variable names , identifiers.

one more also. use naming conventions in class names. read forum post more information. apple uses camelcase everywhere. in majority of instances, first letter capitalized class names, not object names.