ios - Subclassing UICollectionViewCell and initialising from xib -

i registering cell this:

collectionview!.registernib(uinib(nibname: "itemcell", bundle: nil), forcellwithreuseidentifier: "itemcellidentifier") 

and accessing this:

let cell = collectionview.dequeuereusablecellwithreuseidentifier("itemcellidentifier", forindexpath: indexpath) as! itemcell 

itemcell subclass of uicollectionviewcell:

class itemcell: uicollectionviewcell {      @iboutlet weak var itemimage: uiimageview!     @iboutlet weak var itemimagedescription: uilabel!      //creation nib requires method overridden     override func awakefromnib() {         super.awakefromnib()         // initialization code     }      required init(coder adecoder: nscoder) {         super.init(coder: adecoder)     } } 

finally have xib uicollectionviewcell class itemcell.

i keep getting error:

assertion failure in -[uicollectionview _dequeuereusableviewofkind:withidentifier:forindexpath:viewcategory:], /sourcecache/uikit/uikit-3347.44.2/uicollectionview.m:3443.

the crash on line:

let cell = collectionview.dequeuereusablecellwithreuseidentifier("itemcellidentifier", forindexpath: indexpath) as! itemcell 

edit

collectionview!.registernib(uinib(nibname: "itemcell", bundle: nil), forcellwithreuseidentifier: "itemcellidentifier") 

is called from

override init(style: uitableviewcellstyle, reuseidentifier: string?) {     super.init(style: style, reuseidentifier: reuseidentifier)  } 

contained in:

class collectioncell : uitableviewcell, uicollectionviewdatasource, uicollectionviewdelegate { 

where calling registernib?

i reproduced setup match can tell yours.

this works me, no errors :

import uikit  class viewcontroller: uiviewcontroller, uicollectionviewdatasource, uicollectionviewdelegate {      var model:[string] = []      @iboutlet weak var collectionview: uicollectionview!      override func viewdidload() {         super.viewdidload()          // simple test model ...         index in 1...100 {             model.append("\(index)")         }          // register nib         collectionview.registernib(uinib(nibname: "itemcell", bundle: nil), forcellwithreuseidentifier: "itemcell")          // test layout         var layout = uicollectionviewflowlayout()         layout.itemsize = cgsize(width:200.0,height:200.0)         layout.scrolldirection = uicollectionviewscrolldirection.vertical         self.collectionview.collectionviewlayout = layout         self.collectionview.delegate = self;         self.collectionview.datasource = self;         self.collectionview.reloaddata()     }      // mark: -  uicollectionviewdatasource     func collectionview(collectionview: uicollectionview,         numberofitemsinsection section: int) -> int{             return model.count     }      func collectionview(collectionview: uicollectionview,         cellforitematindexpath indexpath: nsindexpath) -> uicollectionviewcell{             var cell:uicollectionviewcell = collectionview.dequeuereusablecellwithreuseidentifier("itemcell", forindexpath: indexpath) as! uicollectionviewcell             return cell     } }