ios - Programmatically adding UIImage into collection view cell -

this custom class collection view cell:

import uikit  class navbarcell: uicollectionviewcell {      var avatarimageview: uiimageview = {         var avatarview = uiimageview()         avatarview.contentmode = .scaleaspectfit          return avatarview     }()      override init(frame: cgrect) {         super.init(frame: frame)          avatarimageview = uiimageview()         contentview.addsubview(avatarimageview)     }      required init?(coder adecoder: nscoder) {         fatalerror("init(coder:) has not been implemented")     }  } 

then in viewdidload of controller have

    let layout:uicollectionviewflowlayout = uicollectionviewflowlayout.init()     navbarcollectionview.setcollectionviewlayout(layout, animated: true)     navbarcollectionview.backgroundcolor = uicolor.clear     navbarcollectionview.register(navbarcell.self, forcellwithreuseidentifier: "cell")     navbarcollectionview.delegate = self     navbarcollectionview.datasource = self     layout.scrolldirection = .horizontal     self.navigationcontroller?.navigationbar.addsubview(navbarcollectionview)     navbarcollectionview.reloaddata() 

and in cellforitem have:

        let navbarcell = (collectionview.dequeuereusablecell(withreuseidentifier: "cell", for: indexpath)) as! navbarcell          var image : uiimage = uiimage(named: "testimage")!         navbarcell.avatarimageview.image = image         navbarcell.avatarimageview.layer.borderwidth = 1         navbarcell.avatarimageview.layer.bordercolor = uicolor.getrandomcolor().cgcolor         navbarcell.avatarimageview.layer.cornerradius = 20          return navbarcell 

but image views not showing up. if add navbarcell.backgroundcolor = uicolor.red cells show up, not images.

anything i'm missing, or not implementing correctly?

uicollectionviewcell view, can add avatarimageview directly it:

addsubview(avatarimageview) 

you can set constraints, example:

avatarimageview.translatesautoresizingmaskintoconstraints = false avatarimageview.topanchor.constraint(equalto: topanchor).isactive = true avatarimageview.leftanchor.constraint(equalto: leftanchor).isactive = true avatarimageview.rightanchor.constraint(equalto: rightanchor).isactive = true avatarimageview.heightanchor.constraint(equaltoconstant: 300).isactive = true