UICollectionView with Custom Cell Breaking UICollectionViewDataSource Protocol - ios

Question

I am trying to use a UICollectionView with a custom cell. My ViewController inherits from UICollectionViewDataSource as below:
import UIKit
import Parse
class DressingRoomViewController: UIViewController,
UICollectionViewDelegateFlowLayout,
UICollectionViewDataSource {
That inheritance is causing me to break a protocol of UICollectionViewDataSource with my UICollectionView function that creates and returns the custom cell. This is the function:
func collectionView(collectionView: UICollectionView,
cellForItemAtIndexPath indexPath: NSIndexPath)
-> CustomCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(
identifier,forIndexPath:indexPath) as! CustomCell
let dressingRoomIcons: [DressingRoomIcon] =
dataSource.dressingRoomIcons
let dressingRoomIcon = dressingRoomIcons[indexPath.row]
var imageView: MMImageView =
createIconImageView(dressingRoomIcon.name!)
cell.setImageV(imageView)
return cell
}
So before compilation the error is shown in the IDE. How do I get around this error? Here are the two errors I am experiencing:
Type 'DressingRoomViewController' does not conform to protocol
'UICollectionViewDataSource'
Cannot assign a value of type 'DressingRoomViewController' to a value
of type 'UICollectionViewDataSource?'
Here is the whole ViewController:
import UIKit
import Parse
class DressingRoomViewController: UIViewController,
UICollectionViewDelegateFlowLayout,
UICollectionViewDataSource {
#IBOutlet weak var MirrorImageView: UIImageView!
#IBOutlet weak var collectionView: UICollectionView!
#IBOutlet weak var heightConstraint: NSLayoutConstraint!
let identifier = "cellIdentifier"
let dataSource = DataSource()
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
let cellSpacing: CGFloat = 5
let cellsPerRow: CGFloat = 6
let numberOfItems = 12
override func viewDidLoad() {
super.viewDidLoad()
collectionView.dataSource = self
}
override func viewDidAppear(animated: Bool) {
let cellSize = (collectionView.collectionViewLayout
.collectionViewContentSize().width
/ cellsPerRow)
- (cellSpacing)
layout.itemSize = CGSize(width: cellSize, height: cellSize)
layout.minimumInteritemSpacing = cellSpacing
layout.minimumLineSpacing = cellSpacing
layout.scrollDirection = UICollectionViewScrollDirection.Horizontal
collectionView.collectionViewLayout = layout
self.heightConstraint.constant = cellSize
self.view.layoutIfNeeded()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func prepareForSegue( segue: UIStoryboardSegue,
sender: AnyObject?) {
if (segue.identifier == "dressingRoom2MyOutfits") {
let myOutfitsViewController = segue.destinationViewController
as! MyOutfitsViewController
} else if (segue.identifier == "dressingRoom2StickerPicker") {
let myStickerPickerController = segue.destinationViewController
as! StickerPickerViewController
}
}
func imageTapped(sender: UITapGestureRecognizer) {
var imageView = sender.view as! MMImageView
println(imageView.fname)
performSegueWithIdentifier( "dressingRoom2StickerPicker",
sender: imageView)
}
}
// MARK:- UICollectionViewDataSource Delegate
extension DressingRoomViewController : UICollectionViewDataSource {
func numberOfSectionsInCollectionView(
collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(collectionView: UICollectionView,
numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(collectionView: UICollectionView,
cellForItemAtIndexPath indexPath: NSIndexPath)
-> CustomCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(
identifier,forIndexPath:indexPath) as! CustomCell
let dressingRoomIcons: [DressingRoomIcon] =
dataSource.dressingRoomIcons
let dressingRoomIcon = dressingRoomIcons[indexPath.row]
var imageView: MMImageView =
createIconImageView(dressingRoomIcon.name!)
cell.setImageV(imageView)
return cell
}
func createIconImageView(name: String) -> MMImageView{
var imageView :MMImageView =
MMImageView(frame:CGRectMake( 0,
0,
(collectionView.collectionViewLayout
.collectionViewContentSize().width / cellsPerRow)
- (cellSpacing),
(collectionView.collectionViewLayout
.collectionViewContentSize().width / cellsPerRow)
- (cellSpacing)))
imageView.contentMode = UIViewContentMode.ScaleAspectFit
imageView.image = UIImage(named: name)
imageView.setName(name)
imageView.backgroundColor = UIColor.clearColor()
imageView.userInteractionEnabled = true
var tapGestureRecognizer =
UITapGestureRecognizer(target: self, action: "imageTapped:")
tapGestureRecognizer.numberOfTapsRequired = 1
imageView.addGestureRecognizer(tapGestureRecognizer)
return imageView
}
}
EDIT: Here is my CustomCell:
import Foundation
import UIKit
class CustomCell: UICollectionViewCell {
var imageView = MMImageView()
func setImageV(IV: MMImageView) {
self.imageView = IV
}
}

Answer 1

Replace this Code
func collectionView(collectionView: UICollectionView,
cellForItemAtIndexPath indexPath: NSIndexPath)
-> UICollectionViewCell {
Instead of below this :
func collectionView(collectionView: UICollectionView,
cellForItemAtIndexPath indexPath: NSIndexPath)
-> CustomCell {
You can return custom cell but you can't change return type of any DataSource or Delegate method.