在集合视图中滚动后，单元格不显示-Swift 2.1

Question

Main Controller

class MainController: UIViewController,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {

@IBOutlet weak var collectionView: UICollectionView!

let reUseCellName = "imgCell"

var counter = 1

override func viewDidLoad() {
    super.viewDidLoad()
}   

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reUseCellName, forIndexPath:indexPath) as! CellClass

        cell.imageView.image = UIImage(named: "\(counter)")
        cell.imgName = counter
        counter++
        return cell
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {       
 let newView = segue.destinationViewController as! showImage
 let cell = sender as! CellClass        
    newView.imgNo = cell.imgName        
}

Answer 1

I think its the way how your using them, try to define an array with images:

var arrayOfImages = ["1","2","3","4"]

And use it in cellForItemAtIndexPath :

cell.imageView.image = UIImage(named: arrayOfImages[indexPath.row])

Be sure to connect DataSoruce and Delegate for collectionView from connection inspector into your view controller to have the data loaded, and be sure to place the right image names.

Answer 2

Use the following code . the reason for the image not being displayed is the you have not mentioned the file extension with the image as jpg or png ... your counter value is "1" so app cannnot load the image name 1 without extension png or jpg Use this code :

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reUseCellName, forIndexPath:indexPath) as! CellClass

    cell.imageView.image = UIImage(named: "Complete image name with .png/.jpg")
    cell.imgName = counter
    counter++
    return cell

}