在集合视图中滚动后，单元格不显示-Swift 2.1

Question

主控制器

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

我认为这是您如何使用它们的方式，尝试使用图像定义数组：

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

并在cellForItemAtIndexPath使用它：

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

确保将DataSoruce和Delegate for collectionView从连接检查器连接到视图控制器中，以加载数据，并确保放置正确的图像名称。

Answer 2

使用以下代码。 无法显示图片的原因是您未提及图片扩展名为jpg或png的图片...您的计数器值为“ 1”，因此应用无法加载没有扩展名png或jpg的图片名称1 ：

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

}