UICollectionViewCell无法为CustomCollectionViewCell

Question

我创建了一个自定义UICollectionViewCell，我尝试从UICollectionView delegate方法cellForItemAtIndexPath引用它，我不断获取Cannot assign value of type 'UICollectionViewCell' to type 'GridViewCell'

委托方法

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let asset = self.assetsFetchResults[indexPath.item] as! PHAsset
    var cell = GridViewCell()

    //Deque an GridViewCell
    cell = collectionView.dequeueReusableCellWithReuseIdentifier(CellReuseIdentifier, forIndexPath: indexPath)
    cell.representedAssetIdentifier = asset.localIdentifier


    return cell
}

GridViewCell类

import UIKit

class GridViewCell: UICollectionViewCell {

@IBOutlet weak var imageView: UIImageView!
var thumbnailImage = UIImage()
var representedAssetIdentifier = NSString()

override func prepareForReuse() {
    super.prepareForReuse()
    self.imageView.image = nil
}

//func setThumbnailImage(thumbnailImage: UIImage) {
//    self.imageView.image = thumbnailImage
//}
}

Answer 1

替换

cell = collectionView.dequeueReusableCellWithReuseIdentifier(CellReuseIdentifier, forIndexPath: indexPath)

使用

cell = collectionView.dequeueReusableCellWithReuseIdentifier(CellReuseIdentifier, forIndexPath: indexPath) as! GridViewCell