ios - Collection View 显示 cellForItemAt 中的单元格数量较少

Question

我有一个包含 5 个项目的 Collection View ，如下所示:

var photos = [String]()
 override func viewDidLoad() {
        super.viewDidLoad()
 self.photos = ["background", "living", "bedroom", "dining","bathroom"]
}

在 Collection View 中

 func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        print("total no of photos are",photos.count)
        return photos.count

    }
       func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell = photocollview.dequeueReusableCell(withReuseIdentifier: "Cell10", for: indexPath) as! PhotoCollectionViewCell


        cell.layer.borderColor = UIColor.black.cgColor
        cell.layer.borderWidth = 1.0


        let str = photos[indexPath.row]

        print("str is",str)

}

Collection View 中部分中的项目数显示为 5，但在 cellforitemat 中显示

str 在打印时仅显示 3 个值。

可能是什么问题？

Answer 1

调用也返回，也许它有帮助。

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
   let cell = photocollview.dequeueReusableCell(withReuseIdentifier: "Cell10", for: indexPath) as! PhotoCollectionViewCell
   cell.layer.borderColor = UIColor.black.cgColor
   cell.layer.borderWidth = 1.0
   let str = photos[indexPath.row]
   print("str is",str)
   return cell
}