如何在numberofitemsinsection中管理两个不同的单元格

Question

我想用两个不同的单元格创建一个collectionView。第一个单元格应该显示一次，而第二个单元格应该在数组很大时显示一次。结果应该类似于附件链接中的图像。这也是一个示例代码，用于更好地理解我的问题。感谢所有帮助我的人！！！ 🙂

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


    switch indexpath { // No indexpath in numberofitemsinsection!
    case 0:
        return 1 //display one time the first cell
    default:
        return images.count // display as often as the array is large the second cell
    }

}

Here is the collectionView I want to create

Answer 1

您为什么不使用它？

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 1 + theArray.count
}

Answer 2

您可以在cellForItemAt内部实现此功能，并且需要像下面这样更改numberOfItemsInSection：

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    // return 1 more than our data array (the extra one will be the "add item" cell)
    return dataSourceArray.count + 1
}

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

    // if indexPath.item is less than data count, return a "Content" cell
    if indexPath.item < dataSourceArray.count {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ContentCell", for: indexPath) as! ContentCell

        cell.customWishlistTapCallback = {    
        }

        return cell
    }

    // past the end of the data count, so return an "Add Item" cell
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "AddItemCell", for: indexPath) as! AddItemCell

    //MARK: addList-Cell-Tapped
    // set the closure
    cell.tapCallback = {


    }     
    return cell

}

为此，您需要创建ContentCell和AddItemCell，并且还具有dataSourceArray来存储所需的所有数据。