Question

我试图获取“ var product”数组以开始填充第一个UICollectionViewcell“ newCell”之后的单元格。 newCell将始终以相同的方式出现并始终存在。 productCell可能具有不同的名称和标签，并且可能并不总是存在。图片“产品”的数组将继续增长，我目前可以看到第二个图片，但是第一张图片被newCell collection视图单元格阻止。

var products: [itemCellContent] = {



    var eggs = itemCellContent()
    eggs.itemName = "Eggs"
    eggs.itemImageName = "eggs"
    eggs.Quantity = "1"

    var Toast = itemCellContent()
    Toast.itemName = "Bread"
    Toast.itemImageName = "bread"
    Toast.Quantity = "5"


    return [eggs, Toast]
}()

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

    if indexPath.item == 0
    {
        let newCell = collectionView.dequeueReusableCell(withReuseIdentifier: addCellID, for: indexPath) as! addProductCell


        print("Rounds corners")

        return newCell
    } else {
        let productCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellID, for: indexPath) as! productCellLayout
        productCell.backgroundColor = UIColor.rgb(red: 252, green: 252, blue: 252) //off white blue color
        productCell.layer.cornerRadius = 5
        print("Rounds corners")

        productCell.gItem = products[indexPath.item]

        //collectionview.insertIems(at: indexPaths)

        //Shadow
        productCell.layer.shadowColor = UIColor.gray.cgColor
        productCell.layer.shadowOffset = CGSize(width: 0, height: 3.0)
        productCell.layer.shadowOpacity = 0.7
        productCell.layer.shadowRadius = 2.0
        productCell.layer.masksToBounds = false
        productCell.layer.shadowPath = UIBezierPath(roundedRect: productCell.bounds, cornerRadius: productCell.contentView.layer.cornerRadius).cgPath;
        return productCell
    }
}

如果有人可以帮助我获取“ var product”数组以将第二个单元格识别为可以填充的第一个单元格，请告诉我该怎么做。

This is what I see when I run the code This is what I want to see,

谢谢！

Answer 1

因为products数组只有两项。只需在数组的开头添加一个虚拟单元格，即可修改索引为零的集合，而不会丢失其他项目。

var products: [itemCellContent] = {

    var dummyCell = itemCellContent()

    var eggs = itemCellContent()
    eggs.itemName = "Eggs"
    eggs.itemImageName = "eggs"
    eggs.Quantity = "1"

    var Toast = itemCellContent()
    Toast.itemName = "Bread"
    Toast.itemImageName = "bread"
    Toast.Quantity = "5"


    return [dummyCell, eggs, Toast]
}()

Answer 2

好的，您需要做两件事来实现这一目标。首先，返回的单元格数应比项目数多一：

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    if let _ = products {
        return products!.count + 1
    }
    return 1
}

接下来，根据上面的内容返回适当的单元格实例。

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

    if indexPath.item == 0
    {
        let newCell = collectionView.dequeueReusableCell(withReuseIdentifier: addCellID, for: indexPath) as! addProductCell


        print("Rounds corners")

        return newCell
    } else {
        let productCell = collectionView.dequeueReusableCell(withReuseIdentifier: cellID, for: indexPath) as! productCellLayout
        productCell.backgroundColor = UIColor.rgb(red: 252, green: 252, blue: 252) //off white blue color
        productCell.layer.cornerRadius = 5
        print("Rounds corners")

        productCell.gItem = products[indexPath.item - 1] // Here's a difference than before

        //collectionview.insertIems(at: indexPaths)

        //Shadow
        productCell.layer.shadowColor = UIColor.gray.cgColor
        productCell.layer.shadowOffset = CGSize(width: 0, height: 3.0)
        productCell.layer.shadowOpacity = 0.7
        productCell.layer.shadowRadius = 2.0
        productCell.layer.masksToBounds = false
        productCell.layer.shadowPath = UIBezierPath(roundedRect: productCell.bounds, cornerRadius: productCell.contentView.layer.cornerRadius).cgPath;
        return productCell
    }
}

在UICollectionView中的第二个索引项处启动Image数组

2 个答案: