Question

我有一个问题是在我的集合视图中添加额外的单元格我已经改变了使用数据模型来填充我的单元格的逻辑

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


    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("images", forIndexPath: indexPath) as! ProfileImageCell

        let picture = pictures[indexPath.item] as! Gallery

        print(indexPath.item)

        if indexPath.item == pictures.count {
            cell.image.image = UIImage(named: "ProfilePlusImage")
        } else {
            cell.image.sd_setImageWithURL(NSURL(string: picture.fileUrl), placeholderImage: UIImage(named: "Placeholder"))
            cell.imageId = picture.id.integerValue
        }

        return cell
    }

问题出在这一行我认为

让picture = pictures [indexPath.item]为！廊

当我标记并标记

时

cell.image.sd_setImageWithURL（NSURL（string：picture.fileUrl）， placeholderImage：UIImage（名称：“占位符”））

在第11位添加额外的细胞。但其他方式让我超越界限

有人可以帮助我吗？

Answer 1

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("images", forIndexPath: indexPath) as! ProfileImageCell

    print(indexPath.item)

    if indexPath.item == pictures.count {
        cell.image.image = UIImage(named: "ProfilePlusImage")
    } else {
        let picture = pictures[indexPath.item] as! Gallery

        cell.image.sd_setImageWithURL(NSURL(string: picture.fileUrl), placeholderImage: UIImage(named: "Placeholder"))
        cell.imageId = picture.id.integerValue
    }

    return cell
}

Answer 2

您的CollectionView似乎有一个部分，因此此代码应该可以使用

func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 2
}

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    if section == 0 {
        return 1
    }
    return pictures.count
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("images", forIndexPath: indexPath) as! ProfileImageCell

    let picture = pictures[indexPath.item] as! Gallery

    print(indexPath.item)


    if indexPath.section == 0 {
        cell.image.image = UIImage(named: "ProfilePlusImage")
    } else {
        cell.image.sd_setImageWithURL(NSURL(string: picture.fileUrl), placeholderImage: UIImage(named: "Placeholder"))
        cell.imageId = picture.id.integerValue
    }

    return cell
}

CollectionView添加额外的单元格“添加更多”

2 个答案: