Swift：numberOfSectionsInCollectionView 不工作？

Question

好的，我在 collection 视图上遇到了问题。这就是我试图实现的目标 - 1 个大的 MAIN header 和页脚，然后嵌套在里面需要一些数字（例如：4）部分，它们都只有 HEADERS。像这样：

header 主要

------
tiny header 1
------
[a][b][c]

------
tiny header 2
------
[a][b][c]

页脚主要

看到类似的答案，我首先尝试创建不同的小节，因为现在我只有所有 collection 视图单元格和一个大页脚和 header。问题是无论我有什么，我只剩下 1 个部分：

 func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
        return 4
    }

我不知道为什么。我从情节提要中获取 collection 视图并将其设置为：

@IBOutlet var collectionView: UICollectionView!
self.collectionView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0) //-44
        self.collectionView.backgroundColor = UIColor.white


func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {

        switch kind {

        case UICollectionElementKindSectionHeader:

            let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "headerCell", for: indexPath as IndexPath) as! HeaderCollectionReusableView

           header = headerView
            return headerView

        case UICollectionElementKindSectionFooter:
            let footerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "footerCell", for: indexPath as IndexPath) as! FooterCollectionReusableView
            //footerView.center = CGPoint(x: footerView.center.x, y: footerView.center.y + 100)

            return footerView

        default:

            assert(false, "Unexpected element kind")
        }
    }

    // ADD STICKER TO CELL
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "stickerCell", for: indexPath as IndexPath) as! StickerCollectionViewCell

        cell.backgroundColor = UIColor.blue

        cell.initSticker(stickerView: stickerPack[indexPath.item])
        cell.stickerName = (stickerPack[indexPath.item].sticker?.localizedDescription)!
        cell.initLabels()

        stickerNames.append(cell.stickerName)
        cell.hasSticker = true;

        //HERE MODIFY SPACING ---------------------------------------
        //then for overflow just increase bottom inset?
        //cell.center = CGPoint(x: cell.center.x, y: cell.center.y+100)

        return cell
    }

我该怎么做？为什么当我有 4 个元素要进入单元格时我只有 1 个部分，而当我将 "number items in section" 设置为 4 时它们都显示在那里？

我做错了什么？

Answer 1

Problem is no matter what I have for this, I remain with only 1 section.

这是因为在Swift3中需要去掉方法名的后缀部分，只留下numberOfSections，即

func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 4
}

Swift：numberOfSectionsInCollectionView 不工作？

Swift: numberOfSectionsInCollectionView not working?

collectionview

ios

uicollectionviewcell

swift3

header 主要

页脚主要