我有一个colectionView，它显示57个项目，但我希望将这些项目分成小组，每个组都有一个Header部分。这些项目以数组的形式设置，每个ID的ID为1到57。如何将这些项目分类为带有标题的节，例如从项目1到项目7，依此类推？
我的CollectionView代码是：
extension OLLViewController: UICollectionViewDataSource, UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { //set the amount of items in the CollectionView to the amount of items in the OLLData dictionary
if (section == 2) {
return 2
}
return 0
//return OLLData.OLLCasesList.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { //set each cell to a different mamber of the dict.
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "OLLCell", for: indexPath) as! OLLCell
cell.imageView.backgroundColor = OLLData.OLLCasesList[indexPath.item]._isSelected ? UIColor.init(red: 101.0/255.0, green: 177.0/255.0, blue: 94.0/255.0, alpha: 0.9) : UIColor.clear //change colour if selected
let image = OLLData.OLLCasesList[indexPath.item]._imageName
cell.label.text = image
cell.imageView.image = UIImage(named: image)
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { //detect if case selected and reload CollectionView
let caseName = OLLData.OLLCasesList[indexPath.item]._imageName
print(caseName, OLLData.OLLCasesList[indexPath.item]._isSelected)
OLLData.OLLCasesList[indexPath.item]._isSelected = !OLLData.OLLCasesList[indexPath.item]._isSelected
collectionView.reloadItems(at:[indexPath])
if OLLData.OLLCasesList[indexPath.item]._isSelected == true { //if the item is selected, add to selectedCases array
selectedCases.append(OLLData.OLLCasesList[indexPath.item]._id)
selectedCaseNames.append(OLLData.OLLCasesList[indexPath.item]._imageName)
print(selectedCases, selectedCaseNames) //debugging
numberOfSelectedCases.text = String(selectedCases.count)
}
else if OLLData.OLLCasesList[indexPath.item]._isSelected == false { //remove from selectedCases array
selectedCases.removeAll(where: { $0 == OLLData.OLLCasesList[indexPath.item]._id })
selectedCaseNames.removeAll(where: { $0 == OLLData.OLLCasesList[indexPath.item]._imageName })
print(selectedCases, selectedCaseNames) //debugging
numberOfSelectedCases.text = String(selectedCases.count)
}
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 2
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
var reusableView = UICollectionReusableView()
if (kind == UICollectionView.elementKindSectionHeader) {
let section = indexPath.section
switch(section) {
case 1:
let firstHeader : HeaderReusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "OLLHeaderView", for: indexPath) as! HeaderReusableView
reusableView = firstHeader
case 2:
let secondHeader : HeaderReusableView = collectionView.dequeueReusableSupplementaryView(ofKind: "", withReuseIdentifier: "OLLHeaderView", for: indexPath) as! HeaderReusableView
reusableView = secondHeader
default:
return reusableView
}
}
return reusableView
}
}
有什么方法可以做到这一点？