尝试UICollectionView使用compositionalLayout. 它适用于集合视图单元格，但是当我尝试添加标题时，它会因注册笔尖错误而崩溃：
由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“无法使类型视图出列：SectionHeaderElementKind 标识符为 headerView - 必须为标识符注册一个 nib 或类或连接情节提要中的原型单元格”
视图控制器的代码实现：
class ViewController: UIViewController {
@IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
collectionView.register(UINib(nibName: "CollectionReusableView", bundle: nil), forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, withReuseIdentifier: "headerView")
collectionView.register(UINib(nibName: "CollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "cellIdentifier")
collectionView.collectionViewLayout = customLayout()
}
func customLayout() -> UICollectionViewLayout {
let size = NSCollectionLayoutSize(
widthDimension: NSCollectionLayoutDimension.fractionalWidth(1),
heightDimension: NSCollectionLayoutDimension.estimated(44)
)
let item = NSCollectionLayoutItem(layoutSize: size)
let group = NSCollectionLayoutGroup.horizontal(layoutSize: size, subitem: item, count: 1)
let headerSize = NSCollectionLayoutSize(
widthDimension: .fractionalWidth(1.0),
heightDimension: .absolute(40)
)
let sectionHeader = NSCollectionLayoutBoundarySupplementaryItem(
layoutSize: headerSize,
elementKind: "SectionHeaderElementKind",
alignment: .top
)
let section = NSCollectionLayoutSection(group: group)
section.boundarySupplementaryItems = [sectionHeader]
let layout = UICollectionViewCompositionalLayout(section: section)
return layout
}
}
extension ViewController: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellIdentifier", for: indexPath) as! CollectionViewCell
return cell
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
let cell = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "headerView", for: indexPath) as! CollectionReusableView
return cell
}
}
我创建的标题视图：
class CollectionReusableView: UICollectionReusableView {
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
}
如果我在这里遗漏了什么，请帮忙。