我需要一点帮助。我正在尝试使用UICollectionViewCell
(item)和UICollectionReusableView
(header)的自定义布局来创建带有标头部分的UICollectionView。在标头之前,一切工作正常,但是现在由于某种原因,我总是遇到此错误:
Terminating app due to uncaught exception 'NSInternalInconsistencyException',
reason:
'could not dequeue a view of
kind: UICollectionElementKindCell with identifier ProductCellView - must register
a nib or a class for the identifier or connect a prototype cell in a storyboard'
我已经在CollectionView中注册了这两个文件。这是我的代码:
override func viewDidLoad() {
super.viewDidLoad()
productsCollectionView.delegate = self
productsCollectionView.dataSource = self
productsCollectionView.register(UINib(nibName: "SectionHeader", bundle: nil), forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "CollectionReusableView");
productsCollectionView.register(UINib(nibName: "HomeProductViewCell", bundle: nil), forCellWithReuseIdentifier: "ProductCellView")
}
现在我将发布一个代码块,该代码块用于处理标头部分的视图并导致崩溃。如果我注释那部分代码,则集合视图将显示没有标题的常规项目。在这里:
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
//1
switch kind {
//2
case UICollectionElementKindSectionHeader:
//3
if let sectionHeader = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "CollectionReusableView", for: indexPath) as? SectionHeader{
sectionHeader.categoriesCollectionView.register(UINib(nibName: "CategoryViewCell", bundle: nil), forCellWithReuseIdentifier: "CategoryViewCell")
sectionHeader.homeImagesCollectionView.register(UINib(nibName: "HomeImageViewCell", bundle: nil), forCellWithReuseIdentifier: "HomeImageViewCell")
sectionHeader.homeImagesCollectionView.delegate = self
sectionHeader.homeImagesCollectionView.dataSource = self
sectionHeader.categoriesCollectionView.delegate = self
sectionHeader.categoriesCollectionView.dataSource = self
// Add icon to button
let icon = UIImage(named: "magnifying-glass")!
sectionHeader.btnSearch.setImage(icon, for: .normal)
sectionHeader.btnSearch.imageEdgeInsets = UIEdgeInsets(top: 0, left: 15, bottom: 0, right: 20)
sectionHeader.btnSearch.titleEdgeInsets = UIEdgeInsets(top: 0, left: 30, bottom: 0, right: 0)
sectionHeader.btnSearch.imageView?.contentMode = .scaleAspectFit
sectionHeader.btnSearch.layer.cornerRadius = 4
sectionHeader.prepareCategories()
sectionHeader.prepareHomeImages()
return sectionHeader
}
default:
//4
assert(false, "Unexpected element kind")
}
return UICollectionReusableView()
}
所以我在这里真的很绝望,因为我已经损失了将近两天的时间来寻找错误的原因。如果有人指出正确的方向寻找错误,我将不胜感激,因为我已经尝试了几乎所有我知道的东西。
答案 0 :(得分:1)
问题出在内部集合中,因为您在此处设置了委托和数据源
sectionHeader.homeImagesCollectionView.delegate = self
sectionHeader.homeImagesCollectionView.dataSource = self
sectionHeader.categoriesCollectionView.delegate = self
sectionHeader.categoriesCollectionView.dataSource = self
它要求
if let sectionHeader = collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "CollectionReusableView", for: indexPath) as? SectionHeader{
所以您必须将整个部分包装在集合类型中
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
if collectionView == mainCollection {
}
else
if collectionView == homeImagesCollectionView {
}
else { // categoriesCollectionView
}
}
BTW寄存器应位于VC内部的viewDidLoad
内部,并且应位于collectionCell自定义类的init
/ awakeFromnib
中
答案 1 :(得分:0)
在注册笔尖之前获取数据并重新加载表格视图时,我遇到了类似的问题。鉴于您提供的信息,这是我最好的答案。