我有一个 TableView ,我在单元格中放置了一个 Collection View ,我从 API 获取数据并将这些数据传递给 TableView 和 Collection View ,但是当我运行该应用程序时它崩溃并出现此错误,
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Lawon.KnowledgeVC collectionView:numberOfItemsInSection:]: unrecognized selector sent to instance 0x7fa90af0cbc0
我的表格 View 代码,
extension KnowledgeVC : UITableViewDelegate,UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return categoryArray.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return categoryArray.count
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 35
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let headerView = Bundle.main.loadNibNamed("KnowledgeHeaderTVC", owner: self, options: nil)?.first as! KnowledgeHeaderTVC
headerView.categoryNameLbl.text = categoryArray[section].catName
headerView.articlesLbl.text = "\(categoryArray[section].blogArray.count)" + "articles"
return headerView
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = knowledgeTableView.dequeueReusableCell(withIdentifier: "KnowledgeCell", for: indexPath) as! KnowledgeDetailTVC
cell.categoryArray = categoryArray
return cell
}
}
这是我的 TableView 单元格类,其中我有用于收集 View 和填充数据并调用其委托(delegate)和数据源的疯狂导出,
class KnowledgeDetailTVC: UITableViewCell,UICollectionViewDelegate, UICollectionViewDataSource {
@IBOutlet weak var categoryCollectionView : UICollectionView!
var categoryArray = [Category]()
override func awakeFromNib() {
super.awakeFromNib()
self.categoryCollectionView.reloadData()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
print(categoryArray[section].blogArray.count)
return categoryArray[section].blogArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "familyCell", for: indexPath) as! FamilyCVC
cell.categoryLbl.text = categoryArray[indexPath.section].blogArray[indexPath.row].articleTitle
let imageUrl = categoryArray[indexPath.section].blogArray[indexPath.row].imageUrl!
print(imageUrl)
cell.categoryImage.sd_setImage(with: URL(string: imageUrl), placeholderImage: UIImage(named: "person.jpeg"))
// cell.bgView.layer.masksToBounds = true
// cell.bgView.layer.shadowColor = UIColor.black.cgColor
// cell.bgView.layer.shadowOpacity = 3
// cell.bgView.layer.shadowOffset = CGSize(width: -1, height: 1)
// cell.bgView.layer.shadowRadius = 2
// cell.bgView.layer.shouldRasterize = true
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
}
}
最佳答案
您可以将原型(prototype)单元格中 collectionView 的委托(delegate)和数据源设置为 IB 中的 KnowledgeVC
,而实现在单元格内,但您应该将它们设置在 awakeFromNib
中
self.categoryCollectionView.delegate = self
self.categoryCollectionView.dataSource = self
self.categoryCollectionView.reloadData()
另外最好在 cellForRowAt
中刷新它以避免出队问题
cell.categoryArray = categoryArray
cell.categoryCollectionView.reloadData()
There is no compile time error thrown in that case and that is a big problem of setting the delegate and dataSource in IB
关于ios - 在 iOS 的 TableView 单元格中显示 Collection View 的问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56601708/