我目前正在开发一个类似于 IMDb 的简单应用程序，我的目标是在标头中显示电影海报和标题，这些都是从 API 中检索到的。虽然我成功地在屏幕底部显示了这些信息，但我在标题中显示相同的数据时遇到了困难。标题中没有任何内容
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import UIKit
class HomeHeader: UICollectionReusableView,ReuseProtocol,NibProtocol {
@IBOutlet weak var collection: UICollectionView!
@IBOutlet weak var topView: UIView!
@IBOutlet weak var viewBottom: UIView!
var items = [MovieResult]()
override func layoutSubviews() {
collection.registerCell(type: HorizontalCollectionViewCell.self)
}
func configure(data: [MovieResult]){
items = data
collection.reloadData()
}
}
extension HomeHeader: UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell: HorizontalCollectionViewCell = collectionView.dequeueCell(for: indexPath)
cell.configure(data: items[indexPath.item])
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width * 143 / 375
let height = collectionView.frame.height * 283 / 812
return CGSize(width: width, height: height)
}
}
ViewCell
import UIKit
import SDWebImage
class HorizontalCollectionViewCell: UICollectionViewCell,ReuseProtocol,NibProtocol {
@IBOutlet weak var movieImage: UIImageView!
@IBOutlet weak var titleLabel: UILabel!
@IBOutlet weak var ratingLabel: UILabel!
func configure(data: MovieCellProtocol){
titleLabel.text = data.titleText
ratingLabel.text = data.ratingText
movieImage.sd_setImage(with: URL(string: data.posterImage)!)
movieImage.layer.cornerRadius = 5
}
}
HomeViewController
import UIKit
class HomeViewController: UIViewController {
@IBOutlet private weak var collectionView: UICollectionView!
let viewModel = HomeViewModel()
override func viewDidLoad() {
super.viewDidLoad()
collectionSetup()
viewModelConfiguration()
}
fileprivate func collectionSetup(){
collectionView.registerCell(type: VerticalCollectionViewCell.self)
collectionView.registerSupplementaryView(type: HomeHeader.self, ofKind: UICollectionView.elementKindSectionHeader)
}
fileprivate func viewModelConfiguration(){
viewModel.getCatagoryItems()
viewModel.getNowPlaying()
viewModel.errorCallBack = { [weak self] errorMesage in
print("error: \(errorMesage)")
}
viewModel.successCallBack = { [weak self] in
self?.collectionView.reloadData()
}
}
}
extension HomeViewController:UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
// return viewModel.numberOfItems()
return viewModel.movieItems.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell: VerticalCollectionViewCell = collectionView.dequeueCell(for: indexPath)
cell.configure(data: viewModel.movieItems[indexPath.item])
return cell
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
let header: HomeHeader = collectionView.dequeueSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, for: indexPath)
header.configure(data: viewModel.nowPlayingItems)
return header
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionView.frame.width * 327 / 375, height: 120)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
CGSize(width: collectionView.frame.width, height: 365)
}
}