初始化播放器变量时遇到麻烦。我尝试使用init方法引发错误。问题是视频的多个实例，当我再次将应用程序放在背景和前景上时，视频开始同时播放（从当前单元格以及从顶部和底部到当前单元格）。
在DidEndDisplay上，我尝试过-传递nil URL并删除playerView，传递nil url不会更改实例，并且不允许“ var player = nil”->“不能将Player分配为nil”。如果我删除了didEndDisplay上的player.view并将其添加为willDisplay上的子视图，则结果是player.view没有被添加为子视图，因此速度很快，只能听到声音。即破坏功能
题 1.我在哪里初始化播放器。 2.我应该使用Collection View的哪些功能取消初始化，以及如何？
以下是代码 我的自定义收藏单元
import UIKit
import Player
class HomeCell: UICollectionViewCell {
let player = Player()
@IBOutlet weak var playerView: UIView!
// MARK: - OtherOutlet Variables
func removeVideo() {
self.player.asset = nil
self.player.url = nil
}
func playerInitialization() {
print("playerInitialization")
self.player.playerDelegate = self
self.player.playbackDelegate = self
self.playerView.addSubview(self.player.view)
player.view.translatesAutoresizingMaskIntoConstraints = false
player.view.topAnchor.constraint(equalTo: playerView.topAnchor).isActive = true
player.view.leadingAnchor.constraint(equalTo: playerView.leadingAnchor).isActive = true
player.view.trailingAnchor.constraint(equalTo: playerView.trailingAnchor).isActive = true
player.view.bottomAnchor.constraint(equalTo: playerView.bottomAnchor).isActive = true
self.player.fillMode = .resizeAspectFill
self.player.playbackLoops = false
let tapGestureRecognizer: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleTapGestureRecognizer(_:)))
self.player.view.addGestureRecognizer(tapGestureRecognizer)
tapGestureRecognizer.numberOfTapsRequired = 1
}
override func prepareForReuse() {
super.prepareForReuse()
}
func populate(videoUrl:String){
print(videoUrl)
self.player.url = URL(string:videoUrl)
}
}
extension HomeCell {
@objc func handleTapGestureRecognizer(_ gestureRecognizer: UITapGestureRecognizer) {
switch self.player.playbackState {
case .stopped:
self.player.playFromBeginning()
break
case .paused:
self.player.playFromCurrentTime()
break
case .playing:
self.player.pause()
break
case .failed:
self.player.pause()
break
}
}
}
// MARK: - PlayerDelegate
extension HomeCell: PlayerDelegate {
func playerReady(_ player: Player) {
// print("\(#function) ready")
}
func playerPlaybackStateDidChange(_ player: Player) {
// print("\(#function) \(player.playbackState.description)")
}
func playerBufferingStateDidChange(_ player: Player) {
}
func playerBufferTimeDidChange(_ bufferTime: Double) {
}
func player(_ player: Player, didFailWithError error: Error?) {
// print("\(#function) error.description")
}
}
// MARK: - PlayerPlaybackDelegate
extension HomeCell: PlayerPlaybackDelegate {
func playerCurrentTimeDidChange(_ player: Player) {
}
func playerPlaybackWillStartFromBeginning(_ player: Player) {
}
func playerPlaybackDidEnd(_ player: Player) {
}
func playerPlaybackWillLoop(_ player: Player) {
}
func playerPlaybackDidLoop(_ player: Player) {
}
}
MainViewController
import UIKit
import Alamofire
class HomeCollectionVC: UIViewController,UICollectionViewDelegateFlowLayout {
var talents = [Talent]()
@IBOutlet weak var mainView: UIView!
@IBOutlet var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
collectionView.delegate = self
collectionView.dataSource = self
print("Collection View”)
//MARK:- I use a Service here to get my Array
TalentService.getCategoryTalents(category:"foryou") { (success, response, error) in if success {
print(" getForyouTalents on ViewDidLoad")
guard let talents = response else { return }
self.collectionView.reloadData()
print("RELOAD")
self.talents = talents
}
else {
let error = error
print("caught at collection viewcontroller foryouButton \(error ?? "nil" as! Error)")
}
}
}
}// End of class
extension HomeCollectionVC: UICollectionViewDataSource {
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 4
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return talents.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCell", for: indexPath) as? HomeCell else { return UICollectionViewCell() }
cell.playerInitialization()
let videoUrl = talents[indexPath.item].videoUrl
cell.populate(videoUrl: videoUrl)
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionView.frame.width, height: collectionView.frame.height)
}
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
print("willDisplay \(indexPath.row)")
}
func collectionView(_ collectionView: UICollectionView, didEndDisplaying cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
(cell as? HomeCell)?.player.stop()
(cell as? HomeCell)?.removeVideo()
print("endDisplay \(indexPath.row)")
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
collectionView.visibleCells.forEach { cell in
(cell as? HomeCell)?.player.playFromBeginning()
print("scrollViewDidEndDecelerating")
}
}
}
Additionally- piemonte/Player this library that I am using is probably making me run into these problems. IJKPlayer will could me a lot of trouble. So if you knowany article to setup and use IJK Player with swift please do share as I tried couldn’t get through :)
