391 lines
13 KiB
Swift
391 lines
13 KiB
Swift
//
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// BRPlayerListViewController.swift
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// BeeReel
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//
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// Created by 长沙鸿瑶 on 2025/6/24.
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//
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import UIKit
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import SJMediaCacheServer
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@objc protocol BRPlayerListViewControllerDelegate {
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///将要加载更多数据
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@objc optional func br_playerViewControllerShouldLoadMoreData(playerViewController: BRPlayerListViewController) -> Bool
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///加载更多数据
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@objc optional func br_playerViewControllerLoadMoreData(playerViewController: BRPlayerListViewController)
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///当前展示的发生变化
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@objc optional func br_playerListViewController(_ viewController: BRPlayerListViewController, didChangeIndexPathForVisible indexPath: IndexPath)
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///即将自动滑至下一级
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@objc optional func br_shouldAutoScrollNextEpisode(_ viewController: BRPlayerListViewController) -> Bool
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}
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@objc protocol BRPlayerListViewControllerDataSource {
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func br_playerListViewController(_ viewController: BRPlayerListViewController, _ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
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func br_playerListViewController(_ viewController: BRPlayerListViewController, _ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
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@objc optional func br_numberOfSections(in viewController: BRPlayerListViewController) -> Int
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}
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class BRPlayerListViewController: BRViewController {
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var contentSize: CGSize {
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return CGSize(width: UIScreen.width, height: UIScreen.height - UIScreen.customTabBarHeight)
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}
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var CellClass: BRPlayerListCell.Type {
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return BRPlayerListCell.self
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}
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private(set) lazy var viewModel: BRPlayerViewModel = {
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let vm = BRPlayerViewModel()
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vm.delegate = self
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return vm
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}()
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weak var delegate: BRPlayerListViewControllerDelegate?
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weak var dataSource: BRPlayerListViewControllerDataSource?
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///预加载
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private var prePrefetchTask: MCSPrefetchTask?
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private var nextPrefetchTask: MCSPrefetchTask?
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private lazy var collectionViewLayout: UICollectionViewLayout = {
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let layout = UICollectionViewFlowLayout()
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layout.itemSize = contentSize
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layout.minimumInteritemSpacing = 0
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layout.minimumLineSpacing = 0
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return layout
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}()
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private(set) lazy var collectionView: BRCollectionView = {
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let collectionView = BRCollectionView(frame: .zero, collectionViewLayout: collectionViewLayout)
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collectionView.delegate = self
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collectionView.dataSource = self
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collectionView.isPagingEnabled = true
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collectionView.showsVerticalScrollIndicator = false
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collectionView.showsHorizontalScrollIndicator = false
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collectionView.bounces = false
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collectionView.scrollsToTop = false
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collectionView.register(CellClass.self, forCellWithReuseIdentifier: "cell")
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return collectionView
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}()
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deinit {
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self.prePrefetchTask?.cancel()
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self.nextPrefetchTask?.cancel()
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self.collectionView.removeFromSuperview()
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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self.statusBarStyle = .lightContent
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self.view.backgroundColor = .color1C1C1C()
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NotificationCenter.default.addObserver(self, selector: #selector(didBecomeActiveNotification), name: UIApplication.didBecomeActiveNotification, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(willResignActiveNotification), name: UIApplication.willResignActiveNotification, object: nil)
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br_setupUI()
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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if self.viewModel.isPlaying {
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self.viewModel.currentPlayer?.start()
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}
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}
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override func viewDidDisappear(_ animated: Bool) {
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super.viewDidDisappear(animated)
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self.viewModel.currentPlayer?.pause()
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DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) { [weak self] in
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guard let self = self else { return }
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self.scrollDidEnd(self.collectionView)
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}
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}
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///返回上个视频路径 需要子类重写
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var previousVideoUrl: String? { return nil }
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///返回下个视频路径
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var nextVideoUrl: String? { return nil }
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func play() {
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if self.isDidAppear {
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self.viewModel.currentPlayer?.start()
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}
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self.viewModel.isPlaying = true
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if (self.collectionView.contentSize.height - self.collectionView.contentOffset.y) / self.contentSize.height <= 3 {
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self.loadMoreData()
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}
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}
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func pause() {
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self.viewModel.currentPlayer?.pause()
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self.viewModel.isPlaying = false
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}
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func reloadData(completion: (() -> Void)? = nil) {
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UIView.performWithoutAnimation {
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self.collectionView.reloadData()
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}
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self.collectionView.performBatchUpdates(nil) { [weak self] finish in
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guard let self = self else { return }
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let cell = self.collectionView.cellForItem(at: viewModel.currentIndexPath) as? BRPlayerProtocol
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self.viewModel.currentPlayer = cell
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completion?()
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}
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}
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func scrollToItem(indexPath: IndexPath, animated: Bool = true, completer: (() -> Void)? = nil) {
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UIView.performWithoutAnimation {
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self.collectionView.scrollToItem(at: indexPath, at: .top, animated: animated);
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}
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self.collectionView.performBatchUpdates(nil) { [weak self] _ in
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guard let self = self else { return }
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if !animated {
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if viewModel.currentIndexPath != indexPath {
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self.skip(indexPath: indexPath)
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} else {
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self.play()
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}
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}
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completer?()
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}
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}
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func clearData() {
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self.viewModel.currentPlayer = nil
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self.viewModel.currentIndexPath = .init(row: 0, section: 0)
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self.collectionView.contentOffset = .init(x: 0, y: 0)
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self.collectionView.reloadData()
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}
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}
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extension BRPlayerListViewController {
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private func br_setupUI() {
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view.addSubview(collectionView)
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collectionView.snp.makeConstraints { make in
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make.top.equalToSuperview()
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make.left.equalToSuperview()
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make.width.equalTo(self.contentSize.width)
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make.height.equalTo(self.contentSize.height)
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}
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}
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}
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//MARK: -------------- UICollectionViewDelegate UICollectionViewDataSource --------------
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extension BRPlayerListViewController: UICollectionViewDelegate, UICollectionViewDataSource {
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func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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var cell: UICollectionViewCell
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if let newCell = self.dataSource?.br_playerListViewController(self, collectionView, cellForItemAt: indexPath) {
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cell = newCell
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} else {
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cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
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}
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if let cell = cell as? BRPlayerListCell {
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if cell.viewModel == nil {
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cell.viewModel = viewModel
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}
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}
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if self.viewModel.currentPlayer == nil, indexPath == viewModel.currentIndexPath, let playerProtocol = cell as? BRPlayerProtocol {
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viewModel.currentIndexPath = indexPath
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self.viewModel.currentPlayer = playerProtocol
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didChangeIndexPathForVisible()
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}
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return cell
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}
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func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
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self.prePrefetchTask?.cancel()
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self.nextPrefetchTask?.cancel()
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self.prePrefetchTask = self.prefetchTask(url: self.previousVideoUrl)
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self.nextPrefetchTask = self.prefetchTask(url: self.nextVideoUrl)
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}
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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if let count = self.dataSource?.br_playerListViewController(self, collectionView, numberOfItemsInSection: section) {
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return count
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} else {
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return 0
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}
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}
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func numberOfSections(in collectionView: UICollectionView) -> Int {
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if let num = self.dataSource?.br_numberOfSections?(in: self) {
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return num
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} else {
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return 1
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}
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}
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//滑动停止
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func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
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scrollDidEnd(scrollView)
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brLog(message: "scrollViewDidEndDecelerating+++++++++++++++")
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}
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func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
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scrollDidEnd(scrollView)
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brLog(message: "scrollViewDidEndScrollingAnimation+++++++++++++++")
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}
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func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
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// if !decelerate {
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// scrollDidEnd(scrollView)
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// }
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brLog(message: "scrollViewDidEndDragging+++++++++++++++\(decelerate)")
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}
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private func scrollDidEnd(_ scrollView: UIScrollView) {
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let offsetY = scrollView.contentOffset.y
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let indexPaths = self.collectionView.indexPathsForVisibleItems
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for indexPath in indexPaths {
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guard let cell = self.collectionView.cellForItem(at: indexPath) else { continue }
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if floor(offsetY) == floor(cell.frame.origin.y) {
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if viewModel.currentIndexPath != indexPath {
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self.skip(indexPath: indexPath)
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}
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}
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}
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}
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private func skip(indexPath: IndexPath) {
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guard let currentPlayer = self.collectionView.cellForItem(at: indexPath) as? BRPlayerProtocol else { return }
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viewModel.currentIndexPath = indexPath
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self.viewModel.currentPlayer = currentPlayer
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didChangeIndexPathForVisible()
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self.play()
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}
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}
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//MARK: -------------- BRPlayerViewModelDelegate --------------
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extension BRPlayerListViewController: BRPlayerViewModelDelegate {
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func br_currentVideoPlayFinish(viewModel: BRPlayerViewModel) {
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var isScroll = true
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if let result = self.delegate?.br_shouldAutoScrollNextEpisode?(self) {
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isScroll = result
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}
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if isScroll {
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scrollToNextEpisode()
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} else {
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viewModel.currentPlayer?.replay()
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}
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}
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func br_switchPlayAndPause(viewModel: BRPlayerViewModel) {
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if self.viewModel.isPlaying {
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self.pause()
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} else {
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self.play()
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}
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}
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func br_onEpisodeView(viewModel: BRPlayerViewModel) {
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}
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func br_clickRateButton(viewModel: BRPlayerViewModel) {
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}
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}
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extension BRPlayerListViewController {
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///滑动至下一级
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private func scrollToNextEpisode() {
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var contentOffset = self.collectionView.contentOffset
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if hasNextEpisode() {
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contentOffset.y = floor(contentOffset.y + self.contentSize.height)
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self.collectionView.setContentOffset(contentOffset, animated: true)
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} else {
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self.viewModel.currentPlayer?.replay()
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}
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}
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///是否还有下一级
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private func hasNextEpisode() -> Bool {
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let contentOffset = self.collectionView.contentOffset
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let contentSize = self.collectionView.contentSize
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if contentOffset.y >= contentSize.height - self.contentSize.height {
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return false
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}
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return true
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}
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}
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extension BRPlayerListViewController {
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private func loadMoreData() {
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let isLoad = self.delegate?.br_playerViewControllerShouldLoadMoreData?(playerViewController: self)
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if isLoad != false {
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self.delegate?.br_playerViewControllerLoadMoreData?(playerViewController: self)
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}
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}
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private func didChangeIndexPathForVisible() {
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self.delegate?.br_playerListViewController?(self, didChangeIndexPathForVisible: viewModel.currentIndexPath)
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}
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}
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//MARK: -------------- 预加载 --------------
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extension BRPlayerListViewController {
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private func prefetchTask(url: String?) -> MCSPrefetchTask? {
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return BRPlayerCache.prefetch(urlString: url)
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}
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}
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//MARK: -------------- 系统回调 --------------
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extension BRPlayerListViewController {
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@objc func didBecomeActiveNotification() {
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if self.viewModel.isPlaying && isDidAppear {
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self.viewModel.currentPlayer?.start()
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}
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}
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@objc func willResignActiveNotification() {
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self.viewModel.currentPlayer?.pause()
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}
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}
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