128 lines
4.6 KiB
Swift
128 lines
4.6 KiB
Swift
//
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// CloudDrivePreviewViewController.swift
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// suixinkan
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//
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import AVKit
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import Kingfisher
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import SnapKit
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import UIKit
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/// 云盘文件预览页，严格对齐 Android 黑底预览并保留 iOS 原生视频控制层。
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final class CloudDrivePreviewViewController: BaseViewController {
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private let file: CloudFile
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private let imageView = UIImageView()
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private var playerViewController: AVPlayerViewController?
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private var previousStandardAppearance: UINavigationBarAppearance?
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private var previousScrollEdgeAppearance: UINavigationBarAppearance?
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private var previousCompactAppearance: UINavigationBarAppearance?
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private var previousTintColor: UIColor?
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/// 初始化云盘文件预览页。
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init(file: CloudFile) {
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self.file = file
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super.init(nibName: nil, bundle: nil)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override var preferredStatusBarStyle: UIStatusBarStyle {
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.lightContent
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}
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override func setupNavigationBar() {
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navigationItem.titleView = UIView()
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navigationItem.hidesBackButton = true
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let backButton = UIButton(type: .system)
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backButton.setImage(
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UIImage(systemName: "chevron.left")?.withConfiguration(UIImage.SymbolConfiguration(pointSize: 20, weight: .medium)),
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for: .normal
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)
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backButton.tintColor = .white
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backButton.accessibilityLabel = "返回"
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backButton.addTarget(self, action: #selector(backTapped), for: .touchUpInside)
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backButton.snp.makeConstraints { make in make.width.height.equalTo(44) }
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navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backButton)
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}
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override func setupUI() {
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view.backgroundColor = .black
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if file.isVideo {
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setupVideo()
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} else {
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setupImage()
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}
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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applyTransparentNavigationBar()
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setNeedsStatusBarAppearanceUpdate()
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}
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override func viewWillDisappear(_ animated: Bool) {
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super.viewWillDisappear(animated)
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restoreNavigationBar()
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playerViewController?.player?.pause()
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}
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private func setupImage() {
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imageView.contentMode = .scaleAspectFit
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imageView.backgroundColor = .black
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imageView.accessibilityLabel = file.name
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view.addSubview(imageView)
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imageView.snp.makeConstraints { make in make.edges.equalTo(view.safeAreaLayoutGuide) }
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if let url = URL(string: file.fileUrl), !file.fileUrl.isEmpty {
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imageView.kf.setImage(with: url)
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}
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}
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private func setupVideo() {
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guard let url = URL(string: file.fileUrl), !file.fileUrl.isEmpty else { return }
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let player = AVPlayer(url: url)
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let controller = AVPlayerViewController()
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controller.player = player
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controller.view.backgroundColor = .black
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addChild(controller)
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view.addSubview(controller.view)
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controller.view.snp.makeConstraints { make in make.edges.equalTo(view.safeAreaLayoutGuide) }
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controller.didMove(toParent: self)
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playerViewController = controller
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player.play()
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}
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private func applyTransparentNavigationBar() {
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guard let navigationBar = navigationController?.navigationBar else { return }
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previousStandardAppearance = navigationBar.standardAppearance
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previousScrollEdgeAppearance = navigationBar.scrollEdgeAppearance
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previousCompactAppearance = navigationBar.compactAppearance
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previousTintColor = navigationBar.tintColor
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let appearance = UINavigationBarAppearance()
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appearance.configureWithTransparentBackground()
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appearance.backgroundColor = .clear
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appearance.shadowColor = .clear
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navigationBar.standardAppearance = appearance
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navigationBar.scrollEdgeAppearance = appearance
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navigationBar.compactAppearance = appearance
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navigationBar.tintColor = .white
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}
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private func restoreNavigationBar() {
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guard let navigationBar = navigationController?.navigationBar else { return }
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if let previousStandardAppearance {
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navigationBar.standardAppearance = previousStandardAppearance
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}
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navigationBar.scrollEdgeAppearance = previousScrollEdgeAppearance
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navigationBar.compactAppearance = previousCompactAppearance
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navigationBar.tintColor = previousTintColor
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}
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@objc private func backTapped() {
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navigationController?.popViewController(animated: true)
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}
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}
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