I'm having a crash on an app that plays videos when the users activates close captions.
I was able to replicate the issue on an empty project. The crash happens when the AVPlayerLayer is used to instantiate an AVPictureInPictureController
These are the example project where I tested the crash:
struct ContentView: View {
var body: some View {
VStack {
VideoPlaylistView()
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(Color.black.ignoresSafeArea())
}
}
class VideoPlaylistViewModel: ObservableObject {
// Test with other videos
var player: AVPlayer? = AVPlayer(url: URL(string:"https://d2ufudlfb4rsg4.cloudfront.net/newsnation/WIpkLz23h/adaptive/WIpkLz23h_master.m3u8")!)
}
struct VideoPlaylistView: View {
@StateObject var viewModel = VideoPlaylistViewModel()
var body: some View {
ScrollView {
VideoCellView(player: viewModel.player)
.onAppear {
viewModel.player?.play()
}
}
.scrollTargetBehavior(.paging)
.ignoresSafeArea()
}
}
struct VideoCellView: View {
let player: AVPlayer?
@State var isCCEnabled: Bool = false
var body: some View {
ZStack {
PlayerView(player: player)
.accessibilityIdentifier("Player View")
}
.containerRelativeFrame([.horizontal, .vertical])
.overlay(alignment: .bottom) {
Button {
player?.currentItem?.asset.loadMediaSelectionGroup(for: .legible) { group,error in
if let group {
let option = !isCCEnabled ? group.options.first : nil
player?.currentItem?.select(option, in: group)
isCCEnabled.toggle()
}
}
} label: {
Text("Close Captions")
.font(.subheadline)
.foregroundStyle(isCCEnabled ? .red : .primary)
.buttonStyle(.bordered)
.padding(8)
.background(Color.blue.opacity(0.75))
}
.padding(.bottom, 48)
.accessibilityIdentifier("Button Close Captions")
}
}
}
import Foundation
import UIKit
import SwiftUI
import AVFoundation
import AVKit
struct PlayerView: UIViewRepresentable {
let player: AVPlayer?
func updateUIView(_ uiView: UIView, context: UIViewRepresentableContext<PlayerView>) {
}
func makeUIView(context: Context) -> UIView {
let view = PlayerUIView()
view.playerLayer.player = player
view.layer.addSublayer(view.playerLayer)
view.layer.backgroundColor = UIColor.red.cgColor
view.pipController = AVPictureInPictureController(playerLayer: view.playerLayer)
view.pipController?.requiresLinearPlayback = true
view.pipController?.canStartPictureInPictureAutomaticallyFromInline = true
view.pipController?.delegate = view
return view
}
}
class PlayerUIView: UIView, AVPictureInPictureControllerDelegate {
let playerLayer = AVPlayerLayer()
var pipController: AVPictureInPictureController?
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
playerLayer.frame = bounds
playerLayer.backgroundColor = UIColor.green.cgColor
}
func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, failedToStartPictureInPictureWithError error: any Error) {
print("Error starting Picture in Picture: \(error.localizedDescription)")
}
}
class AppDelegate: NSObject, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(.playback, mode: .moviePlayback)
try audioSession.setActive(true)
} catch {
print("ERR: \(error.localizedDescription)")
}
return true
}
}
UITest to make the app crash:
final class VideoPlaylistSampleUITests: XCTestCase {
func testCrashiOS26ToggleCloseCaptions() throws {
let app = XCUIApplication()
app.launch()
let videoPlayer = app.otherElements["Player View"]
XCTAssertTrue(videoPlayer.waitForExistence(timeout: 30))
let closeCaptionButton = app.buttons["Button Close Captions"]
for _ in 0..<2000 {
closeCaptionButton.tap()
}
}
}
