ios - ¿Cómo reproducir audio en Background Swift?

avfoundation

Question

Como ven, estoy transmitiendo una transmisión de audio. Pero cuando presiono el botón de inicio y salgo de la aplicación, la transmisión se detiene o no puedo escuchar. ¿Cómo puedo continuar transmitiendo en segundo plano y escucharlo desde la pantalla de bloqueo?

ViewController.Swift

import UIKit
import AVFoundation
import MediaPlayer
import GoogleMobileAds
class ViewController: UIViewController, GADInterstitialDelegate {
@IBOutlet weak var exitMapButton: UIButton!
@IBOutlet weak var radarMap: UIWebView!
var interstitial: GADInterstitial!
func createAndLoadInterstitial() -> GADInterstitial {
var interstitial = GADInterstitial(adUnitID: "ca-app-pub-5378899862041789/2782958552")
interstitial.delegate = self
interstitial.loadRequest(GADRequest())
return interstitial
}
func getAd(){
if (self.interstitial.isReady)
{
self.interstitial.presentFromRootViewController(self)
self.interstitial = self.createAndLoadInterstitial()
}
}
@IBOutlet weak var ataturkButton: UIButton!
@IBOutlet weak var sabihaButton: UIButton!
@IBOutlet weak var esenbogaButton: UIButton!
@IBOutlet weak var weatherButton: UIButton!
@IBOutlet weak var statusLabel: UILabel!
@IBOutlet weak var playButton: UIButton!
@IBOutlet weak var webViewButton: UIButton!
var googleBannerView: GADBannerView!
override func viewDidLoad() {
super.viewDidLoad()
}
class PlayerAv {
var audioLink: String?
var player: AVPlayer
init(link: String) {
self.audioLink = link
self.player = AVPlayer(URL: NSURL(string: link))
}
}
var myPlayer = PlayerAv(link: "http://www.liveatc.net/play/ltba.pls")
var setTowerState = ""
@IBAction func sliderValueChanged(sender: UISlider) {
var currentValue = Float(sender.value)
println(currentValue)
myPlayer.player.volume = currentValue
}
@IBAction func getWeatherWindow(sender: AnyObject) {
UIApplication.sharedApplication().openURL(NSURL(string: "http://www.aviationweather.gov/adds/metars/?station_ids=ltac&std_trans=standard&chk_metars=on&hoursStr=most+recent+only&chk_tafs=on&submitmet=Submit")!)
println("Directed to weather page")
}
@IBAction func changeToAtaturk() {
myPlayer.player.pause()
myPlayer = PlayerAv(link: "http://www.liveatc.net/play/ltba.pls")
myPlayer.audioLink == ""
println("/(myPlayer.audioLink!)--a")
playButton.setTitle("Pause", forState: UIControlState.Normal)
myPlayer.player.play()
setTowerState = "ataturk"
statusLabel.text = "Status: Playing, LTBA"
}
@IBAction func changeToEsenboga() {
myPlayer.player.pause()
myPlayer = PlayerAv(link: "http://www.liveatc.net/play/ltac.pls")
println("/(myPlayer.audioLink!)--a")
playButton.setTitle("Pause", forState: UIControlState.Normal)
myPlayer.player.play()
setTowerState = "esenboga"
statusLabel.text = "Status: Playing, LTAC"
}
@IBAction func changeToSabiha() {
myPlayer.player.pause()
myPlayer = PlayerAv(link: "http://www.liveatc.net/play/ltfj.pls")
println("/(myPlayer.audioLink!)--a")
playButton.setTitle("Pause", forState: UIControlState.Normal)
myPlayer.player.play()
setTowerState = "sabiha"
statusLabel.text = "Status: Playing, LTFJ"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func playButtonPressed(sender: AnyObject) {
toggle()
}
func toggle() {
if playButton.titleLabel?.text == "Play" {
playRadio()
println("Playing")
statusLabel.text = "Status: Playing"
} else {
pauseRadio()
println("Paused")
statusLabel.text = "Status: Paused"
}
}
func playRadio() {
myPlayer.player.play()
playButton.setTitle("Pause", forState: UIControlState.Normal)
}
func pauseRadio() {
myPlayer.player.pause()
playButton.setTitle("Play", forState: UIControlState.Normal)
}
}

Answer 1

Debe configurar los modos de fondo de capacidades de la aplicación (Audio y AirPlay) y establecer su categoría AVAudioSession en AVAudioSessionCategoryPlayback y configurarla activa

Desde Xcode 8.2.1 • Swift 3.0.2 en adelante

do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: .mixWithOthers)
print("Playback OK")
try AVAudioSession.sharedInstance().setActive(true)
print("Session is Active")
} catch {
print(error)
}

Xcode 10 • Swift 4.2

do {
try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [.mixWithOthers, .allowAirPlay])
print("Playback OK")
try AVAudioSession.sharedInstance().setActive(true)
print("Session is Active")
} catch {
print(error)
}

Answer 2

Solo pegue en la vista

 let path = Bundle.main.path(forResource:"Bismallah", ofType: "mp3")
do{
try playerr = AVAudioPlayer(contentsOf: URL(fileURLWithPath: path!))
} catch {
print("File is not Loaded")
}
let session = AVAudioSession.sharedInstance()
do{
try session.setCategory(AVAudioSessionCategoryPlayback)
}
catch{
}
player.play()

Answer 3

Xcode 10.2.1 Swift 4

Agregue el siguiente código en su AppDelegate

func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, mode: AVAudioSessionModeDefault, options: [.mixWithOthers, .allowAirPlay])
print("Playback OK")
try AVAudioSession.sharedInstance().setActive(true)
print("Session is Active")
} catch {
print(error)
}
return true
}

Nota: - Configure las opciones según sea necesario. Por ejemplo, para detener un audio de fondo mientras se reproduce un archivo de video, agregue

 options: [.allowAirPlay, .defaultToSpeaker]

Y no olvide habilitar el audio y la reproducción en modo de fondo