Configuration

package.json

    "react": "16.3.1",
    "react-native": "0.55.4",
    "react-native-track-player": "^1.1.3",
    "react-native-swift": "^1.2.2",

react-native info

Environment:
  OS: macOS High Sierra 10.13.6
  Node: 8.11.2
  Yarn: 1.9.4
  npm: 5.6.0
  Watchman: 4.9.0
  Xcode: Xcode 10.1 Build version 10B61
  Android Studio: 3.2 AI-181.5540.7.32.5056338

Packages: (wanted => installed)
  react: 16.3.1 => 16.3.1
  react-native: 0.55.4 => 0.55.4

Problem

If you are listening to music from anything else on your phone and you start the application. Even if the player is not created yet by calling TrackPlayer.setupPlayer() the music gets stopped as soon as the app starts. This problem only happened to me on iOS. And after the app is launched we can go back to music play and go back to the app the music won’t stop (except when calling the play on the player but that’s normal behaviour) 😉

Did I miss a step of the configuration or is that a bug ?

I think it is related but when I was launching the app from XCode I saw this logs coming in loop :

xxx[553:35364] [avas] AVAudioSessionPortImpl.mm:56:ValidateRequiredFields: Unknown selected data source for Port 擴音 (type: Speaker)