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Votes

0

Found in

2018.4.0f1

2018.4.4f1

2019.1.0a1

2019.2.0a1

2019.3.0a1

Issue ID

1172298

Regression

No

[iOS] OnApplicationPause() is not called if "Behaviour in Background" is set to "Custom"

iOS

-

How to reproduce:
1. Open the "PauseRepro.zip" project
2. Switch platform to iOS
3. In the Player settings, set "Behaviour in Background" to "Custom"
4. Build & Launch the app on device
5. Swap the app to background

Actual result: OnApplicationPause() callback doesn't get called and "Pause called" isn't logged into the console.
Expected result: OnApplicationPause() callback gets called and "Pause called" is logged into the console.

Reproducible with: 2019.3.0a11, 2019.2.1f1, 2019.1.14f1, 2018.4.6f1, 2017.4.30f1.

Tested with:
-iPhone 7 (iOS 10.2)

Notes:
- When Behaviour in Background is set to "Custom" the player gets paused when in background.
- Right now this behaviour is set by design, but the callback should get called since the application gets paused.

  1. Response avatar

    Resolution Note:

    Setting "Behaviour in Background" to "Custom" prevents Unity from pausing so that the Unity loop could be executed native plugins by calling `UnityBatchPlayerLoop` (see https://bitbucket.org/Unity-Technologies/iosnativecodesamples/src/ae6a0a2c02363d35f954d244a6eec91c0e0bf194/NativeIntegration/BackgroundTasks/BackgroundFetch/?at=5.0-dev).

    If you don't need to run anything directly in Unity while the app is in background you can add the info.plist key you need from an editor post-processor scripts, in that case you should still pause normally. Something like this should work:

    [PostProcessBuild]
    public static void OnPostprocessBuild (BuildTarget buildTarget, string path)
    {
    #if PLATFORM_IOS
    if (buildTarget == BuildTarget.iOS) {

    var plistPath = path + "/Info.plist";
    var plist = new PlistDocument();
    plist.ReadFromString(File.ReadAllText(plistPath));

    // Get root
    var rootDict = plist.root;
    PlistElementArray currentBacgkgroundModes = (PlistElementArray) rootDict["UIBackgroundModes"];

    if (currentBacgkgroundModes == null)
    currentBacgkgroundModes = rootDict.CreateArray("UIBackgroundModes");
    }

    currentBacgkgroundModes.AddString("fetch");

    // Write to file
    File.WriteAllText(plistPath, plist.WriteToString());
    }
    }

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