Recognizing a dynamic link when application boots (Unity + iOS)

[Naren Keshav]

Target Platform: iOS

Development Tool: Unity3D

Firebase Version: 6.11.0

Scenario

The application is "not running". User presses a dynamic link causing the application to boot.

Intention

When the application boots, how to recognize the dynamic link that the user pressed?

Tryouts

I have an empty scene with default gameobjects & a text mesh pro component. Now I have one script called as DynamicLinkTest.cs on one of the gameobjects

using System;
using TMPro;
using Firebase.DynamicLinks;
using UnityEngine;

namespace Firebase.QA.Tests
{
    internal sealed class DynamicLinkTest : MonoBehaviour
    {
        [SerializeField] internal TextMeshProUGUI MyTextField;
        private void OnEnable()
        {
            DynamicLinks.DynamicLinkReceived += onDynamicLinkReceived;
            MyTextField.SetText("initiated");
        }
        private void onDynamicLinkReceived(object _sender, EventArgs _args)
        {
            ReceivedDynamicLinkEventArgs dynamicLinkEventArgs = _args as ReceivedDynamicLinkEventArgs;
            Debug.LogFormat("Received dynamic link {0}",
                            dynamicLinkEventArgs.ReceivedDynamicLink.Url.OriginalString);
            MyTextField.SetText(dynamicLinkEventArgs.ReceivedDynamicLink.Url.OriginalString);
        }
        private void OnDisable()
        {
            DynamicLinks.DynamicLinkReceived -= onDynamicLinkReceived;
        }
    }
}

 With the above script,

onDynamicLinkReceived()

gets called when the application is in the background (suspended state) but unable to recognize if the application state is "not running".

I hope - I've provided enough information to state my issue. I would love to provide more information for better clarity.

Thank you,

Naren

[martin...@google.com]

Hi Naren!

You are registering for dynamic links correctly as far as I can tell (there are Unity docs here, and a sample project on GitHub).

I'd love to know whether you believe that you've found a bug in dynamic links (ie: it's not behaving as you expected) or if you're just asking for general device on a specific user journey.

To answer your question directly, in scripts where I care about whether or not I'm in the background I typically use the OnApplicationPause callback. So you could have something like:
```

using System;
using TMPro;
using Firebase.DynamicLinks;
using UnityEngine;

namespace Firebase.QA.Tests
{
    internal sealed class DynamicLinkTest : MonoBehaviour
    {
        [SerializeField] internal TextMeshProUGUI MyTextField;
        private void OnEnable()
        {
            DynamicLinks.DynamicLinkReceived += onDynamicLinkReceived;
            MyTextField.SetText("initiated");
        }
        private void onDynamicLinkReceived(object _sender, EventArgs _args)
        {
            ReceivedDynamicLinkEventArgs dynamicLinkEventArgs = _args as ReceivedDynamicLinkEventArgs;
            Debug.LogFormat("Received dynamic link {0}",
                            dynamicLinkEventArgs.ReceivedDynamicLink.Url.OriginalString);
            MyTextField.SetText(dynamicLinkEventArgs.ReceivedDynamicLink.Url.OriginalString);
        }
        private void OnDisable()
        {
            DynamicLinks.DynamicLinkReceived -= onDynamicLinkReceived;
        }

        private void OnApplicationPause(bool paused)

        {

            if (paused)

            {

                // do something here. Set a variable, unregister the callback, &c

            }

            else

            {

                // do something here. Set a variable, register the callback, &c

            }

        }
    }
}
```

If that doesn't help, I just need a little more information about what's happening and what you want to achieve. I can certainly dive into more details (ex: is the callback being triggered in some sort of bad state causing a Unity-level exception of some kind?).

Thanks!

--Patrick