ArKit plugin - Loading ARReferenceObject from file on runtime.

I am currently working on having a database of scanned objects. I have been using the arkit plugin to scan and save the objects on my Application.persistentDataPath + "/ARReferenceObjects/" folder.

So far so good, but lets say I would like to come back and in another session and load to a List<ARReferenceObject> scannedObjects; all my previous saved objects.

I have been doing the following:

Code (CSharp):

1. public void LoadObjects()
2.     {
3.         DirectoryInfo dir = new DirectoryInfo(filePath);
4.         FileInfo[] info = dir.GetFiles("*.arobject");
5.  
6.         foreach (FileInfo f in info)
7.         {
8.             Debug.Log(f.ToString());
9.             LoadARReferenceObject(f.ToString());
10.         }
11.     }
12.  
13.    
14.     private void LoadARReferenceObject(string path)
15.     {
16.         Debug.Log("Trying to load a ARReferenceObject from path " + path);
17.  
18.         ARReferenceObject aRReferenceObject = ARReferenceObject.Load(path);
19.  
20.         if (aRReferenceObject != null)
21.         {
22.             Debug.Log("Not null");
23.             scannedObjects.Add(aRReferenceObject);
24.         }
25.         else
26.         {
27.             Debug.Log("<color=red>Fail</color>");
28.         }
29.     }
30.  

So I am basically retrieving all the saved ".arobject" from the folder but RReferenceObject.Load(path); keeps failing and getting a Error Domain=com.apple.arkit.error Code=500 "File IO failed." with a NSLocalizedFailureReason=Unrecognized archive format.

More in detail showing this on xcode :

2019-03-11 12:41:05.028871+0000 ObjectScanner[1182:187799] [General] Unable to read archive at path: /var/mobile/Containers/Data/Application/70318DDB-BE5C-45DF-AFA0-6381166000B3/Documents/ARReferenceObjects/-L_bRPAu7_egITfMA7fR.arobject.

2019-03-11 12:41:05.028964+0000 ObjectScanner[1182:187799] Error Domain=com.apple.arkit.error Code=500 "File IO failed." UserInfo={NSURL=file:///var/mobile/Containers/Data/Application/70318DDB-BE5C-45DF-AFA0-6381166000B3/Documents/ARReferenceObjects/-L_bRPAu7_egITfMA7fR.arobject, NSLocalizedDescription=File IO failed., NSLocalizedFailureReason=Unrecognized archive format}

I am not sure what I am doing wrong, fro originally saving I was using the code provided on the arkit plugin:

Code (CSharp):

1. public void SaveScannedObjects()
2.     {
3.         if (scannedObjects.Count == 0)
4.             return;
5.  
6.         string pathToSaveTo = Path.Combine(Application.persistentDataPath, "ARReferenceObjects");
7.  
8.         if (!Directory.Exists (pathToSaveTo))
9.         {
10.             Directory.CreateDirectory (pathToSaveTo);
11.         }
12.  
13.         foreach (ARReferenceObject arro in scannedObjects)
14.         {
15.             string fullPath = Path.Combine (pathToSaveTo, arro.name + ".arobject");
16.             arro.Save (fullPath);
17.         }
18.     }

Where the save and Load Functions are these.

Code (CSharp):

1.         public bool Save(string path)
2.         {
3.             return referenceObject_ExportObjectToURL(m_Ptr, path);
4.         }
5.  
6.         public static ARReferenceObject Load(string path)
7.         {
8.             var ptr = referenceObject_InitWithArchiveUrl(path);
9.             if (ptr == IntPtr.Zero)
10.                 return null;
11.  
12.             return new ARReferenceObject(ptr);
13.         }

I would be very grateful if someone could guide me in the right direction.

Thank you very much!

 

Did you ever solve this problem? I'm having the same issue.