Bug GKLocalPlayer.Local.FetchItems() Error on Unity

I setup everything correctly for adding Apple GameCenter so I can use Cloud Save. On device, I successfully login and it shows the banner.

I get this error when the next line of code is called.

Code (CSharp):

1. var fetchItemsResponse = await GKLocalPlayer.Local.FetchItems();

Code (CSharp):

1. Thread 1: EXC_BAD_ACCESS (code=257, address=0x2)

Is there a fix coming soon?

Thanks

 

I'm having the same problem as you, except no Thread 1: EXC_BAD_ACCESS (code=257, address=0x2) error, it just crashes and cuts connection from the device to XCode

 

nvm, I have the error on another device i tested

 

I have the same problem,
fetchItems()
OnSuccess()
Thread 1: EXC_BAD_ACCESS (code=257, address=0x2) error, it just crashes when cuts connection from the device to XCode
if not cut connection, it will keep stay in this error line in Xcode
using Unity 2021.3.9f, build on iOS,
manually modified manifest.json to use unity authentication 2.4.0
using Apple Game Center plugin for unity

 

For anyone looking for a solution look at the bottom of this post. Someone posted a git where they fixed it.

https://developer.apple.com/forums/thread/722593

 

He said he fixed the pointer thing in that branch but the callback still not working actually

 

Stuck in this problem for 2 weeks already, thanks for finally someone related try to handle it

 

It works for me

 

I also have the same error and so I could not use the apple plugin.

I found another path.
First I used Social.localUser.Authenticate();
Social.localUser.id - is TeamPlayerID;

then I used code from this link https://gist.github.com/BastianBlokland/bbc02a407b05beaf3f55ead3dd10f808

So I got:
publicKeyUrl, signature, salt and timestamp

And it works perfectly. Authorization on the Unity side works without any problems.

 

Is there any update on this issue?

 

People here are saying that this git branch is working properly. I still have to give it a try as soon as I can.

I confirm. It's working. It's impossible to select target platforms while building tars though.

I'm nonetheless waiting for the official release.

EDIT: I'm having troubles when I switch back to Android. Unity is building the Apple plugins for Android as well and this creates problems. It seems I cannot deselect the Android platform from the plugin inspector: even if I select only iOS and apply changes, as I try to build the .apk selection are resetting to "Any platform".

 

Tried the fix but it currently has the GetSalt and Get Signature functions disabled which i need to Authorize cloud saving.

 

Use this. GetSalt() and GetSignature() functions are not available with this mod. Use .Salt and .Signature properties instead. They work fine in my project.

An annoying problem though is that every time I switch to Android for building my game these plugins (I'm using Core and GameKit) are included in the build process which I cannot complete because of a few errors. I can't edit the selected devices in the plugin inspector. I always have to remove the packages and re-import them again.

I also cannot target iOS versions lower than 14.0. If I do, the app will crash on launch because of a GameKitWrapper-something missing. But I haven't checked yet if this is a requirement for the mod only or for the official Apple release as well.

I hope they'll fix this soon.

 

Weird, I tried using the .Salt and .Signature properties and it kept telling me there was no permision/access for it or something I forgot the specifics, even though everything was public. This caused me to switch back to whatever the latest was. I have had wayyyyy too many issues with Apple and XCode from these plugins.

I'm just going to hold out for a fix. I hope it is actually being worked on.

 

Can you upload a screenshot?

 

I might be going crazy now. I reimported the fix again reverting from the latest version. Now .GetSignature() and .Signature both don't exist. Think I will wait this out.

 

You have to switch branches to `fix-fetch-items`. https://github.com/muZZkat/unityplugins/tree/muzzkat/fix-fetch-items.
Run the python script to build the unity tar files. Then import.

Personally, I unpack the entire tar files and copy the uncompressed folder into my project entirely.

 

Yeah absolutely, that's exactly what I did, which is funny becuase importing the tar file dirrectly causes it to have no read/write permissions to imported package files which was a whole nother headache I had to figure out.

But anyways, I had the latest version, reverted to the the fix branch, which was indeed working, since the GetSignature() was removed. Discovered the .Signature reference, which in the editor kept telling me there were no permisions for that reference like it was a private varriable. So I just reverted back to the latest branch.

As per the advice of the others, AndreaMar asked me to get the screen of that error. So I went through the whole proccess again. Now I do not have GetSignature() or .Signature. So I am certainly on the Fix branch especially after re-doing the plugins like 3 times now.

So thats where I am at.

 

Hello! We were struggled with this error in the past days and we found a workaround. Open the GKIdentityVerificationResponse.cs script and change the GKIdentityVerificationResponse function from internal to public and the error will be solved!

Code (CSharp):

1. public GKIdentityVerificationResponse(ulong timestamp,
2.             IntPtr publicKeyUrl, int publicKeyUrlLength,
3.             IntPtr signature, int signatureLength,
4.             IntPtr salt, int saltLength)
5.         {
6.             Timestamp = timestamp;
7.  
8.             var publicKeyUrlBytes = new byte[publicKeyUrlLength];
9.             Marshal.Copy(publicKeyUrl, publicKeyUrlBytes, 0, publicKeyUrlLength);
10.             PublicKeyUrl = System.Text.Encoding.UTF8.GetString(publicKeyUrlBytes);
11.            
12.             Signature = new byte[signatureLength];
13.             Marshal.Copy(signature, Signature, 0, signatureLength);
14.  
15.             Salt = new byte[saltLength];
16.             Marshal.Copy(salt, Salt, 0, saltLength);
17.  
18.         }

 

Hello guys! We were having a lot of problems in the past few days with this error in FetchItems and we finally made a build with success and here go some advices:

1 - The https://github.com/muZZkat/unityplugins/tree/muzzkat/fix-fetch-items branch fixes the FetchItems Bad Access error in IOS build.
2 - Make sure you are in muZZkat's branch, you have to enter the git and checkout to fix-fetch-items branch.
3 - To make sure if you are in muZZkat's branch, the functions GetSignature() and GetSalt() must be missing. You have to change those functions with .Signature and .Salt variables.
4 - If your Unity Editor logs an error saying that the script doesn't have access/permission to the class, go to GKIdentityVerificationResponse.cs script and change the GKIdentityVerificationResponse() function from internal to public.

 

did anyone successfully use muzzkat/fix-fetch-items fix and verify on the server side something seems not vaild.
edit: found what i did wrong, it works, use Team Player ID not Game Player Id


for people @AndreaMar who have problem with android build on windows crossplatform build is fixed in this PR https://github.com/apple/unityplugins/pull/7

 

Please sir, is there any news? The fix I was using https://developer.apple.com/forums/thread/722593 doesn't work with macOS builds.

 

Hi, I created a fork on github from official Apple/unityplugins:

https://github.com/EpsilonD3lta/unityplugins

and integrated two pull requests:
1. Fix for correct multiplatform compilation from this fork: https://github.com/dodgy-ltd/apple-unityplugins/tree/cross-platform-fixes
2. Fix for FetchItems exception from this fork: https://github.com/muZZkat/unityplugins/tree/muzzkat/fix-fetch-items

Second fix causes to GetSalt and GetSignature methods change to Salt and Signature fields so you have to use those.
It seems to be working, on client and serverside too, tested on iOS devices, not tested on macOS or anything else.
I used recomended unity 2020.3.33 to build the plugins with command

python3 build.py -m iOS

. My xCode version is 14.2

 

@SebT_Unity Is there any news on the fixes? It has been over half a year. On the latest version of Unity 2023.2.0b5, both macOS and iOS cannot build while using the apple plugin.

 

It is absoluelty pathetic that such a basic function is not fixed.

 

Thanks for the info! It seems that is obsolete now... I don't see any path to using Unity's Authentication on iOS at this time...

https://docs.unity3d.com/2023.3/Documentation/Manual/net-SocialAPI.html

 

It's just awful to see. My current projects work this way. And I don't know at all what to do so that users don't lose their data. The worst part is that there is no replacement, and there doesn't seem to be one.

 

There is a serious issue here, Unity Authentication and cloud saves is unusable if this is not fixed quickly. The normal way of implementing it cannot be by merging a PR of some dude with a commit from another dude.
Even with this fixes, the plugin does not provide necessary data to sign in with Unity.

a disaster going on for more than 6 months

 

I use authorization mainly to save players data.

Unfortunately I decided to leave unity services and started working on my own, simpler solution on mysql, as I don't see any way out and can't trust solutions from Unity if such simple things can't be fixed for more than half a year. It's absolutely frustrating

 

Any Unity developer! Is there any update? How can a paid service be broken for this long?

 

Another workaround for Unity 2021+
https://github.com/apple/unityplugins/pull/20/commits/0c516cace3d87bc0e0c0c1302f13f618425e64f7

it worked for me

 

HUGE thanks! this worked for me. What a headache the Apple SDK