GKLocalPlayer.Local.FetchItems() appears to get stuck

Unity Services
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1

Hello,

We’re trying to properly set up Game Center authentication in our project. I’ve followed the instructions outlined here: Apple Game Center

In the first Login() function from the above link, var player = await GKLocalPlayer.Authenticate(); finishes successfully, and we can get the local player’s display name. However, immediately following that line of code, we have:

var fetchItemsResponse = await GKLocalPlayer.Local.FetchItems();
Signature = Convert.ToBase64String(fetchItemsResponse.GetSignature());
TeamPlayerID = localPlayer.TeamPlayerId;
Debug.Log($"Team Player ID: {TeamPlayerID}");

and we never receive that debug log, as it appears we are stuck waiting for FetchItems(). At this point, we receive the following warnings from Xcode:

Failed to load cached image from gamed: monogram-256@2x~iphone.gkpix

cache key: avatars__U:a589827e7e51ddeb1aa4da6c29cc87eb_18308696552540808511monogram-256@2x~iphone.gkpix

and then the following warning triggers repeatedly until we close the application:

nw_connection_copy_connected_local_endpoint_block_invoke [C3] Connection has no local endpoint

We’re having trouble understanding what the warnings mean. Is anybody able to help us out?

Thanks!

1 Like
2

I’m experiencing a crash in the same location — just doing some reading around it appears as if the Game Center implementation for Unity has several issues that people are running into relatively recently?

Sorry I couldn’t be any assistance, I’ll let you know if I get past this point.

Uploading Crash Report
MissingMethodException: Default constructor not found for type Apple.Core.Runtime.NSData
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic, System.Boolean wrapExceptions) [0x00000] in <00000000000000000000000000000000>:0
  at Apple.Core.Runtime.ReflectionUtility.CreateInstanceOrDefault (System.Type type, System.IntPtr pointer) [0x00000] in <00000000000000000000000000000000>:0
  at Apple.Core.Runtime.ReflectionUtility.CreateInstanceOrDefault[T] (System.IntPtr pointer) [0x00000] in <00000000000000000000000000000000>:0
  at Apple.GameKit.GKLocalPlayer.OnFetchItems (System.Int64 taskId, System.String publicKeyUrl, System.IntPtr signaturePtr, System.IntPtr saltPtr, System.UInt64 timestamp) [0x00000] in <00000000000000000000000000000000>:0
--- End of stack trace from previous location where exception was thrown ---

  at GameCenterManager.Login () [0x00000] in <00000000000000000000000000000000>:0
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () [0x00000] in <00000000000000000000000000000000>:0
  at System.Threading.Tasks.AwaitTaskContinuation.RunCallback (System.Threading.ContextCallback callback, System.Object state, System.Threading.Tasks.Task& currentTask) [0x00000] in <00000000000000000000000000000000>:0
  at System.Threading.Tasks.Task.FinishContinuations () [0x00000] in <00000000000000000000000000000000>:0
  at System.Threading.Tasks.Task.TrySetException (System.Object exceptionObject) [0x00000] in <00000000000000000000000000000000>:0
  at System.Threading.Tasks.TaskCompletionSource`1[TResult].TrySetException (System.Exception exception) [0x00000] in <00000000000000000000000000000000>:0
  at Apple.Core.Runtime.InteropTasks.TrySetExceptionAndRemove[TResult] (System.Int64 callbackId, System.Exception exception) [0x00000] in <00000000000000000000000000000000>:0
--- End of stack trace from previous location where exception was thrown ---
3

Hi!

Facing with the same issue in the same place.
Did you find any workaround?

4

Same issue here can’t get it to work…

5

The problem is NSData share class is not implement default constructor.
Maybe that is a bug form Apple Plugin Unity team.
We can fixed it plugin source and rebuild it.
Here is my fixed for it:

// File NSData.cs (Apple.Core_Unity/Assets/Apple.Core/Runtime)

using System;
using System.Runtime.InteropServices;

namespace Apple.Core.Runtime
{
    /// <summary>
    /// C# wrapper around NSData.
    /// </summary>
    public class NSData : NSObject
    {
        /// <summary>
        /// Construct an NSData wrapper around an existing instance.
        /// </summary>
        /// <param name="pointer"></param>
        public NSData(IntPtr pointer) : base(pointer)
        {
        }

        /// <summary>
        /// Default constructor that initializes an empty NSData instance.
        /// </summary>
        public NSData() : base(CreateEmptyNSData())
        {
        }

        /// <summary>
        /// The number of bytes contained by the data object.
        /// </summary>
        public UInt64 Length => Interop.NSData_GetLength(Pointer, NSException.ThrowOnExceptionCallback);

        /// <summary>
        /// Return the object's contents as a byte array.
        /// </summary>
        public byte[] Bytes
        {
            get
            {
                byte[] bytes = null;

                var length = (int)Length;
                var bytePtr = Interop.NSData_GetBytes(Pointer, NSException.ThrowOnExceptionCallback);
                if (length >= 0 && bytePtr != IntPtr.Zero)
                {
                    bytes = new byte[length];
                    Marshal.Copy(bytePtr, bytes, 0, length);
                }

                return bytes;
            }
        }

        /// <summary>
        /// Creates an empty NSData instance using a native method.
        /// </summary>
        /// <returns>Pointer to the newly created empty NSData object.</returns>
        private static IntPtr CreateEmptyNSData()
        {
            // Replace this with the actual method to create an empty NSData object
            return Interop.NSData_CreateEmpty(NSException.ThrowOnExceptionCallback);
        }

        private static class Interop
        {
            [DllImport(InteropUtility.DLLName)] public static extern UInt64 NSData_GetLength(IntPtr nsDataPtr, NSExceptionCallback onException);
            [DllImport(InteropUtility.DLLName)] public static extern IntPtr NSData_GetBytes(IntPtr nsDataPtr, NSExceptionCallback onException);

            [DllImport(InteropUtility.DLLName)] public static extern IntPtr NSData_CreateEmpty(NSExceptionCallback onException);
        }
    }
}

// NSData.m (Apple.Core/Native/AppleCoreNative)

//
//  NSData.m
//  AppleCoreNative
//

#import <Foundation/Foundation.h>

NSUInteger NSData_GetLength(void * nsDataPtr, void (* exceptionCallback)(void * nsExceptionPtr)) {
    @try {
        if (nsDataPtr != NULL) {
            NSData * nsData = (__bridge NSData *)nsDataPtr;
            return nsData.length;
        }
    }
    @catch (NSException * e) {
        exceptionCallback((void *)CFBridgingRetain(e));
    }
    return 0;
}

const void * NSData_GetBytes(void * nsDataPtr, void (* exceptionCallback)(void * nsExceptionPtr)) {
    @try {
        if (nsDataPtr != NULL) {
            NSData * nsData = (__bridge NSData *)nsDataPtr;
            return nsData.bytes;
        }
    }
    @catch (NSException * e) {
        exceptionCallback((void *)CFBridgingRetain(e));
    }
    return 0;
}

const void * NSData_CreateEmpty(void (*exceptionCallback)(void * nsExceptionPtr)) {
    @try {
        NSData *data = [NSData data];
        return (__bridge_retained const void *)data;
    }
    @catch (NSException * e) {
        exceptionCallback((void *)CFBridgingRetain(e));
    }
    return NULL;
}

After that we rebuild tgz from Apple plugin and use it in Unity project.

1 Like
6

My fix was to change Managed Stripping Level in the Player Settings.
By default it was set to Low.
I changed it to Minimal
image

1 Like
7

This fixes the issue. Thanks