How to use/bind the ExternalAccessroy for ios in .net MAUI targeting 9.0

Question

Hello team,

When I am trying to create an ipa file in release mode in IOS from Visual Studio 2022 I am getting the below errors when I am keeping <MtouchLink>SdkOnly</MtouchLink>
I am not finding any articles/documentation on how to use it. Can you please guide me on how to use and solve the below errors?

<PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net9.0-ios|AnyCPU'">

	<CreatePackage>false</CreatePackage>

	<RuntimeIdentifier>ios-arm64</RuntimeIdentifier>

	<CodesignProvision>Release_Provisioning_Profile</CodesignProvision>

	<CodesignKey>iPhone Distribution</CodesignKey>

	<CodesignEntitlements>Platforms\iOS\Entitlements.plist</CodesignEntitlements>

	<MtouchLink>SdkOnly</MtouchLink>

	<UseInterpreter>true</UseInterpreter>

	<MtouchUseLlvm>true</MtouchUseLlvm>

	<ProvisioningType>manual</ProvisioningType>

</PropertyGroup>
```**Errors**

clang++ exited with code 1:

Undefined symbols for architecture arm64:

  "_EAAccessoryDidConnectNotification", referenced from:

```r
  -[mot_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[mot_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[dcsbt_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)

  -[dcsbt_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)
```  "_EAAccessoryDidDisconnectNotification", referenced from:

```r
  -[mot_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[mot_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[dcsbt_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)

  -[dcsbt_MFiConnectivityMgr setEnabled:] in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)
```  "_EAAccessoryKey", referenced from:

```r
  -[mot_IOMFiDevice disconnect] in libintegratedsdk.a[arm64][20](IOMFiDevice.o)

  -[mot_IOMFiDevice stream:handleEvent:] in libintegratedsdk.a[arm64][20](IOMFiDevice.o)

  -[mot_MFiConnectivityMgr accessoryHasConnected:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  ___58-[mot_MFiConnectivityMgr accessoryHasConnectedWorkaround:]_block_invoke in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[mot_MFiConnectivityMgr accessoryHasDisconnected:] in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)

  -[dcsbt_MFiConnectivityMgr accessoryHasConnected:] in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)

  ___60-[dcsbt_MFiConnectivityMgr accessoryHasConnectedWorkaround:]_block_invoke in libintegratedsdk.a[arm64][105](DcsMFiConnectivityMgr.o)

  ...
```  "_OBJC_CLASS_$_EAAccessoryManager", referenced from:

```sql
   in libintegratedsdk.a[arm64][21](MFiConnectivityMgr.o)
```  "_OBJC_CLASS_$_EASession", referenced from:

```sql
   in libintegratedsdk.a[arm64][20](IOMFiDevice.o)
```ld: symbol(s) not found for architecture arm64

Update

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I am using ZebraRFID SDK for ios 'ZebraRfidIntegratedSdk.dll' and Xcode version 16.2 No, I am not getting errors when I am using Don't Link or Link All then it builds success.

Answer 1

Hello,

Thanks for clarifying that the problem comes from the SDK itself.

Error indicates that the method is referenced that does not have an implementation in the arm64 binary (.a file) .

Since this is a third-party tool and not supported on Q&A, you could contact them for further help.

Best Regards,

Wenyan Zhang

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