Xamarin.forms.googlemaps: Error building IOS app using v. 3.3.0

[mikthemonster]

VERSIONS

• Xamarin.Forms.GoogleMaps - 3.3.0
• Xamarin.Forms -4.3.0.908675
*

PLATFORMS

• [ ] Android
• [x] iOS
• [ ] UWP

ACTUAL BEHAVIOR

After updating Xamarin.Forms.GoogleMaps from version 3.2.1 to 3.3.0 our build server (Visual Studio App Center) fails to build for IOS. We get the following error:

MTOUCH : error MT2101: Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void Google.Maps.Polyline::set_Spans(Google.Maps.StyleSpan[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'. [/Users/runner/runners/2.159.2/work/1/s/iOS/WorkingWithMaps.iOS.csproj]

If I re-install v 3.2.1 the build is working, but as soon as I update to 3.3.0 the build fails.

[tonyfonager]

I have exactly the same issue after upgrading to 3.3.0

[Pietervdw]

Same problem here

[amay077]

I'm not sure to is AppCenter supports latest iOS SDK and GoogleMaps SDK for iOS.

[mikthemonster]

I just got this reply from AppCenter:

It seems that latest version of map was not supported by AppCenter that's why it was failed, I am forwarding this to our team and will update you when i will get any response from them.

[simonemarra]

Actually I'm not using AppCenter in my App and few minutes ago I tried to update to v3.3.0. Same problem, the build process fails on iOS.
I also tested a delete of bin and obj project folders but the problem remains.

After a simple downgrade of Xamarin.Forms.GoogleMaps package (only on iOS project) the app returned to build and work correctly.

My Xcode version is 11.1 (I don't use any preview version, only stable releases).

Following is a error from build log I think is responsible of the problem:

ld : warning : directory not found for option '-FGMps-3.5.0/Maps/Frameworks'
ld : warning : directory not found for option '-FGMps-3.5.0/Maps/Frameworks'
ld : warning : directory not found for option '-FGMps-3.5.0/Base/Frameworks'
MTOUCH : warning MT5215: References to 'System' might require additional -framework=XXX or -lXXX instructions to the native linker
clang : error : linker command failed with exit code 1 (use -v to see invocation)
error MT5209 : Native linking error : warning: directory not found for option '-FGMps-3.5.0/Maps/Frameworks'
error MT5209 : Native linking error : warning: directory not found for option '-FGMps-3.5.0/Maps/Frameworks'
error MT5209 : Native linking error : warning: directory not found for option '-FGMps-3.5.0/Base/Frameworks'
error MT5209 : Native linking error : framework not found GoogleMaps
MTOUCH : error MT5201: Native linking failed. Please review the build log and the user flags provided to gcc: -ObjC -ObjC -ObjC -lc++ -lz
MTOUCH : error MT5202: Native linking failed. Please review the build log.

I tested all the link options availble: Don't Link, Link framework and SDKs Only, Link all. No differences.

[Bustillox]

I have the same error as @simonemarra. i even tried using the solutions from Microsoft documentation (which can be seen here). Im looking forward for a solution. Thanks in advance! :)

[czenzel]

+1

[katkusmt]

+1

[jocontacter]

MTOUCH : error MT2101: Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void Google.Maps.Polyline::set_Spans(Google.Maps.StyleSpan[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'. [/Users/runner/runners/2.159.2/work/1/s/iOS/WorkingWithMaps.iOS.csproj]

1) Try to target ios project 9.0+ version. I am targeted to 10
2) Add Xamarin.Build.Download package to ios project
3) clean and rebuild

[jocontacter]

ld : warning : directory not found for option '-FGMps-3.5.0/Maps/Frameworks'

check my answer

[Pietervdw]

Adding the Xamarin.Build.Download NuGet package to my iOS project, as suggested by @jocontacter, was the solution. The project now builds on both my local machine and on AppCenter

[amnso]

I add the Xamarin.Build.Download NuGet package to my iOS project but have these problem

'GMps-3.5.0\Base\Frameworks\GoogleMapsBase.framework' could not be found.

'GMps-3.5.0\Maps\Frameworks\GoogleMaps.framework' could not be found.

'GMps-3.5.0\Maps\Frameworks\GoogleMapsCore.framework' could not be found.

[simonemarra]

It worked for me!!! thank you @jocontacter

[amnso]

@simonemarra Can you share simple ?

[jocontacter]

I add the Xamarin.Build.Download NuGet package to my iOS project but have these problem

'GMps-3.5.0\Base\Frameworks\GoogleMapsBase.framework' could not be found.

'GMps-3.5.0\Maps\Frameworks\GoogleMaps.framework' could not be found.

'GMps-3.5.0\Maps\Frameworks\GoogleMapsCore.framework' could not be found.

try to target ios project 9.0+

[mikthemonster]

How do you target ios project 9.0+ when using app center?

[jocontacter]

How do you target ios project 9.0+ when using app center?

I don't use the appcenter, but i think there is the same: edit info.plist

[ianvink]

After deleting the bin/obj of all projects _and_ adding the Build Nuget to every project _and_ targetted iOS 9 in the info.plist it worked for me.

Note: I had to add the NuGet to _all_ my projects.

[jocontacter]

After deleting the bin/obj of all projects _and_ adding the Build Nuget to every project _and_ targetted iOS 9 in the info.plist it worked for me.

Note: I had to add the NuGet to _all_ my projects.

now, after all of this, if you remove X.B.D package from .netstandard lib, your project will not be compiled? just interesting

[mikthemonster]

I still get the same build error in Visual Studio App Center. I tried all the suggestions:

I changed my Info.Plist (from 9.0 to 10.0):

MinimumOSVersion
10.0

And added Xamarin.Build.Download to all Xamarin projects.

Still the same error:
MTOUCH : error MT2101: Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void Google.Maps.Polyline::set_Spans(Google.Maps.StyleSpan[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'.

[jocontacter]

I still get the same build error in Visual Studio App Center. I tried all the suggestions:

I changed my Info.Plist (from 9.0 to 10.0):

MinimumOSVersion
10.0

And added Xamarin.Build.Download to all Xamarin projects.

Still the same error:
MTOUCH : error MT2101: Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void Google.Maps.Polyline::set_Spans(Google.Maps.StyleSpan[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'.

try >=12

[simonemarra]

Hi!
I'm still having issues using iOS13.2 and XCode 11.2 (11B52).
The app don't load correctly the maps, it has too much bugs, etc...

I don't know what is happening, but at the moment I downgraded my Xamarin.Forms.GoogleMaps version to 3.2.1 and it works correctly.

@amay077 at the moment I cannot manage to write down all the bugs using the last release version, and I don't know if it could be a good idea to try to update the Xamarin.Forms.GoogleMaps package if Apple doesn't stop to release updates on iOS at the same speed as I debug my App code (iOS13.2 was released before to have a Xcode stable version compatible!!!)

[mikthemonster]

I finally found a solution to my problem:

In Microsoft App Center there is a setting: “SDK version”. An old version was selected but as soon as I changed it to the latest version (13.4) it worked :-)

[yahiaalnaqeeb]

To resolve the problem your setting as following steps

• Downloaded Xamarin.Forms.GoogleMaps version 3.3.0
• Downloaded Xamarin.Google.IOS.Maps version 3.5.0

• Downloaded Xamarin.Build.Download version 0.4.11

• Open Info.plist

• in Deployment Info option
• make Deployment Target Equal to 9.0

it work for me correctly

[MrMiso]

Nothing worked for me until I updated to VS 2019 from VS 2017 and updated VS for Mac.

[Sigve84]

I get this one:
nuget/packages/xamarin.build.download/0.4.11/build/Xamarin.Build.Download.targets(74,3): error : Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
Done building project "" -- FAILED.

[kidhaxx]

I have the same problem with Xamarin.Build.Download.targets (0.4.11) or the last version.

• I clean Nugget cache
• Delete bin/obj folder
• Clean solution
• Check Deployment >= 9.0

But I always have this error :
nuget/packages/xamarin.build.download/0.4.11/build/Xamarin.Build.Download.targets(74,3): error : Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

[laitauchocolat]

any update ?

[AlonikiX]

Same issue, always get nuget/packages/xamarin.build.download/0.4.11/build/Xamarin.Build.Download.targets(74,3): error : Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

[AlonikiX]

Hi all, I think I have found a solution. If you check /Users/YOUR_USER_NAME/.nuget/packages/xamarin.google.ios.maps/3.5.0/lib/xamarinios10/Google.Maps.dll, the file size may be 0, and that's why the program couldn't load this dll.

Here is the steps to fix this issue:

1. Run the sample project, you should see a valid dll at /Xamarin.Forms.GoogleMaps-master/XFGoogleMapSample/packages/Xamarin.Google.iOS.Maps.3.5.0/lib/xamarinios10/Google.Maps.dll
2. Copy this dll, paste it to /Users/YOUR_USER_NAME/.nuget/packages/xamarin.google.ios.maps/3.5.0/lib/xamarinios10/Google.Maps.dll
3. Open your project, add Xamarin.Forms.GoogleMaps to your .netstandard project, and Xamarin.Forms.GoogleMaps and Xamarin.Google.iOS.Maps and Xamarin.Build.Download(v0.4.11) to your .iOS project.
4. Clean and Rebuild your project
5. Sometimes you may need to delete your packages folder and all bin and obj and restart everything
6. Run the app

It works well in my case, hope it will be helpful for you : )

[kidhaxx]

Hello !

When I try to run the sample project, I have the same error :

/Users/[USER]/Downloads/Xamarin.Forms.GoogleMaps-master/XFGoogleMapSample/packages/Xamarin.Build.Download.0.4.11/build/Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' (XFGoogleMapSample.iOS)

The size of DLL XFGoogleMapSample/packages/Xamarin.Google.iOS.Maps.3.5.0/lib/xamarinios10/Google.Maps.dll is always to 0 kb

[AlonikiX]

Hello !

When I try to run the sample project, I have the same error :

/Users/[USER]/Downloads/Xamarin.Forms.GoogleMaps-master/XFGoogleMapSample/packages/Xamarin.Build.Download.0.4.11/build/Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' (XFGoogleMapSample.iOS)

The size of DLL XFGoogleMapSample/packages/Xamarin.Google.iOS.Maps.3.5.0/lib/xamarinios10/Google.Maps.dll is always to 0 kb

try using this one, this is compiled from the sample project. https://drive.google.com/file/d/1Ll8UvWBvzp-5K5npWmJa1pybs5oyl-N8/view?usp=sharing

[davidbuckleyni]

Please never ever use dlls that have been precompiled always share the
source in another fork this could affect your machine.

On Sun, Dec 15, 2019 at 10:26 PM AlonikiX [e-mail] wrote:

Hello !

When I try to run the sample project, I have the same error :

/Users/[USER]/Downloads/Xamarin.Forms.GoogleMaps-master/XFGoogleMapSample/packages/Xamarin.Build.Download.0.4.11/build/Xamarin.Build.Download.targets(3,3):
Error: Did not find reference matching RestoreAssemblyResources
AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null' (XFGoogleMapSample.iOS)

The size of DLL
XFGoogleMapSample/packages/Xamarin.Google.iOS.Maps.3.5.0/lib/xamarinios10/Google.Maps.dll
is always to 0 kb

try using this one, this is compiled from the sample project.
https://drive.google.com/file/d/1Ll8UvWBvzp-5K5npWmJa1pybs5oyl-N8/view?usp=sharing

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[AlonikiX]

@davidbuckleyni Thanks for the suggestion, you are right about that. So @kidhaxx, even though I am the one who compiled this dll and using it myself, I won't recommend you to use this dll directly. However, I still don't know why the sample project cannot be compiled on some machines, so there is no source code I can share with you. The dll will serve as the final resort to the problem if you really want to get this library work but still cannot find any other solutions.

[kidhaxx]

Thanks @AlonikiX for your DLL. I'm not tested with this file for now.

I tested with many Solutions (map 3.2.1 + build.Download 0.44.11)... With the last version. But for each trial I every the same error... @AlonikiX can you give me your version of xcode, xamarin and visual plz?

Thanks for your help :)

[SergioAMG]

To resolve the problem your setting as following steps

• Downloaded Xamarin.Forms.GoogleMaps version 3.3.0
• Downloaded Xamarin.Google.IOS.Maps version 3.5.0
• Downloaded Xamarin.Build.Download version 0.4.11
• Open Info.plist
• in Deployment Info option
• make Deployment Target Equal to 9.0

it work for me correctly

It worked for me while nothing else did.

[AyonGupta]

@SergioAMG Still getting the error
"Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' "

[lupialex]

To resolve the problem your setting as following steps

• Downloaded Xamarin.Forms.GoogleMaps version 3.3.0
• Downloaded Xamarin.Google.IOS.Maps version 3.5.0
• Downloaded Xamarin.Build.Download version 0.4.11
• Open Info.plist
• in Deployment Info option
• make Deployment Target Equal to 9.0

it work for me correctly

It worked for me while nothing else did.

To resolve the problem your setting as following steps

• Downloaded Xamarin.Forms.GoogleMaps version 3.3.0
• Downloaded Xamarin.Google.IOS.Maps version 3.5.0
• Downloaded Xamarin.Build.Download version 0.4.11
• Open Info.plist
• in Deployment Info option
• make Deployment Target Equal to 9.0

it work for me correctly

It worked for me while nothing else did.

This solution not work for me. Do you have another solution?

[AyonGupta]

@amay077 Still getting the error
"Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' "

Any updates?

[stesvis]

@amay077 Still getting the error
"Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' "

Any updates?

Same here:

.nuget/packages/xamarin.build.download/0.4.11/build/Xamarin.Build.Download.targets(3,3): Error: Did not find reference matching RestoreAssemblyResources AssemblyName metadata 'Google.Maps, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'

[Pirate911]

Hi all ,
I tried all sugguestions here but none of them worked !
Any help is appreciated .

[nor0x]

Same for me - tried every solution but can't get it to work

[patriarch]

Any update ?

Nothing proposed helped

[sadiqoyapero]

Here are the steps that worked for me:

1. Uninstall Xamarin.Google.iOS.Maps 3.5.0 from your iOS project
2. Go to /Users/YOUR_USER_NAME/.nuget/packages/xamarin.google.ios.maps/, delete the folder named '3.5.0'.
3. Go back and install Xamarin.Google.iOS.Maps v3.1.0 to your .iOS project.
4. After v3.1.0 installs, upgrade Xamarin.Google.iOS.Maps to 3.5.0
5. Clean and Build your project
6. Run the app

Good luck!

[nor0x]

@sadiqoyapero works for me! Thanks

[patriarch]

@sadiqoyapero works for me also! Thanks a lot for the solution

[Pirate911]

Here are the steps that worked for me:

1. Uninstall Xamarin.Google.iOS.Maps 3.5.0 from your iOS project
2. Go to /Users/YOUR_USER_NAME/.nuget/packages/xamarin.google.ios.maps/, delete the folder named '3.5.0'.
3. Go back and install Xamarin.Google.iOS.Maps v3.1.0 to your .iOS project.
4. After v3.1.0 installs, upgrade Xamarin.Google.iOS.Maps to 3.5.0
5. Clean and Build your project
6. Run the app

Good luck!

I tried what you suggested exactly but it didn't work :(

[MarcoSal]

I have installed, uninstalled and updated several nuget packages. In the end I have Xamarin.Google.iOS.Maps 3.1.0, Xamarin.Forms.GoogleMaps 3.3.0 without Xamarin.Build.Download (installed and uninstalled).

[QXLTD]

I am able to resolve an issue with following NuGet package and its version could resolve your issue

• change deployment target for iOS project should be 9.0 or greater
• Xamarin.Forms.GoogleMaps (3.3.0) in all projects
• Xamarin.google.ios.maps (3.5.0) in iOS Project
• Xamarin.Build.Download (0.4.11) in Android & iOS Project

For more reference check configuration with this project Xamarin.Forms.GoogleMaps

[JimmyPun610]

Here are the steps that worked for me:

1. Uninstall Xamarin.Google.iOS.Maps 3.5.0 from your iOS project
2. Go to /Users/YOUR_USER_NAME/.nuget/packages/xamarin.google.ios.maps/, delete the folder named '3.5.0'.
3. Go back and install Xamarin.Google.iOS.Maps v3.1.0 to your .iOS project.
4. After v3.1.0 installs, upgrade Xamarin.Google.iOS.Maps to 3.5.0
5. Clean and Build your project
6. Run the app

Good luck!

I think this is working.
My flow

1. Install Xamarin.Forms.GoogleMaps 3.3
2. Install Xamarin.Google.iOS.Maps 3.7.0.1
3. Build and it success

[davidbuckleyni]

A few months to late this was posted in 2019 !