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Editorial Team
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Asked: 2026-05-26T13:24:54+00:00

Has anyone actually managed to accomplish this? I tried the approach suggested here ,

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Has anyone actually managed to accomplish this?

I tried the approach suggested here, but no matter how i generate the precompiled serializer, mtouch fails to copy it to the app bundle, thus resulting in a runtime exception. I think this happens because the resulting binary may not be compatible with MonoTouch.

I have tried the following:

1) I used the provided iOs and Mono binaries included in the latest (r450 as this time) build in order to generate the precompiled serializer.

2) I used the source code to produce two different assemblies, built for MonoTouch. The first assembly is built using the symbols FEAT_SAFE;MONOTOUCH;NO_RUNTIME and the second is built using the symbols FEAT_SAFE;MONOTOUCH;FEAT_COMPILER. I have defined the symbol MONOTOUCH and used it the same as MONODROID symbol is used (see file CallbackAttribute.cs and Helpers.cs in the protobuf-net source).

I the used this two assemblies and tried to generate the precompiled serializer from a MonoTouch application in the simulator.

But no matter which version of the precompiled serializer i use, the assembly is still not included in the app bundle, with mtouch issuing: “Warning: Library ‘MyLibrary.dll’ missing in app bundle, cannot extract content”, despite the fact that i do reference it in my code.

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1 Answer

  1. Editorial Team

    I finally got it. It seems that when the actual assembly name is different from the file name that contains it mtouch will not include it in the application bundle. And that was happening in my case. I am generating the assembly like this:

    model.Compile("Taxi.ProtoBufSerializers.MQTTContractsSerializer", "MQTTContractsSerializer.dll");

    So, given that Protobuf-Net sets the assembly name to the first parameter of this method and saves it in the file name given by the second parameter, mtouch will fail to include it in the application bundle.

    However, i wanted to keep my namespace so i fiddled with Protobuf-Net’s source code to generate the assembly like this:

    • File path: Given as the second parameter;
    • Assembly name: Path.GetFileNameWithoutExtension(path);
    • Module name: Path.GetFileName(path).

    I am not performing any validations on the path at this time, but i don’t need to do this just yet.

    And voila: The sample works both on the simulator and the device.

    Last but not least, i don’t know if this is the way mtouch is supposed to behave or if it is a bug. I will however file a bug report against it.

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