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Objective-C in Mono

I have a .NET application, which I want to port to OSX. Up to now I used a DirectShow DLL for WebCam handling. Can I use an Objective-C DLL for Mono? How? I'm a newbie on Mac. Is there an existing (WebCam handling) solution for this? Is there a better solution?

Solution

  • You want to use the QTKit framework to do this, in particular you can use the QTCaptureView as a reusable NSView that you can embed in an existing window or in an application to do the actual video capturing.

    I have just added support for capturing to the MonoMac bindings a few minutes ago after I saw your question, so you will need to do a little bit of work.

    Steps:

    1. Install Mono, MonoDevelop and the MonoMac addin as described here: http://mono-project.com/MonoMac

    2. Download the latest sources for MonoMac and MacCore from Github: http://github.com/mono/maccore and http://github.com/mono/monomac

    3. Update the MonoMac.dll to the latest version, by going into the monomac/src directory and typing "make update"

    At this point you should be able to use the QTCaptureView in your MonoMac applications like any other NSView. A tutorial showing the use of the API in Objective-C is here:

    http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/QTKitApplicationTutorial/BuildingaSimpleQTKitCaptureApplication/BuildingaSimpleQTKitCaptureApplication.html#//apple_ref/doc/uid/TP40008155-CH8-SW1

    You can just use the equivalent versions in C#