Binding with objective Sharpie outputs huge files

Question

I am trying to bind my swift framework with Xamarin. I am using objective Sharpie for this.

I have set 'Enable Bitcode' to 'No' in the framework.
Built the framework for running.
Use the following command for binding the header file.

sharpie bind -sdk iphoneos11.1 MyFramework.framework/Headers/MyFramework-Swift.h -output=MyFrameworkCS -namespace=MyFramework

I got the APIDefinitions.cs file but its more than 79 thousand lines and has lots of errors. The StructsAndEnums.cs file is huge as well.

My framework(and the .h file) has import statements for only UIKit, AVFoundation and Foundation. But the APIDefinitions.cs has this.

using System;
using AVFoundation;
using AudioToolbox;
using AudioUnit;
using CloudKit;
using CoreAnimation;
using CoreAudio;
using CoreData;
using CoreFoundation;
using CoreGraphics;
using CoreImage;
using CoreLocation;
using CoreMIDI;
using CoreMedia;
using CoreMidi;
using CoreText;
using CoreVideo;
using Darwin;
using Dispatch;
using FileProvider;
using Foundation;
using HyperSecureSDK;
using IOSurface;
using ImageIO;
using Intents;
using MediaToolbox;
using Metal;
using ObjCRuntime;
using ObjectiveC;
using OpenGLES;
using Security;
using UIKit;
using simd;

I am very new to Xamarin and super stuck here. Any help would be greatly appreciated!

`MyFramework-Swift.h` : 1) What is in that header file, what includes does it include? 2) Swift frameworks are not supported out of the box, there are ways to "kludge" them — SushiHangover, Nov 22 '17 at 05:50
MyFramework-Swift.h is the header file generated along with the framework in the derived data(MyFramework.framework/headers).It looks similar to this file: https://github.com/Flash3001/iOSCharts.Xamarin/blob/master/Charts.framework/Headers/Charts-Swift.h. I am following this tutorial: https://medium.com/@Flash3001/binding-swift-libraries-xamarin-ios-ff32adbc7c76. Any pointers on how to make the header file work? — Srinija, Nov 22 '17 at 06:56

score 5 · Answer 1 · answered Mar 05 '18 at 11:51

You need to define a scope so that not all of the other libraries are showing up in your APIDefinition.cs as stated in https://developer.xamarin.com/guides/cross-platform/macios/binding/objective-sharpie/examples/advanced/

You will notice that we passed a -scope build/Headers argument to Objective Sharpie. Because C and Objective-C libraries must #import or include other header files that are implementation details of the library and not API you wish to bind, the -scope argument tells Objective Sharpie to ignore any API that is not defined in a file somewhere within the -scope directory.

You will find the -scope argument is often optional for cleanly implemented libraries, however there is no harm in explicitly providing it.

This should remove all the bindings of other libraries in your APIDefinition.cs

sharpie bind -sdk iphoneos11.1 -scope MyFramework.framework/Headers/ MyFramework.framework/Headers/MyFramework-Swift.h
-output=MyFrameworkCS -namespace=MyFramework

Thanks, this helped me alot – Bathant Hegazy Mar 05 '20 at 14:29 — Bathant Hegazy, Mar 05 '20 at 14:29

score 5 · Answer 2 · answered Mar 28 '18 at 01:59

5

You need to limit your scope adding the path where the headers are living. Use the -scope command and library/Headers/ parameter.

eg. sharpie bind -sdk iphoneos11.2 -output myLibrary -scope myLibrary/Headers/ mainHeader.h

Hope can help you.

answered Mar 28 '18 at 01:59

Adlair Cerecedo-Mendez

231
3
8

score 1 · Answer 3 · answered Nov 30 '17 at 04:04

1

Please see my post:

Trouble binding Objective-C library to C# with Objective Sharpie

You'll want to use the fantastic tool objc-automatic:

https://github.com/alexsorokoletov/objc-automatic

answered Nov 30 '17 at 04:04

sbonkosky

2,537
1
22
31

2

Wonderful tool! – Adlair Cerecedo-Mendez Mar 28 '18 at 02:00

Binding with objective Sharpie outputs huge files

3 Answers3