Objective c binding not loading in xamarin forms ios - ios

Question

I am building my first objective c library binding. I am following this documentation from Microsoft. I have successfully created a fat binary from IronSource.framework and have also generated apidefinition and structs using objective sharpie and added my binary to it.
After doing that I added binding library to my xamarin.ios project. when i try to create a new instance of a class from the exposed API I get an error.
The type or namespace name 'IronSource' could not be found (are you missing a using directive or an assembly reference?) Stock.iOS D:\Backup Version for Stock Adviser\Version 1.6\Version code 37\StockAdviserCode\Stock\Stock\Stock.iOS\AdControlViewRenderer.cs
'AdControlViewRenderer.BannerWrapper' does not implement inherited
abstract member
'ISBannerDelegate.DidClickBanner()' Stock.iOS D:\Backup Version for
Stock Adviser\Version 1.6\Version code
37\StockAdviserCode\Stock\Stock\Stock.iOS\AdControlViewRenderer.cs
I think my objective c library and xamarin.ios project are not linking properly
My Binding project name is IronSource and my xamarin forms ios project name is Stock.iOS
//APIDefinition
using System;
using Foundation;
using ObjCRuntime;
using UIKit;
namespace IronSource
{
// #interface ISBannerView : UIView
[BaseType(typeof(UIView))]
interface ISBannerView
{
}
// #protocol ISBannerDelegate <NSObject>
[BaseType(typeof(NSObject))]
[Model]
interface ISBannerDelegate
{
// #required -(void)bannerDidLoad:(ISBannerView *)bannerView;
[Abstract]
[Export("bannerDidLoad:")]
void BannerDidLoad(ISBannerView bannerView);
// #required -(void)bannerDidFailToLoadWithError:(NSError *)error;
[Abstract]
[Export("bannerDidFailToLoadWithError:")]
void BannerDidFailToLoadWithError(NSError error);
// #required -(void)didClickBanner;
[Abstract]
[Export("didClickBanner")]
void DidClickBanner();
// #required -(void)bannerWillPresentScreen;
[Abstract]
[Export("bannerWillPresentScreen")]
void BannerWillPresentScreen();
// #required -(void)bannerDidDismissScreen;
[Abstract]
[Export("bannerDidDismissScreen")]
void BannerDidDismissScreen();
// #required -(void)bannerWillLeaveApplication;
[Abstract]
[Export("bannerWillLeaveApplication")]
void BannerWillLeaveApplication();
}
}
//my xamarin.ios
using System;
using CoreGraphics;
using Foundation;
using Stock.iOS;
using Stock.Services;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using IronSource;
[assembly: ExportRenderer(typeof(AdControlView), typeof(AdControlViewRenderer))]
namespace Stock.iOS
{
public class AdControlViewRenderer : ViewRenderer
{
public AdControlViewRenderer()
{ }
protected AdControlView AdViewControl => (AdControlView)Element;
protected override void OnElementChanged(ElementChangedEventArgs<View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
return;
IronSource ironSource = new IronSource();
SetNativeControl();
}
private void SetNativeControl()
{
try
{
BannerWrapper bannerWrapper = new BannerWrapper(ViewController);
IronSource.SetBannerDelegate(bannerWrapper);
var bannerSize = new ISBannerSize("BANNER");
IronSource.LoadBannerWithViewController(ViewController, bannerSize);
var adview = bannerWrapper.BannerView();
SetNativeControl(adview);
}
catch (Exception ex)
{
}
}
}
public class BannerWrapper : ISBannerDelegate
{
readonly UIViewController parent;
ISBannerView bannerView = null;
public bool DestroyBanner()
{
if (bannerView != null)
{
IronSource.DestroyBanner(bannerView);
bannerView = null;
return true;
}
return false;
}
public BannerWrapper(UIViewController viewController)
{
this.parent = viewController;
}
public override void BannerDidClick()
{
}
public override void BannerDidDismissScreen()
{
}
public override void BannerDidFailToLoadWithError(NSError error)
{
}
public ISBannerView BannerView()
{
ISBannerView bannerView = new ISBannerView();
nfloat y = this.parent.View.Frame.Size.Height - (bannerView.Frame.Size.Height / 2);
if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
{
y -= this.parent.View.SafeAreaInsets.Bottom;
}
bannerView.Center = new CGPoint(this.parent.View.Frame.Size.Width / 2, y);
return bannerView;
}
public override void BannerDidLoad(ISBannerView bnView)
{
InvokeOnMainThread(() =>
{
bannerView = bnView;
nfloat y = this.parent.View.Frame.Size.Height - (bannerView.Frame.Size.Height / 2);
if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
{
y -= this.parent.View.SafeAreaInsets.Bottom;
}
bannerView.Center = new CGPoint(this.parent.View.Frame.Size.Width / 2, y);
this.parent.View.AddSubview(bannerView);
bannerView.AccessibilityLabel = "bannerContainer";
});
}
public override void BannerWillLeaveApplication()
{
}
public override void BannerWillPresentScreen()
{
}
}
}
Any help is welcome

Answer 1

So, I was able to make it work by adding fat binary to Xamarin.ios and changed the build type from "Do not copy" to "Copy Always" and then added a linker to that fat binary using
-cxx -gcc_flags "-L${ProjectDir} -lIronSource -force_load ${ProjectDir}/IronSource.a
I used this GitHub repo for guidance.
Overall to setup IronSoruce, I had to add dll in references, native framework to native reference, fat binary to projectdir and add linker to fat binary.