ImageButton for Xamarin.Forms (iOS & Android)

ImageButton.cs

using System;
using Xamarin.Forms;

namespace NAMESPACE.Controls
{
	public class ImageButton : Button
	{

	}
}

ImageButtonRenderer_Droid.cs

using System;
using Xamarin.Forms;
using NAMESPACE.Droid;
using Xamarin.Forms.Platform.Android;
using Android.Graphics;

[assembly: ExportRenderer (typeof(NAMESPACE.Controls.ImageButton), typeof(ImageButtonRenderer))]
namespace NAMESPACE.Droid
{
	public class ImageButtonRenderer : ButtonRenderer
	{
		protected override void OnLayout (bool changed, int l, int t, int r, int b)
		{
			base.OnLayout (changed, l, t, r, b);
			if (changed) {
				var drawables = Control.GetCompoundDrawables ();
				if (drawables [0] != null) {
					Rect drawableBounds = new Rect ();
					drawables [0].CopyBounds (drawableBounds);
					int leftOffset = ((Control.Width - Control.PaddingLeft - Control.PaddingRight) - drawableBounds.Width ()) / 2;
					drawableBounds.Offset (leftOffset, 0);
					drawables [0].SetBounds (drawableBounds.Left, drawableBounds.Top, drawableBounds.Right, drawableBounds.Bottom);
				}
			}
		}
	}
}

ImageButtonRenderer_iOS.cs

using System;
using Xamarin.Forms;
using NAMESPACE.iOS;
using Xamarin.Forms.Platform.iOS;
using UIKit;

[assembly: ExportRenderer (typeof(NAMESPACE.Controls.ImageButton), typeof(ImageButtonRenderer))]
namespace NAMESPACE.iOS
{
	public class ImageButtonRenderer : ButtonRenderer
	{
		protected override void OnElementChanged (ElementChangedEventArgs<Button> e)
		{
			base.OnElementChanged (e);
			if (Control != null) {
				var imgSize = Control.ImageView.Frame.Size;
				var ctrlSize = Control.Frame.Size;
				var offSet = ((ctrlSize.Width - imgSize.Width) / 2);
				Control.ImageEdgeInsets = new UIEdgeInsets (Control.ImageEdgeInsets.Top, offSet, Control.ImageEdgeInsets.Bottom, offSet);
			}
		}
	}
}