CustomEditorRenderer.cs

using System;
using System.ComponentModel;
using CoreGraphics;
using Foundation;
using KeyboardOptionsSample;
using KeyboardOptionsSample.iOS;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(CustomEditor), typeof(CustomEditorRenderer))]
namespace KeyboardOptionsSample.iOS
{
    public class CustomEditorRenderer : EditorRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
        {
            base.OnElementChanged(e);

            if (Control == null && Element == null) return;
            var element = Element as CustomEditor;

            if (element.HasExtraOptions)
            {
                Control.InputAccessoryView = new UIView(new CGRect(0, 0, UIScreen.MainScreen.Bounds.Width, 42))
                {
                    BackgroundColor = UIColor.White
                };

                var line = new UIView(new CGRect(0, 0, Control.InputAccessoryView.Frame.Width, 1));
                line.BackgroundColor = UIColor.LightGray;

                var btn1 = new UIButton(new CGRect(0, 1, 160, 41));
                btn1.SetTitle("Attach media", UIControlState.Normal);
                btn1.SetTitleColor(UIColor.Blue, UIControlState.Normal);
                btn1.TitleEdgeInsets = new UIEdgeInsets(0, 20, 0, 0);
                btn1.Font = UIFont.BoldSystemFontOfSize(15f);

                btn1.SetImage(UIImage.FromFile("GalleryIcon.png"), UIControlState.Normal);
                btn1.SetTitleColor(UIColor.FromRGB(78, 101, 202), UIControlState.Normal);
                btn1.TouchUpInside += element.OnAttachMediaEvent;

                var btn2 = new UIButton(new CGRect(Control.InputAccessoryView.Frame.Width - 160, 1, 160, 41));
                btn2.SetTitle("Take a photo", UIControlState.Normal);
                btn2.TitleEdgeInsets = new UIEdgeInsets(0, 0, 0, 20);
                btn2.Font = UIFont.BoldSystemFontOfSize(15f);
                btn2.SemanticContentAttribute = UISemanticContentAttribute.ForceRightToLeft;
                btn2.SetImage(UIImage.FromFile("CameraIcon.png"), UIControlState.Normal);
                btn2.SetTitleColor(UIColor.Blue, UIControlState.Normal);
                btn2.SetTitleColor(UIColor.FromRGB(78, 101, 202), UIControlState.Normal);
                btn2.TouchUpInside += element.OnTakePhotoEventEvent;
                Control.InputAccessoryView.Add(line);
                Control.InputAccessoryView.Add(btn1);
                Control.InputAccessoryView.Add(btn2);

                Control.InputAccessoryView.AutoresizingMask = UIViewAutoresizing.All;
                Control.ReturnKeyType = UIReturnKeyType.Send;

            }
        }
    }
}