Creating a custom annotation tool in Xamarin.iOS

It is possible to create a new tool via C# API if you are looking for very simple tools that do not require much UI. Otherwise, you will have to customize the tools source code in Objective-C . The following section describes how to create a simple tool via C# API.

1. Creating CustomTool:

   using System;
   using ObjCRuntime;
   using pdftron.PDF;
   
   namespace PDFNetiOSXamarinSample
   {
       public class CustomTool : pdftron.PDF.Tools.PTCreateToolBase
       {
           public CustomTool(PDFViewCtrl ctrl) : base(ctrl)
           {
           }
   
           public override bool CreatesAnnotation
           {
               get
               {
                   return true;
               }
           }
   
           public override Class AnnotClass
           {
               get
               {
                   return new Class(typeof(pdftronprivate.PTRedactionAnnot));
               }
           }
       }
   
   }

2. Using the tool:

mToolManager.Tool = new CustomTool(mPdfViewCtrl);

To learn more about how to modify the tools source code in Objective-C, check out this guide: Creating a new tool .