i am editing passsword entry in any random position cursor are auto selection next character for entry in ios xamarin?

Question

namespace Sample.iOS.Renderers
{
    public class LoginEntryRenderer : EntryRenderer
    {
        public LoginEntryRenderer()
        {
        }

        protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
        {
            base.OnElementChanged(e);

            if (Control != null)
            {
                Control.ShouldChangeCharacters += (textField, range, replacementString) =>
                {
                    string text = Control.Text;
                    var result = text.Substring(0, (int)range.Location) + replacementString + text.Substring((int)range.Location + (int)range.Length);
                    this.Element.Text = result;

                    if (e.NewElement != null)
                    {
                        if ((int)range.Length == 0)
                        {
                            e.NewElement.CursorPosition = (int)range.Location + 1;
                        }
                        else
                        {
                            e.NewElement.CursorPosition = (int)range.Location;
                        }
                    }
                    return false;
                };
            }
        }
    }
}

`

`strong text

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

When you edit the entry, there are two coniderations, delete or add characters, And shouldChangeCharactersInRange will be executed twice, please try to use Entry's textChange event.

   private void MyEntry_TextChanged(object sender, TextChangedEventArgs e)  
           {  
               
     
               var entry=sender as Entry;  
               var newValue=e.NewTextValue;  
               var oldValue=e.OldTextValue;  
               var CursorPostion= entry.CursorPosition  ;  
               if (oldValue==null)  
               {  
                     //entry is empty  
               }  
               else if(newValue.Length> oldValue.Length)  
               {  
                   //add value  
                   CursorPostion = entry.CursorPosition+2;  
                   if (CursorPostion< newValue.Length)  
                   {  
                       entry.CursorPosition = CursorPostion;  
                   }  
                     
                    
               }  
               else if( newValue.Length < oldValue.Length) {  
     
                   //delete value  
                   CursorPostion = entry.CursorPosition-2;  
                   if (CursorPostion >0 )  
                   {  
                       entry.CursorPosition = CursorPostion;  
                   }  
                   
               }  
                
           }  

Best Regards,

Leon Lu

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