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public override void ViewDidLoad()
{
      base.ViewDidLoad();
	
      // Set self as the Scene View's delegate
      SceneView.Delegate = this;
      // Track changes to the session
      SceneView.Session.Delegate = new SessionDelegate();
      SceneView.Scene.PhysicsWorld.ContactDelegate = new PhysicsDelegate();

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public override void TouchesBegan(NSSet touches, UIEvent evt)
{
   var forcePower = 10;
   base.TouchesBegan(touches, evt);
   var pointOfView = this.SceneView.PointOfView;
   var transform = pointOfView.Transform;
   var location = new SCNVector3(transform.M41, transform.M42, transform.M43);
   var orientation = new SCNVector3(-transform.M31, -transform.M32, -transform.M33);
   var position = location + orientation;
   var pokeball = new SCNNode()

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using System;
using System.Globalization;
using Xamarin.Forms;

namespace RelativeTimeSample.Helpers
{
    public class RelativeDateTimeConvertor: IValueConverter
    {
        const int SECOND = 1;
        const int MINUTE = 60 * SECOND;

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<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" 
             x:Class="RelativeTimeSample.Views.MainPage"
             xmlns:converter="clr-namespace:RelativeTimeSample.Helpers"
             Title="News">
    <ContentPage.Resources>
          <ResourceDictionary>
           <converter:RelativeDateTimeConvertor x:Key="RelativeDateTimeConvertor" />
        </ResourceDictionary>

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 <Label HorizontalOptions="EndAndExpand"  Text="{Binding Date, Converter={StaticResource RelativeDateTimeConvertor}}" FontSize="12"/>
                                        

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  //Llamo ese codigo para coger la imagen del picker 
  let image = imageView.image
        if image != nil{
            let imageData:Data = UIImageJPEGRepresentation(image!, 1.0)!
            let path:String = self.documentsDirectoryPath.appendingPathComponent(self.tempImageName)
            try? UIImageJPEGRepresentation(image!, 1.0)!.write(to: URL(fileURLWithPath: path), options: [.atomic])
            self.imageURL = URL(fileURLWithPath: path)
            try? imageData.write(to: self.imageURL, options: [.atomic])
            let File:CKAsset?  = CKAsset(fileURL: URL(fileURLWithPath: path))
            CloudKitHelper.setMyFullName(loginTextField.text!, image: File)

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using System;
using Xamarin.Forms;

namespace ExtendedEditorSample.Controls
{
    public class ExtendedEditorControl : Editor
    {
        public static BindableProperty PlaceholderProperty
          = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(ExtendedEditorControl));

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using System;
using Xamarin.Forms;

namespace ExtendedEditorSample.Controls
{
    public class ExtendedEditorControl : Editor
    {
        public static BindableProperty PlaceholderProperty
          = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(ExtendedEditorControl));

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using System.ComponentModel;
using Android.Content;
using Android.Content.Res;
using Android.Graphics.Drawables;
using ExtendedEditorSample.Controls;
using ExtendedEditorSample.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(ExtendedEditorControl), typeof(CustomEditorRenderer))]

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using System.ComponentModel;
using ExtendedEditorSample.Controls;
using ExtendedEditorSample.iOS;
using Foundation;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(ExtendedEditorControl), typeof(CustomEditorRenderer))]
namespace ExtendedEditorSample.iOS