rename from Pixiview to Gallery

Gallery.iOS/Effects/LongPressEffectImplement.cs

@@ -0,0 +1,57 @@
+using Gallery.iOS.Effects;
+using Gallery.Utils;
+using UIKit;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.iOS;
+
+[assembly: ResolutionGroupName("Gallery")]
+[assembly: ExportEffect(typeof(LongPressEffectImplement), "LongPressEffect")]
+namespace Gallery.iOS.Effects
+{
+    public class LongPressEffectImplement : PlatformEffect
+    {
+        private bool attached;
+        private readonly UILongPressGestureRecognizer longPressGesture;
+
+        public LongPressEffectImplement()
+        {
+            longPressGesture = new UILongPressGestureRecognizer(OnLongPressed);
+        }
+
+        protected override void OnAttached()
+        {
+            if (!attached)
+            {
+                attached = true;
+                Container.AddGestureRecognizer(longPressGesture);
+            }
+        }
+
+        protected override void OnDetached()
+        {
+            if (attached)
+            {
+                attached = false;
+                Container.RemoveGestureRecognizer(longPressGesture);
+            }
+        }
+
+        private void OnLongPressed(UILongPressGestureRecognizer e)
+        {
+            if (e.State != UIGestureRecognizerState.Began)
+            {
+                return;
+            }
+            var element = Element;
+            if (element != null)
+            {
+                var command = LongPressEffect.GetCommand(element);
+                if (command != null)
+                {
+                    var o = LongPressEffect.GetCommandParameter(element);
+                    command.Execute(o);
+                }
+            }
+        }
+    }
+}