ui adjustment

Pixiview.iOS/Renderers/RoundImageRenderer.cs

@@ -0,0 +1,56 @@
+using CoreAnimation;
+using Pixiview.iOS.Renderers;
+using Pixiview.UI;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.iOS;
+
+[assembly: ExportRenderer(typeof(RoundImage), typeof(RoundImageRenderer))]
+namespace Pixiview.iOS.Renderers
+{
+    public class RoundImageRenderer : ImageRenderer
+    {
+        protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
+        {
+            base.OnElementChanged(e);
+
+            var layer = Layer;
+            if (layer != null && e.NewElement is RoundImage image)
+            {
+                bool flag = false;
+                if (image.CornerRadius > 0)
+                {
+                    layer.CornerRadius = image.CornerRadius;
+                    flag = true;
+                }
+                var mask = image.CornerMasks;
+                if (mask != CornerMask.None)
+                {
+                    var m = default(CACornerMask);
+                    if ((mask & CornerMask.LeftTop) == CornerMask.LeftTop)
+                    {
+                        m |= CACornerMask.MinXMinYCorner;
+                    }
+                    if ((mask & CornerMask.RightTop) == CornerMask.RightTop)
+                    {
+                        m |= CACornerMask.MaxXMinYCorner;
+                    }
+                    if ((mask & CornerMask.LeftBottom) == CornerMask.LeftBottom)
+                    {
+                        m |= CACornerMask.MinXMaxYCorner;
+                    }
+                    if ((mask & CornerMask.RightBottom) == CornerMask.RightBottom)
+                    {
+                        m |= CACornerMask.MaxXMaxYCorner;
+                    }
+
+                    layer.MaskedCorners = m;
+                    flag = true;
+                }
+                if (flag)
+                {
+                    layer.MasksToBounds = true;
+                }
+            }
+        }
+    }
+}