Fixed an iOS shape view issue.

sample/HotUI.Samples/DemoCreditCardView.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 
 namespace HotUI.Samples
 {
-    class CreditCard : BindingObject
+    public class CreditCard : BindingObject
     {
         public string Number
         {

src/HotUI.iOS/Controls/HUIShapeView.cs

@@ -35,7 +35,7 @@ namespace HotUI.iOS
             {
                 var drawingStyle = Shape.GetDrawingStyle(View, DrawingStyle.StrokeFill);
 
-                var lineWidth = 1f;
+                var lineWidth = Shape.GetLineWidth(View, 1);
                 var strokeColor = Color.Black;
                 object fill = null;
                 
@@ -123,7 +123,6 @@ namespace HotUI.iOS
 
                 if (drawingStyle == DrawingStyle.Stroke || drawingStyle == DrawingStyle.StrokeFill)
                 {
-                    lineWidth = Shape.GetLineWidth(View, 1);
                     strokeColor = Shape.GetStrokeColor(View, Color.Black);
 
                     context.SetLineWidth(lineWidth);