fix #112

Author: PeterStaev

.vscode/settings.json

@@ -6,5 +6,6 @@
         "demo": true, 
         "demo-ng": true, 
         "bin/**": true
-    }
+    },
+    "typescript.tsdk": "node_modules/typescript/lib"
 }

demo/app/app.css

@@ -8,6 +8,8 @@
     text-align: center;
     text-decoration: underline;
     margin: 20;
+    border-width: 2;
+    border-color: black;
 }
 .changed-styles {
     padding: 10;

drop-down.ios.ts

@@ -33,7 +33,6 @@ import {
     DropDownBase,
     Length,
     backgroundColorProperty,
-    backgroundInternalProperty,
     colorProperty,
     fontInternalProperty,
     hintProperty,
@@ -191,13 +190,6 @@ export class DropDown extends DropDownBase {
         this._listPicker.reloadAllComponents();
     }
 
-    public [backgroundInternalProperty.getDefault](): UIColor {
-        return null;
-    }
-    public [backgroundInternalProperty.setNative](value: Color) {
-        //
-    }
-
     public [fontInternalProperty.getDefault](): UIFont {
         return this.nativeView.font;
     }