iOS: implement NestedSlider slidePosition

doric-js/lib/src/widget/nestedSlider.d.ts

@@ -11,6 +11,7 @@ export declare class NestedSlider extends Group {
     * Take effect only on iOS
     */
     scrollsToTop?: boolean;
+    slidePosition?: number;
     addSlideItem(view: View): void;
     slidePage(context: BridgeContext, page: number, smooth?: boolean): Promise<any>;
     getSlidedPage(context: BridgeContext): Promise<number>;

doric-js/lib/src/widget/nestedSlider.js

@@ -22,7 +22,7 @@ var __metadata = (this && this.__metadata) || function (k, v) {
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { Group, Property } from '../ui/view';
+import { Group, Property, InconsistProperty } from '../ui/view';
 export class NestedSlider extends Group {
     addSlideItem(view) {
         this.addChild(view);
@@ -50,3 +50,7 @@ __decorate([
     Property,
     __metadata("design:type", Boolean)
 ], NestedSlider.prototype, "scrollsToTop", void 0);
+__decorate([
+    InconsistProperty,
+    __metadata("design:type", Number)
+], NestedSlider.prototype, "slidePosition", void 0);