添加 MapView#distanceFilter 接口

Fix #37
Close #41

components/maps/MapView.js

@@ -38,6 +38,13 @@ export default class MapView extends BaseComponent {
      */
     locationInterval: PropTypes.number,
 
+    /**
+     * 定位的最小更新距离
+     *
+     * @platform ios
+     */
+    distanceFilter: PropTypes.number,
+
     /**
      * 是否显示室内地图
      */

ios/AMapViewManager.m

@@ -42,6 +42,7 @@ RCT_EXPORT_VIEW_PROPERTY(coordinate, CLLocationCoordinate2D)
 RCT_EXPORT_VIEW_PROPERTY(limitRegion, MACoordinateRegion)
 RCT_EXPORT_VIEW_PROPERTY(tilt, CGFloat)
 RCT_EXPORT_VIEW_PROPERTY(rotation, CGFloat)
+RCT_EXPORT_VIEW_PROPERTY(distanceFilter, CLLocationDistance)
 
 RCT_EXPORT_VIEW_PROPERTY(onPress, RCTBubblingEventBlock)
 RCT_EXPORT_VIEW_PROPERTY(onLongPress, RCTBubblingEventBlock)