ios_new.diff

diff --git a/platform/ios/app/MBXViewController.m b/platform/ios/app/MBXViewController.m
index feebb59..443265d 100644
--- a/platform/ios/app/MBXViewController.m
+++ b/platform/ios/app/MBXViewController.m
@@ -170,6 +170,28 @@ typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {
         }
         [self presentViewController:alertController animated:YES completion:nil];
     }
+
+    [self performSelector:@selector(addTestShapes) withObject:nil afterDelay:1];
+}
+
+- (void)mapViewRegionIsChanging:(MGLMapView *)mapView
+{
+    // update tail coordinate
+//    CLLocationCoordinate2D center = mapView.centerCoordinate;
+//    MGLPolyline *line = (MGLPolyline *)mapView.annotations.firstObject;
+//    CLLocationCoordinate2D *coordinates = malloc(2 * sizeof(CLLocationCoordinate2D));
+//    [line getCoordinates:coordinates range:NSMakeRange(0, 2)];
+//    coordinates[1] = center;
+//    [line setCoordinates:coordinates range:NSMakeRange(0, 2)];
+//    free(coordinates);
+
+    // append coordinate to tail
+    CLLocationCoordinate2D center = mapView.centerCoordinate;
+    MGLPolyline *line = (MGLPolyline *)mapView.annotations.firstObject;
+    CLLocationCoordinate2D *coordinates = malloc(1 * sizeof(CLLocationCoordinate2D));
+    coordinates[0] = center;
+    [line setCoordinates:coordinates range:NSMakeRange(line.pointCount, 1)];
+    free(coordinates);
 }

 - (void)saveState:(__unused NSNotification *)notification
@@ -539,6 +561,24 @@ typedef NS_ENUM(NSInteger, MBXSettingsMiscellaneousRows) {

 - (void)addTestShapes
 {
+    CLLocationCoordinate2D center = self.mapView.centerCoordinate;
+    CLLocationCoordinate2D lineCoordinates[2] = {
+        CLLocationCoordinate2DMake(45, -122),
+        center
+    };
+    MGLPolyline *line = [MGLPolyline polylineWithCoordinates:lineCoordinates count:2];
+    [self.mapView addAnnotation:line];
+
+//    CLLocationCoordinate2D polygonCoordinates[3] = {
+//        CLLocationCoordinate2DMake(44, -122),
+//        CLLocationCoordinate2DMake(46, -122),
+//        center
+//    };
+//    MGLPolygon *shape = [MGLPolygon polygonWithCoordinates:polygonCoordinates count:3];
+//    [self.mapView addAnnotation:shape];
+
+    return;
+
     // Pacific Northwest triangle
     //
     CLLocationCoordinate2D triangleCoordinates[3] =