Animate annotation updates

Instead of removing and re-adding annotations which causes the
annotation to flash, changing annotations now animate to their
new location.

Author: zbarbuto

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 1.3.0
+
+* Animate marker position changes instead of removing and re-adding
 ## 1.2.0
 
 * Added a `markerAnnotationWithHue()` and `pinAnnotationWithHue()` method to allow custom marker/pin colors

ios/Classes/Annotations/AnnotationController.swift

@@ -94,7 +94,7 @@ extension AppleMapController: AnnotationDelegate {
                 let newAnnotation = FlutterAnnotation.init(fromDictionary: annotationData, registrar: registrar)
                 if annotationToChange != newAnnotation {
                     if !annotationToChange.wasDragged {
-                        addAnnotation(annotation: newAnnotation)
+                        updateAnnotation(annotation: newAnnotation)
                     } else {
                         annotationToChange.wasDragged = false
                     }
@@ -204,6 +204,16 @@ extension AppleMapController: AnnotationDelegate {
         self.mapView.addAnnotation(annotation)
     }
 
+    private func updateAnnotation(annotation: FlutterAnnotation) {
+        if self.annotationExists(with: annotation.id) {
+            UIView.animate(withDuration: 0.32, animations: {
+                let oldAnnotation = self.getAnnotation(with: annotation.id)
+                oldAnnotation?.coordinate = annotation.coordinate
+                oldAnnotation?.title = annotation.title
+            })
+        }
+    }
+
     private func getNextAnnotationZIndex() -> Double {
         let mapViewAnnotations = self.mapView.getMapViewAnnotations()
         if mapViewAnnotations.isEmpty {

pubspec.yaml

@@ -1,6 +1,6 @@
 name: apple_maps_flutter
 description: This plugin uses the Flutter platform view to display an Apple Maps widget.
-version: 1.2.0
+version: 1.3.0
 homepage: https://luisthein.de
 repository: https://github.com/LuisThein/apple_maps_flutter
 issue_tracker: https://github.com/LuisThein/apple_maps_flutter/issues