fix: remove controller dispose and add removeListener (#16)

CHANGELOG.md

@@ -1,3 +1,8 @@
+## NEXT
+
+- **BREAKING CHANGE**:
+  - `CardSwiperController` is no longer disposed by `CardSwiper`, but who created it must dispose it.
+
 ## [4.1.3]
 
 - Fix Swiping when `isDisabled` is `true` and triggered by the `controller`.

example/lib/main.dart

@@ -26,6 +26,12 @@ class _ExamplePageState extends State<Example> {
 
   final cards = candidates.map((candidate) => ExampleCard(candidate)).toList();
 
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(

lib/src/card_swiper.dart

@@ -201,7 +201,7 @@ class _CardSwiperState<T extends Widget> extends State<CardSwiper>
   void dispose() {
     super.dispose();
     _animationController.dispose();
-    widget.controller?.dispose();
+    widget.controller?.removeListener(_controllerListener);
   }
 
   @override