[camera] Fix camera memory leak on IOS

packages/camera/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.5.2+2
+
+* Fix memory leak related to not unregistering stream handler in FlutterEventChannel when disposing camera.
+
 ## 0.5.2+1
 
 * Fix bug that prevented video recording with audio.

packages/camera/ios/Classes/CameraPlugin.m

@@ -732,6 +732,8 @@ - (void)handleMethodCallAsync:(FlutterMethodCall *)call result:(FlutterResult)re
     } else if ([@"dispose" isEqualToString:call.method]) {
       [_registry unregisterTexture:textureId];
       [_camera close];
+      // need to unregister stream handler when disposing the camera
+      [_camera.eventChannel setStreamHandler:nil];
       _dispatchQueue = nil;
       result(nil);
     } else if ([@"prepareForVideoRecording" isEqualToString:call.method]) {

packages/camera/pubspec.yaml

@@ -2,7 +2,7 @@ name: camera
 description: A Flutter plugin for getting information about and controlling the
   camera on Android and iOS. Supports previewing the camera feed, capturing images, capturing video,
   and streaming image buffers to dart.
-version: 0.5.2+1
+version: 0.5.2+2
 authors:
   - Flutter Team <flutter-dev@googlegroups.com>
   - Luigi Agosti <luigi@tengio.com>