Add implementation of didFinishProcessingPhoto callback

Author: mvanbeusekom

packages/camera/camera/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.1
+
+* Added implementation of the `didFinishProcessingPhoto` on iOS which allows saving image metadata (EXIF) on iOS 11 and up.
+
 ## 0.6.0
 
 As part of implementing federated architecture and making the interface compatible with the web this version contains the following **breaking changes**:

packages/camera/camera/ios/Classes/CameraPlugin.m

@@ -76,6 +76,7 @@ - (void)captureOutput:(AVCapturePhotoOutput *)output
   UIImage *image = [UIImage imageWithCGImage:[UIImage imageWithData:data].CGImage
                                        scale:1.0
                                  orientation:[self getImageRotation]];
+    
   // TODO(sigurdm): Consider writing file asynchronously.
   bool success = [UIImageJPEGRepresentation(image, 1.0) writeToFile:_path atomically:YES];
   if (!success) {
@@ -85,6 +86,26 @@ - (void)captureOutput:(AVCapturePhotoOutput *)output
   _result(_path);
 }
 
+- (void)captureOutput:(AVCapturePhotoOutput *)output
+didFinishProcessingPhoto:(AVCapturePhoto *)photo
+                error:(NSError *)error  API_AVAILABLE(ios(11.0)){
+    selfReference = nil;
+    if (error) {
+      _result(getFlutterError(error));
+      return;
+    }
+    
+    NSData * photoData = [photo fileDataRepresentation];
+    
+    bool success = [photoData writeToFile:_path atomically:YES];
+    if (!success) {
+        _result([FlutterError errorWithCode:@"IOError" message:@"Unable to write file" details: nil]);
+        return;
+    }
+    _result(_path);
+    
+}
+
 - (UIImageOrientation)getImageRotation {
   float const threshold = 45.0;
   BOOL (^isNearValue)(float value1, float value2) = ^BOOL(float value1, float value2) {

packages/camera/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: 0.6.0
+version: 0.6.1
 homepage: https://github.com/flutter/plugins/tree/master/packages/camera/camera
 
 dependencies: