[ios_platform_images] Switch to loadImage (flutter#8216)

Replaces the deprecated `loadBuffer` override with the newer `loadImage`, removing the need to use the deprecated `DecoderBufferCallback` class.

This is largely a no-op because the difference between `DecoderBufferCallback` and `ImageDecoderCallback` is entirely in optional parameters the package doesn't use.

Fixes flutter/flutter#143880

Author: stuartmorgan-g

packages/ios_platform_images/CHANGELOG.md

@@ -1,5 +1,6 @@
-## NEXT
+## 0.2.4+2
 
+* Replaces usage of deprecated `loadBuffer`.
 * Updates minimum supported SDK version to Flutter 3.22/Dart 3.4.
 
 ## 0.2.4+1

packages/ios_platform_images/lib/ios_platform_images.dart

@@ -69,9 +69,9 @@ class _FutureMemoryImage extends ImageProvider<_FutureMemoryImage> {
   }
 
   @override
-  ImageStreamCompleter loadBuffer(
+  ImageStreamCompleter loadImage(
     _FutureMemoryImage key,
-    DecoderBufferCallback decode,
+    ImageDecoderCallback decode,
   ) {
     return _FutureImageStreamCompleter(
       codec: _loadAsync(key, decode),
@@ -81,7 +81,7 @@ class _FutureMemoryImage extends ImageProvider<_FutureMemoryImage> {
 
   Future<ui.Codec> _loadAsync(
     _FutureMemoryImage key,
-    DecoderBufferCallback decode,
+    ImageDecoderCallback decode,
   ) {
     assert(key == this);
     return _futureBytes.then(ui.ImmutableBuffer.fromUint8List).then(decode);

packages/ios_platform_images/pubspec.yaml

@@ -2,7 +2,7 @@ name: ios_platform_images
 description: A plugin to share images between Flutter and iOS in add-to-app setups.
 repository: https://github.com/flutter/packages/tree/main/packages/ios_platform_images
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+ios_platform_images%22
-version: 0.2.4+1
+version: 0.2.4+2
 
 environment:
   sdk: ^3.4.0