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[image_picker] Fix exception when canceling pickMultipleMedia on iOS (#4761)

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Makes the Pigeon interface for the iOS implementation consistent in returning non-nullable lists, in keeping with our strong preference in this repo for collections being non-nullable whenever reasonable (to avoid the issue of having two ways of expressing the same thing), and updates the native side never to return a `nil` list.

Fixes https://github.com/flutter/flutter/issues/133111
This commit is contained in:
stuartmorgan
2023-08-23 10:56:22 -07:00
committed by GitHub
parent c0136f9c32
commit 32460c7da3
9 changed files with 49 additions and 30 deletions
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3
packages/image_picker/image_picker_ios/CHANGELOG.md
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@ -1,5 +1,6 @@
## NEXT
## 0.8.8+1
* Fixes exception when canceling pickMultipleMedia.
* Updates minimum supported SDK version to Flutter 3.7/Dart 2.19.
## 0.8.8

14
packages/image_picker/image_picker_ios/example/ios/RunnerTests/ImagePickerPluginTests.m
View File

@ -360,6 +360,20 @@
[self waitForExpectationsWithTimeout:30 handler:nil];
}
- (void)testPluginMediaPathConvertsNilToEmptyList {
FLTImagePickerPlugin *plugin = [[FLTImagePickerPlugin alloc] init];
XCTestExpectation *resultExpectation = [self expectationWithDescription:@"result"];
plugin.callContext = [[FLTImagePickerMethodCallContext alloc]
initWithResult:^(NSArray<NSString *> *_Nullable result, FlutterError *_Nullable error) {
XCTAssertEqualObjects(result, @[]);
[resultExpectation fulfill];
}];
[plugin sendCallResultWithSavedPathList:nil];
[self waitForExpectationsWithTimeout:30 handler:nil];
}
- (void)testPluginMediaPathHasItem {
FLTImagePickerPlugin *plugin = [[FLTImagePickerPlugin alloc] init];
NSArray *pathList = @[ @"test" ];

6
packages/image_picker/image_picker_ios/ios/Classes/FLTImagePickerPlugin.m
View File

@ -173,7 +173,7 @@ typedef NS_ENUM(NSInteger, ImagePickerClassType) { UIImagePickerClassType, PHPic
[self cancelInProgressCall];
FLTImagePickerMethodCallContext *context = [[FLTImagePickerMethodCallContext alloc]
initWithResult:^void(NSArray<NSString *> *paths, FlutterError *error) {
if (paths && paths.count != 1) {
if (paths.count > 1) {
completion(nil, [FlutterError errorWithCode:@"invalid_result"
message:@"Incorrect number of return paths provided"
details:nil]);
@ -246,7 +246,7 @@ typedef NS_ENUM(NSInteger, ImagePickerClassType) { UIImagePickerClassType, PHPic
(nonnull void (^)(NSString *_Nullable, FlutterError *_Nullable))completion {
FLTImagePickerMethodCallContext *context = [[FLTImagePickerMethodCallContext alloc]
initWithResult:^void(NSArray<NSString *> *paths, FlutterError *error) {
if (paths && paths.count != 1) {
if (paths.count > 1) {
completion(nil, [FlutterError errorWithCode:@"invalid_result"
message:@"Incorrect number of return paths provided"
details:nil]);
@ -687,7 +687,7 @@ typedef NS_ENUM(NSInteger, ImagePickerClassType) { UIImagePickerClassType, PHPic
message:@"pathList's items should not be null"
details:nil]);
} else {
self.callContext.result(pathList, nil);
self.callContext.result(pathList ?: [NSArray array], nil);
}
self.callContext = nil;
}

22
packages/image_picker/image_picker_ios/lib/image_picker_ios.dart
View File

@ -88,7 +88,7 @@ class ImagePickerIOS extends ImagePickerPlatform {
double? maxHeight,
int? imageQuality,
}) async {
final List<dynamic>? paths = await _pickMultiImageAsPath(
final List<dynamic> paths = await _pickMultiImageAsPath(
options: MultiImagePickerOptions(
imageOptions: ImageOptions(
maxWidth: maxWidth,
@ -97,7 +97,9 @@ class ImagePickerIOS extends ImagePickerPlatform {
),
),
);
if (paths == null) {
// Convert an empty list to a null return since that was the legacy behavior
// of this method.
if (paths.isEmpty) {
return null;
}
@ -108,15 +110,11 @@ class ImagePickerIOS extends ImagePickerPlatform {
Future<List<XFile>> getMultiImageWithOptions({
MultiImagePickerOptions options = const MultiImagePickerOptions(),
}) async {
final List<String>? paths = await _pickMultiImageAsPath(options: options);
if (paths == null) {
return <XFile>[];
}
final List<String> paths = await _pickMultiImageAsPath(options: options);
return paths.map((String path) => XFile(path)).toList();
}
Future<List<String>?> _pickMultiImageAsPath({
Future<List<String>> _pickMultiImageAsPath({
MultiImagePickerOptions options = const MultiImagePickerOptions(),
}) async {
final int? imageQuality = options.imageOptions.imageQuality;
@ -141,7 +139,7 @@ class ImagePickerIOS extends ImagePickerPlatform {
MaxSize(width: maxWidth, height: maxHeight),
imageQuality,
options.imageOptions.requestFullMetadata))
?.cast<String>();
.cast<String>();
}
Future<String?> _pickImageAsPath({
@ -272,7 +270,7 @@ class ImagePickerIOS extends ImagePickerPlatform {
double? maxHeight,
int? imageQuality,
}) async {
final List<String>? paths = await _pickMultiImageAsPath(
final List<String> paths = await _pickMultiImageAsPath(
options: MultiImagePickerOptions(
imageOptions: ImageOptions(
maxWidth: maxWidth,
@ -281,7 +279,9 @@ class ImagePickerIOS extends ImagePickerPlatform {
),
),
);
if (paths == null) {
// Convert an empty list to a null return since that was the legacy behavior
// of this method.
if (paths.isEmpty) {
return null;
}

9
packages/image_picker/image_picker_ios/lib/src/messages.g.dart
View File

@ -179,7 +179,7 @@ class ImagePickerApi {
}
}
Future<List<String?>?> pickMultiImage(MaxSize arg_maxSize,
Future<List<String?>> pickMultiImage(MaxSize arg_maxSize,
int? arg_imageQuality, bool arg_requestFullMetadata) async {
final BasicMessageChannel<Object?> channel = BasicMessageChannel<Object?>(
'dev.flutter.pigeon.ImagePickerApi.pickMultiImage', codec,
@ -198,8 +198,13 @@ class ImagePickerApi {
message: replyList[1] as String?,
details: replyList[2],
);
} else if (replyList[0] == null) {
throw PlatformException(
code: 'null-error',
message: 'Host platform returned null value for non-null return value.',
);
} else {
return (replyList[0] as List<Object?>?)?.cast<String?>();
return (replyList[0] as List<Object?>?)!.cast<String?>();
}
}

2
packages/image_picker/image_picker_ios/pigeons/messages.dart
View File

@ -54,7 +54,7 @@ abstract class ImagePickerApi {
int? imageQuality, bool requestFullMetadata);
@async
@ObjCSelector('pickMultiImageWithMaxSize:quality:fullMetadata:')
List<String>? pickMultiImage(
List<String?> pickMultiImage(
MaxSize maxSize, int? imageQuality, bool requestFullMetadata);
@async
@ObjCSelector('pickVideoWithSource:maxDuration:')

2
packages/image_picker/image_picker_ios/pubspec.yaml
View File

@ -2,7 +2,7 @@ name: image_picker_ios
description: iOS implementation of the image_picker plugin.
repository: https://github.com/flutter/packages/tree/main/packages/image_picker/image_picker_ios
issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+image_picker%22
version: 0.8.8
version: 0.8.8+1
environment:
sdk: ">=2.19.0 <4.0.0"

17
packages/image_picker/image_picker_ios/test/image_picker_ios_test.dart
View File

@ -57,7 +57,7 @@ class _ApiLogger implements TestHostImagePickerApi {
}
@override
Future<List<String?>?> pickMultiImage(
Future<List<String?>> pickMultiImage(
MaxSize maxSize,
int? imageQuality,
bool requestFullMetadata,
@ -68,7 +68,7 @@ class _ApiLogger implements TestHostImagePickerApi {
'imageQuality': imageQuality,
'requestFullMetadata': requestFullMetadata,
}));
return returnValue as List<String?>?;
return returnValue as List<String?>;
}
@override
@ -441,8 +441,8 @@ void main() {
);
});
test('handles a null image path response gracefully', () async {
log.returnValue = null;
test('returns null for an empty list', () async {
log.returnValue = <String>[];
expect(await picker.pickMultiImage(), isNull);
});
@ -883,11 +883,10 @@ void main() {
);
});
test('handles a null image path response gracefully', () async {
log.returnValue = null;
test('returns null for an empty list', () async {
log.returnValue = <String>[];
expect(await picker.getMultiImage(), isNull);
expect(await picker.getMultiImage(), isNull);
});
});
@ -1643,8 +1642,8 @@ void main() {
);
});
test('handles a null image path response gracefully', () async {
log.returnValue = null;
test('handles an empty response', () async {
log.returnValue = <String>[];
expect(await picker.getMultiImageWithOptions(), isEmpty);
});

4
packages/image_picker/image_picker_ios/test/test_api.g.dart
View File

@ -54,7 +54,7 @@ abstract class TestHostImagePickerApi {
Future<String?> pickImage(SourceSpecification source, MaxSize maxSize,
int? imageQuality, bool requestFullMetadata);
Future<List<String?>?> pickMultiImage(
Future<List<String?>> pickMultiImage(
MaxSize maxSize, int? imageQuality, bool requestFullMetadata);
Future<String?> pickVideo(
@ -117,7 +117,7 @@ abstract class TestHostImagePickerApi {
final bool? arg_requestFullMetadata = (args[2] as bool?);
assert(arg_requestFullMetadata != null,
'Argument for dev.flutter.pigeon.ImagePickerApi.pickMultiImage was null, expected non-null bool.');
final List<String?>? output = await api.pickMultiImage(
final List<String?> output = await api.pickMultiImage(
arg_maxSize!, arg_imageQuality, arg_requestFullMetadata!);
return <Object?>[output];
});