ObjecTips

Swift & Objective-C で iOS とか macOS とか

フォトライブラリへの画像保存メソッド まとめ

Objective-C APIまとめ PHAssetChangeRequest PHPhotoLibrary ALAsset ALAssetsLibrary UIImagePickerController

PHAssetChangeRequest.h (iOS 8以降)

+ (instancetype)creationRequestForAssetFromImage:(UIImage *)image;
+ (instancetype)creationRequestForAssetFromImageAtFileURL:(NSURL *)fileURL;

PHPhotoLibrary の performChanges:completionHandler: または performChangesAndWait:error: メソッドと組み合わせて使用する。


ALAsset.h

- (void)writeModifiedImageDataToSavedPhotosAlbum:(NSData *)imageData metadata:(NSDictionary *)metadata completionBlock:(ALAssetsLibraryWriteImageCompletionBlock)completionBlock __OSX_AVAILABLE_STARTING(__MAC_NA, __IPHONE_5_0);

既存アセットの内容を書き換え

- (void)setImageData:(NSData *)imageData metadata:(NSDictionary *)metadata completionBlock:(ALAssetsLibraryWriteImageCompletionBlock)completionBlock __OSX_AVAILABLE_STARTING(__MAC_NA, __IPHONE_5_0);


ALAssetsLibrary.h

- (void)writeImageToSavedPhotosAlbum:(CGImageRef)imageRef orientation:(ALAssetOrientation)orientation completionBlock:(ALAssetsLibraryWriteImageCompletionBlock)completionBlock;
- (void)writeImageToSavedPhotosAlbum:(CGImageRef)imageRef metadata:(NSDictionary *)metadata completionBlock:(ALAssetsLibraryWriteImageCompletionBlock)completionBlock __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_1);
- (void)writeImageDataToSavedPhotosAlbum:(NSData *)imageData metadata:(NSDictionary *)metadata completionBlock:(ALAssetsLibraryWriteImageCompletionBlock)completionBlock __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_1);


UIImagePickerController.h

UIKIT_EXTERN void UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);