如何从我的照片stream专辑中获取照片
我想从我的照片stream中获取照片。 我只有PHAsset的localIdentifier。
对于“我的照片stream”专辑以外的照片，我正在使用以下代码检索PHAsset。
[PHAsset fetchAssetsWithLocalIdentifiers:@[“localIdentifier”] options:nil].firstObject localIdentifier就像是“ 1BFC3BA2-AC95-403A-B4FF-B26AFB631581/L0/001 ”
它工作正常。 但是在我的“我的照片stream”相册中，我获得了PHAsset的零值。
有没有人有一个想法如何我们可以从我的照片stream使用PHAsset的localIdentifier值原始照片？
我自己得到了答案。 我检索所有的照片stream照片，并与特定的localIdentifier进行比较。 以下是我的代码。
PHFetchOptions *userAlbumsOptions = [PHFetchOptions new]; userAlbumsOptions.predicate = [NSPredicate predicateWithFormat:@"estimatedAssetCount > 0"]; PHFetchResult *userAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumMyPhotoStream options:userAlbumsOptions]; [userAlbums enumerateObjectsUsingBlock:^(PHAssetCollection *collection, NSUInteger idx1, BOOL *stop) { NSLog(@"album title %@", collection.localizedTitle); PHFetchOptions *fetchOptions = [PHFetchOptions new]; fetchOptions.predicate = [NSPredicate predicateWithFormat:@"self.localIdentifier CONTAINS [cd] 'my identifier value'"]; PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:collection options:fetchOptions]; [assetsFetchResult enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop1) { [[PHImageManager defaultManager] requestImageDataForAsset:asset options:option resultHandler:^(NSData * _Nullable imageData, NSString * _Nullable dataUTI, UIImageOrientation orientation, NSDictionary * _Nullable info) { UIImage *imgResult = [UIImage imageWithData:imageData scale:1]; }]; }]; }]
请使用此链接http://qiita.com/to_obara/items/e386040abcc93842745b获取swift代码。 我已经按照上面的链接写了下面的目标c代码。
PHAsset *phAsset; PHFetchOptions *optionsForFetch = [[PHFetchOptions alloc] init];; optionsForFetch.includeHiddenAssets = YES; NSURL *alURL = [info valueForKey: UIImagePickerControllerReferenceURL]; PHFetchResult *fetchResult = [PHAsset fetchAssetsWithALAssetURLs: @[alURL] options: nil]; if (fetchResult.count > 0) { return; } NSString *str = alURL.absoluteString; NSString *localIDFragment = [[[[str componentsSeparatedByString: @"="] objectAtIndex: 1] componentsSeparatedByString: @"&"] objectAtIndex: 0]; PHFetchResult *fetchResultForPhotostream = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumMyPhotoStream options: nil]; if (fetchResultForPhotostream.count > 0) { PHAssetCollection *photostream = fetchResultForPhotostream [0]; PHFetchResult *fetchResultForPhotostreamAssets = [PHAsset fetchAssetsInAssetCollection:photostream options:optionsForFetch]; if (fetchResultForPhotostreamAssets.count > 0) { NSIndexSet *i = [NSIndexSet indexSetWithIndexesInRange: NSMakeRange(0, fetchResultForPhotostreamAssets.count)]; //let i=NSIndexSet(indexesInRange: NSRange(location: 0,length: fetchResultForPhotostreamAssets.count)) [fetchResultForPhotostreamAssets enumerateObjectsAtIndexes: i options: NSEnumerationReverse usingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { PHAsset *target = obj; NSString *identifier = target.localIdentifier; if ([identifier rangeOfString: localIDFragment].length != 0) { if (target) { // get photo info from this asset PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init]; imageRequestOptions.synchronous = YES; [[PHImageManager defaultManager] requestImageDataForAsset:target options:imageRequestOptions resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) { if ([info objectForKey:@"PHImageFileURLKey"]) { // path looks like this - // file:///var/mobile/Media/DCIM/###APPLE/IMG_####.JPG NSURL *path = [info objectForKey:@"PHImageFileURLKey"]; selectedImageName = path.absoluteString; [imagesDictArray addObject: [@{@"image": tempImage, @"imageUrl": selectedImageName} mutableCopy]]; } }]; } // } }]; } }