[英]iOS8 PhotoKit, some albums can't be finded
当我使用PhotoKit创建我的专辑时,我的项目中没有所有专辑,从计算机导入的某些专辑无法搜索。我将发布我的代码。
//get system albums
PHImageRequestOptions * options = [[PHImageRequestOptions alloc] init];
options.networkAccessAllowed = YES;
options.synchronous = YES;
KVPhotoAlbum * userAlum = nil;
PHCachingImageManager * manager = [[PHCachingImageManager alloc] init];
PHFetchResult * systemAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
for (id object in systemAlbums) {
if ([object isKindOfClass:[PHAssetCollection class]]) {
PHAssetCollection * collection = (PHAssetCollection*)object;
if (collection.assetCollectionSubtype == PHAssetCollectionSubtypeSmartAlbumVideos) {
continue;
}
//get photo
PHFetchResult * imageResults = [PHAsset fetchAssetsInAssetCollection:collection options:nil];
if (imageResults.count) {
KVPhotoAlbum * album = [[KVPhotoAlbum alloc] init];
album.collection = collection;
album.title = [collection valueForKey:@"localizedTitle"];
album.photoCount = imageResults.count;
if (collection.assetCollectionSubtype == PHAssetCollectionSubtypeSmartAlbumUserLibrary) {
//camera
userAlum = album;
}else {
[_albums addObject:album];
}
PHAsset * asset = [imageResults lastObject];
[manager requestImageForAsset:asset targetSize:CGSizeMake(60, 60) contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
album.image = result;
}];
}
}
}
//get albums created by user
PHFetchResult * customAlbums = [PHCollectionList fetchTopLevelUserCollectionsWithOptions:nil];
for (id object in customAlbums) {
if ([object isKindOfClass:[PHAssetCollection class]]) {
PHAssetCollection * collection = (PHAssetCollection*)object;
if (collection.assetCollectionSubtype == PHAssetCollectionSubtypeSmartAlbumVideos) {
continue;
}
//get photo
PHFetchResult * imageResults = [PHAsset fetchAssetsInAssetCollection:collection options:nil];
if (imageResults.count) {
KVPhotoAlbum * album = [[KVPhotoAlbum alloc] init];
album.collection = collection;
album.title = [collection valueForKey:@"localizedTitle"];
album.photoCount = imageResults.count;
[_albums addObject:album];
PHAsset * asset = [imageResults lastObject];
[manager requestImageForAsset:asset targetSize:CGSizeMake(60, 60) contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
album.image = result;
}];
}
}
}
代码太多,我必须添加更多细节。
我自己解决了,现在我指明了方向。 有一个专辑类型,“PHAssetCollectionTypeAlbum”,这可以搜索从计算机导入的这些专辑。
PHFetchResult * importAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:nil];
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