iOS8 PhotoKit，有些相册找不到答案

【问题标题】：iOS8 PhotoKit, some albums can't be findediOS8 PhotoKit，有些相册找不到
【发布时间】：2017-01-04 03:10:13
【问题描述】：

当我使用PhotoKit创建我的相册时，我的项目中没有所有相册，一些从电脑导入的相册无法搜索。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，我要补充更多细节。

【问题讨论】：

有谁知道如何解决这个问题？
你好，有人知道吗？

标签： ios objective-c photokit

【解决方案1】：

我自己解决了，现在我指路。有一个相册类型“PHAssetCollectionTypeAlbum”，可以搜索这些从电脑导入的相册。

PHFetchResult * importAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:nil];

【讨论】：