Task<string> createAlbumAndSaveLocalIdentifier ()
{
var tcs = new TaskCompletionSource<string> ();
string collectionLocalIdentifier = null;
PHPhotoLibrary.SharedPhotoLibrary.PerformChanges(() => {
var request = PHAssetCollectionChangeRequest.CreateAssetCollection("bugTrap");
collectionLocalIdentifier = request.PlaceholderForCreatedAssetCollection.LocalIdentifier;
}, (success, error) => {
if (success && !string.IsNullOrEmpty(collectionLocalIdentifier)) {
var keychain = new Keychain<TrapAlbum> (new TrapAlbum ());
// ensure the album with that localIdentifier is
var collectionResult = PHAssetCollection.FetchAssetCollections(new [] { collectionLocalIdentifier }, null);
if (collectionResult != null) {
var collection = collectionResult.firstObject as PHAssetCollection;
if (collection != null) {
albumLocalIdentifier = collectionLocalIdentifier;
if (!tcs.TrySetResult(albumLocalIdentifier)) {
var ex = new Exception ("createAlbumAndSaveLocalIdentifier Failed");
tcs.TrySetException(ex);
// Log.Error(ex);
}
keychain.StoreKeyValues(new Dictionary<DataKeys, string> {
{ DataKeys.LocalIdentifier, albumLocalIdentifier }
});
}
} else {
var ex = new Exception ("createAlbumAndSaveLocalIdentifier Failed");
tcs.TrySetException(ex);
// Log.Error(ex);
}
} else {
var ex = new Exception ("createAlbumAndSaveLocalIdentifier Failed");
tcs.TrySetException(ex);
// Log.Error(ex);
}
});
return tcs.Task;
}