Instance Method


Starts downloading (if necessary) the specified item to the local system.


- (BOOL)startDownloadingUbiquitousItemAtURL:(NSURL *)url error:(NSError * _Nullable *)error;



Specify the URL for the file or directory in the cloud that you want to download.


On input, a pointer to variable for an NSError object. If an error occurs, this pointer is set to an NSError object containing information about the error. You may specify nil to ignore the error information.

Return Value

YES if the download started successfully or was not necessary, otherwise NO. If NO is returned and errorOut is not nil, an NSError object describing the error is returned in that parameter.


If a cloud-based file or directory has not been downloaded yet, calling this method starts the download process. If the item exists locally, calling this method synchronizes the local copy with the version in the cloud.

For a given URL, you can determine if a file is downloaded by getting the value of the NSMetadataUbiquitousItemDownloadingStatusKey key. You can also use related keys to determine the current progress in downloading the file.

See Also

Related Symbols

- setUbiquitous:itemAtURL:destinationURL:error:

Sets whether the item at the specified URL should be stored in the cloud.