Re: Saving an NSDocument safely

FROM : Adam R. Maxwell
DATE : Fri Jan 11 17:24:45 2008

On Jan 11, 2008, at 6:57 AM, Alastair Houghton wrote:

> On 11 Jan 2008, at 10:47, Thomas Thiriez wrote:
>

>> I have an NSDocument, and in order to save it, I override the method:
>> -
>> saveToURL:ofType:forSaveOperation:delegate:didSaveSelector:contextInfo
>> :
>>
>> In order not to lose the original file until I am sure saving was
>> completed properly, I save in a temporary file, and when this is 
>> done,
>> I delete the original file, and rename my temporary file.

>
> Aren't you re-inventing the wheel here?  Doesn't the framework 
> already do this?


Yes, the framework does this in -[NSDocument writeSafelyToURL:..]. 
Using FSExchangeObjects doesn't result in the problem the OP mentions, 
but the temp file and destination file have to reside on the same 
volume.  I had to write my own implementation of writeSafelyToURL: 
yesterday since 10.5's safe saving is broken.

--
adam