IKSaveOptions saving images error when app is sandboxed

good morning!

save images in app using imagekit iksaveoptions present save panel accessory view deals different image settings.


if in save panel user select existing file, appears alert box "“xxx” exists. want replace it?".
if user press "replace" button, old file should replaced (overwritten) new one

works fine when app not sandboxed.
however, started use lion's sandbox "read/write access" entitlement. old file can not replaced correctly. old file kept , new file created. , new file name 'xxx.jpg.sb-g5evhc'. think kind of sandbox format file. not want. want replace old image file new one.

tried again: old image file can correctly replaced if app not sandboxed, can not replaced if app sandboxed.

please help! appriciated.



used sample code of 'ikimageviewdemo' can found on webpage
http://developer.apple.com/library/.../dts10004049-controller_m-dontlinkelementid_4
, code below:
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code:

 - (void)savepaneldidend: (nssavepanel *)sheet               returncode: (int)returncode              contextinfo: (void *)contextinfo  {      // save image            if (returncode == nsokbutton)      {          nsstring * path = [sheet filename];          nsstring * newuttype = [_saveoptions imageuttype];          cgimageref image;                // current image image view          image = [_imageview image];                    if (image)          {              // use imageio save image in user specified format              nsurl *               url = [nsurl fileurlwithpath: path];              cgimagedestinationref dest = cgimagedestinationcreatewithurl((cfurlref)url, (cfstringref)newuttype, 1, null);                            if (dest)              {                  cgimagedestinationaddimage(dest, image, (cfdictionaryref)[_saveoptions imageproperties]);                  cgimagedestinationfinalize(dest);                  cfrelease(dest);              }          } else          {              nslog(@"*** saveimagetopath - no image");          }      }  }     // ---------------------------------------------------------------------------------------------------------------------  - (ibaction)saveimage: (id)sender  {      // present save panel - use iksaveoptions append imagekit accessory view save panel      nssavepanel * savepanel = [nssavepanel savepanel];            _saveoptions = [[iksaveoptions alloc] initwithimageproperties: _imageproperties                                                        imageuttype: _imageuttype];            [_saveoptions addsaveoptionsaccessoryviewtosavepanel: savepanel];            nsstring * filename = [[_window representedfilename] lastpathcomponent];            [savepanel beginsheetfordirectory: null                                   file: filename                         modalforwindow: _window                          modaldelegate: self                         didendselector: @selector(savepaneldidend:returncode:contextinfo:)                             contextinfo: null];    

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jacky

 

any 1 please?

 

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