cocoa - Create dynamic columns on NSTableView on reload -

i'm creating nstableview , have problem change tablecolumns. header appear black on terminate reload of data.

for (int = 0; < sqlite3_column_count(stmp); i++) {     nstablecolumn *tablecolumn = [nstablecolumn new];     nsstring *columnname = [nsstring stringwithutf8string:sqlite3_column_name(stmp, i)];      [tablecolumn setidentifier:columnname];     nscell *cell = [[nscell alloc] inittextcell:columnname];     [cell setfont:[nsfont boldsystemfontofsize:[nsfont smallsystemfontsize]]];     [tablecolumn setheadercell:cell];     [tableview addtablecolumn:tablecolumn]; } 

how reloading header without lost style?

edit 1

for (int = 0; < sqlite3_column_count(stmp); i++) {     nstablecolumn *tablecolumn = [nstablecolumn new];     nsstring *columnname = [nsstring stringwithutf8string:sqlite3_column_name(stmp, i)];      [tablecolumn setidentifier:columnname];      nstextfieldcell *cell = [[nstextfieldcell alloc] inittextcell:columnname];      [cell settextcolor:[nscolor whitecolor]];     [tablecolumn setheadercell:cell];      [self.tableview addtablecolumn:tablecolumn]; } 

this code appear name of columns in header not same initial style of header in nstableview.

i'm copy header style temporary variable on initialize xib

...  [self copycolumnconfiguration:columntemplate fromcolumn:self.tableview.tablecolumns[0]]; ...  - (void)copycolumnconfiguration:(nstablecolumn*)dstcolumn fromcolumn: (nstablecolumn*)srccolumn {     id srccell;     id dstcell;      srccell = [srccolumn datacell];     dstcell = [dstcolumn datacell];     [dstcell setalignment:[srccell alignment]];     [dstcell setformatter:[srccell formatter]];      srccell = [srccolumn headercell];     dstcell = [dstcolumn headercell];     [dstcell setalignment:[srccell alignment]]; } 

and after create column copy new column style stored. more information see http://lists.apple.com/archives/cocoa-dev/2005/nov/msg00949.html