cocoa - NSTableView Delete Row by clearing text -

i want simple table 1 string column adds new line using return key. want delete row if user clears text on particular row too.

i've managed add new line return key method:

-(bool)control:(nscontrol*)control textview:(nstextview*)textview docommandbyselector:(sel)commandselector{ if (commandselector == @selector(insertnewline:)) {     [self returnkey];     return yes; } else if(commandselector == @selector(moveup:)){     [self tablemoveup];     return yes; } else if(commandselector == @selector(movedown:)){     [self tablemovedown];     return yes; } else{     nslog(@"%@", nsstringfromselector(commandselector)); }  return no; 

}

the problem deleting row when user clears text on row , hits return key. method being called before actual changes on table saved data source. i've tried getting datacell on column this:

nstextfieldcell *cell = [self.tableview.tablecolumns[0] datacell]; nslog(@"%@",cell.stringvalue); 

but stringvalue not accurate. ideas on how achieve ? thank you!

since table column's data cell reused each row (set value , "stamp" in place when drawing, lather, rinse, repeat), odd place put kind of code. "stringvalue not accurate" observation big clue - it'll set whatever value cell last used draw, can't , shouldn't determined.

why not have data source manage it? when -tableview:setobjectvalue:fortablecolumn:row: called, check if obj empty string / nil / whatever, remove row , reload. "empty cell" user action; table view handles , lets data source (a controller) know when user committed change.

if want have "delete/backspace deletes row" customize nstextfieldcell send "mytablerowwasdeleted" notification, data source can observe , take appropriate steps end editing , remove "empty" row, reload.