Without seeing your code it is hard to provide an answer. If the enabling works your probably did not set the string property of your buttons.
One possible solution might look like this:
handles.f=figure('Position',[200 200 800 800]);
for i=1:3
for k=1:3
handles.pb(i,k)=uicontrol('parent',handles.f,'style','pushbutton','Position',[i*200-200 k*200-200 200 200],'String',num2str(i));
end
end
set(handles.pb(:,:),'Callback',{@tictac_cb,handles});
handles.flag='X';
handles.newgame=uicontrol('style','pushbutton','position',[100 700 100 40],'String','New Game','Callback',{@newgame_cb,handles});
guidata(handles.f,handles)
function tictac_cb(hObj,~,handles)
handles=guidata(handles.f);
set(hObj,'String',handles.flag);
set(hObj,'Enable','Off')
if strcmp(handles.flag,'X')
handles.flag='O';
else
handles.flag='X';
end
guidata(handles.pb(1,1),handles)
end
function newgame_cb(~,~,handles)
set(handles.pb(:,:),'Enable','On');
set(handles.pb(:,:),'String','');
end
