Turn on editing fields for collections

Question

created the following collection(TEST_EMP), had no problems to delete rows. But if I turn on any editing fields ( eg. ename,com by changing the field to TEXT under report column), I will always get the error msg: "invalid number" when attempt to delete any row .
Can you help ?
Following is my process for creating collection, delete row and query on creating report screen with check box
Thanks
Zeng
--create the collection
if apex_collection.collection_exists(p_collection_name => 'TEST_EMP')
then apex_collection.delete_collection (p_collection_name => 'TEST_EMP');
end if;
-- create new collection
apex_collection.create_collection_from_query (p_collection_name => 'TEST_EMP',
p_query => 'select EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO from test_emp
order by empno' );
-- show edit screen
select
APEX_ITEM.CHECKBOX(1,seq_id) SEQ_ID,
seq_id as seq_id_display
,C001 empno
,c002 ename
,c003 job
,c004 manager
,to_date(c005,'DD-MON-YY') hiredate
,c006 SAl
,c007 com
,c008 dept
from apex_collections
where collection_name='TEST_EMP'
and C008='20'
order by c001
------- delete selected row
FOR r in 1..APEX_APPLICATION.G_F01.COUNT
LOOP
apex_collection.delete_member
(p_collection_name =>'TEST_EMP',p_seq => apex_application.G_F01(r));
end loop;

Answer 1

You need to call 'becomeFirstResponder' on the text field. Typically done in your view controller's 'viewWillAppear' method.