Locking annotation added to PDF documents

Dear Nermeen,
How the same thing is achieve in IOS? can you guide me?

Dear Nermeen,
How the same thing is achieve in IOS? can you guide me with sample code?
Waiting for your quick response.

Thanks
Ponlingam S

Dear Ponlingam S,
Now in RadaeePDF iOS's SDK you could manage annots readonly or locked just setting true the global boolean g_annot_readonly and g_annot_lock.
Using it the SDK manage automatically readonly and locked annotations.
You could also see an example here .