Does iOS Sqlite database get locked in simultaneous background and foreground operation?

I am making iOS app which is having both background and foreground database operations. I am getting 'Database locked' exception. The one most common scenario is -when my app inserting/updating/fetching data from database in background at same time if I am fetching data from database in foreground database gets locked. I am using raw sqlite queries.

• I have made one common class for Database operation, do I need to make it singleton class?


• Does such type of operation are done using sqlite in iOS?


• I have read about THREAD_SAFE for sqlite, but not getting how to do THREAD_SAFE.

Any other approach is also appreciated..