Best way to get the ID of the last inserted row on SQLite

The function sqlite3_last_insert_rowid() is what you're looking for. Having just checked out the source code for FMDB, there seems to be a method on FMDatabase called -lastInsertRowId that wraps the function.

For swift 4 use this code

let lastRowId = sqlite3_last_insert_rowid(db)

for example

if sqlite3_exec(db, stringSql, nil, nil, nil) != SQLITE_OK {
    let errmsg = String(cString: sqlite3_errmsg(db)!)
    print("error Insert: \(errmsg)")
}

let lastRowId = sqlite3_last_insert_rowid(db);
print(lastRowId) // its gives you last insert id

if sqlite3_finalize(statement) != SQLITE_OK {
    let errmsg = String(cString: sqlite3_errmsg(db)!)
    print("error finalizing prepared statement: \(errmsg)")
}
statement = nil

//*** close data base
if sqlite3_close(db) != SQLITE_OK {
    print("error closing database")
}
db = nil

Try the following:

var rowid: Int = Int(contactDB.lastInsertRowId())

If you can guarantee that your ID column is an auto-increment column, MAX(ID) is fine.

But to cover any case, there's a specialized SQLite function called LAST_INSERT_ROWID():

SELECT LAST_INSERT_ROWID();

In FMDB, you use the -lastInsertRowId method (which internally runs the above):

int lastId = [fmdb lastInsertRowId];