我使用下面的代码 来更新查询 使用sqlite。
但是我越来越"database is locked error"。
我尝试搜索一些SO链接，建议关闭数据库，但是我再次遇到相同的错误。我已经提到我在代码中出现错误的地方。

const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
    NSString *locationNo =NULL;
    NSString *querySQL = [NSString stringWithFormat:@"select count(*) from code"];
    const char *query_stmt = [querySQL UTF8String];

    if (sqlite3_prepare_v2(database,query_stmt, -1, &statement, NULL) == SQLITE_OK)
    {
        if (sqlite3_step(statement) == SQLITE_ROW)
        {
            locationNo = [[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)];
            int count= [locationNo intValue];
            sqlite3_close(database);
            NSLog(@"%@",locationNo);
            if(0==count)
            {
                NSString *insertSQL = [NSString stringWithFormat:@"insert into favourite_code (code_id,code_1,code_2,code_3,code_4,code_5,code_6, status, record_status) VALUES (\"%d\",\"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\")",1 ,code1,code2,code3,code4,code5,code6,@"Y", @"Y"];

                const char *insert_stmt = [insertSQL UTF8String];
                sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL);
                if (sqlite3_step(statement) == SQLITE_DONE)
                {
                    return YES;
                }
                else {
                    return NO;
                }
                sqlite3_reset(statement);
                sqlite3_close(database);
            }
            else{


                =========================== Getting Error in the below lines =========================

                const char *sq1l = "update code SET code_1=?, code_2=?, code_3=?, code_4=?, code_5=?,code_6=? WHERE code_id=1";

                if (sqlite3_prepare_v2(database, sq1l, -1, &statement, NULL) != SQLITE_OK)
                {
                    NSLog(@"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
                }
                else
                {
                    sqlite3_bind_text(statement, 1, [code1 UTF8String], -1, SQLITE_TRANSIENT);
                    sqlite3_bind_text(statement, 2, [code1 UTF8String], -1, SQLITE_TRANSIENT);
                    sqlite3_bind_text(statement, 3, [code1 UTF8String], -1, SQLITE_TRANSIENT);
                    sqlite3_bind_text(statement, 4, [code1 UTF8String], -1, SQLITE_TRANSIENT);
                    sqlite3_bind_text(statement, 5, [code1 UTF8String], -1, SQLITE_TRANSIENT);
                    sqlite3_bind_text(statement, 6, [code1 UTF8String], -1, SQLITE_TRANSIENT);

                }

                int success = sqlite3_step(statement);
                if (success != SQLITE_DONE)
                {
                    NSLog(@"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
                    //result = FALSE;
                }
                else
                {
                    NSLog(@"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
                    //result = TRUE;
                }

                =================================END=========================================


            }

            sqlite3_reset(statement);
        }
        else
        {
            NSLog(@"Not found");
            locationNo=@"1";
        }
        sqlite3_reset(statement);
    }
}