Sqlite

 if (sqlite3_open([[[[NSBundle mainBundle] pathForResource:@"wxs" ofType:@"db"] retain] fileSystemRepresentation], &database)==SQLITE_OK) { 
        NSLog(@"open sqlite db ok."); 
        }
    ///
    const char *selectSql="select * from t1"; 
    sqlite3_stmt *statement; 
    if (sqlite3_prepare_v2(database, selectSql, -1, &statement, nil)==SQLITE_OK) { 
        NSLog(@"select ok."); 
    }
    while (sqlite3_step(statement)==SQLITE_ROW) 
    { 
        int _lat=sqlite3_column_int(statement, 0); 
        int _lng=sqlite3_column_int(statement, 1); 
        NSLog(@"lat %i, lng %i",_lat,_lng); 
    }
    sqlite3_finalize(statement);