检查服务器上的sqlite user_version以更新iOS应用程序

I have this code:

我有这段代码:

-(int)queryUserVersion: (sqlite3*) db {
    // get current database version of schema
    static sqlite3_stmt *stmt_version;


   if(sqlite3_prepare_v2(db, "PRAGMA user_version;", -1, &stmt_version, NULL) == SQLITE_OK) {
        while(sqlite3_step(stmt_version) == SQLITE_ROW) {
            databaseVersion = sqlite3_column_int(stmt_version, 0);
            NSLog(@"%s: version %d", __FUNCTION__, databaseVersion);
        }
        NSLog(@"%s: the databaseVersion is: %d", __FUNCTION__, databaseVersion);
    } else {
        NSLog(@"%s: ERROR Preparing: , %s", __FUNCTION__, sqlite3_errmsg(db) );
    }
    sqlite3_finalize(stmt_version);

    return databaseVersion;
}
-(int)queryUserVe