iOS中sqlite版本号

https://github.com/yapstudios/YapDatabase/wiki/SQLite-version-(bundled-with-OS)
https://github.com/yapstudios/YapDatabase/blob/master/YapDatabase/YapDatabase.m
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+ (NSString *)sqliteVersionUsing:(sqlite3 *)aDb
{
    sqlite3_stmt *statement;

    int status = sqlite3_prepare_v2(aDb, "SELECT sqlite_version();", -1, &statement, NULL);
    if (status != SQLITE_OK)
    {
        YDBLogError(@"%@: Error creating statement! %d %s", THIS_METHOD, status, sqlite3_errmsg(aDb));
        return nil;
    }

    NSString *version = nil;

    status = sqlite3_step(statement);
    if (status == SQLITE_ROW)
    {
        const unsigned char *text = sqlite3_column_text(statement, SQLITE_COLUMN_START);
        int textSize = sqlite3_column_bytes(statement, SQLITE_COLUMN_START);

        version = [[NSString alloc] initWithBytes:text length:textSize encoding:NSUTF8StringEncoding];
    }
    else
    {
        YDBLogError(@"%@: Error executing statement! %d %s", THIS_METHOD, status, sqlite3_errmsg(aDb));
    }

    sqlite3_finalize(statement);
    statement = NULL;

    return version;
}