Swift已连接到SQLite数据库,但我找不到该文件

here (开始使用SQLite)。 因此,我的代码基本相同:

import Foundation
import UIKit
import Alamofire
import SwiftyJSON
import SQLite.Swift
import PlaygroundSupport

enum SQLiteError: Error {
    case OpenDatabase(message: String)
    case Prepare(message: String)
    case Step(message: String)
    case Bind(message: String)
}

class SQLiteDatabase {
    fileprivate let dbPointer: OpaquePointer?

    fileprivate init(dbPointer: OpaquePointer?) {
        self.dbPointer = dbPointer
    }

    deinit {
        sqlite3_close(dbPointer)
    }

    static func open(path: String) throws -> SQLiteDatabase {
        var db: OpaquePointer? = nil
        // 1
        if sqlite3_open(path, &db) == SQLITE_OK {
            // 2
            return SQLiteDatabase(dbPointer: db)
        } else {
            // 3
            defer {
                if db != nil {
                    sqlite3_close(db)
                }
            }

            if let errorPointer = sqlite3_errmsg(db) {
                let message = String.init(cString: errorPointer)
                throw SQLiteError.OpenDatabase(message: message)
            } else {
                throw SQLiteError.OpenDatabase(message: "No error message provided from sqlite.")
            }
        }
    }
}

let db: SQLiteDatabase

do {
    db = try SQLiteDatabase.open(path: "")
    print("Successfully opened connection to database.")
} catch SQLiteError.OpenDatabase(_) {
    print("Unable to open database. Verify that you created the directory described in the Getting Started section.")
    PlaygroundPage.current.finishExecution()
}

问题是斯威夫特向我确认他“成功打开了与数据库的连接”。但问题是我从未为数据库创建过文件。。。我不知道在哪里可以找到真正的文件。

提前感谢您的帮助!