sqlite – 如何在swift中捆绑预先填充的数据库

我有一个旧的数据库.db,超过60k行三列,我想用FMDB包装器带到我的swift SQLite应用程序,该应用程序在iPhone中工作,我试图将contacts.db拖到应用程序但我无法访问它.在设备中运行时,应用程序始终启动新数据库.

我将数据库复制到支持文件文件夹,并尝试在app文件夹中,无法访问

有没有人这样做并愿意告诉我该怎么做？

总之,我正在寻找的是将我的contacts.db插入应用程序(包),以便我可以访问设备而不是在模拟器中.我不需要在设备中添加删除或编辑contact.db,数据库加载了所需的所有信息,用户只能进行搜索并能够显示结果.

class ViewController: UIViewController {

@IBOutlet weak var name: UITextField!
@IBOutlet weak var address: UITextField!

var databasePath = NSString()    

override func viewDidLoad() {
    super.viewDidLoad()

    if let resourceUrl = NSBundle.mainBundle().URLForResource("contacts",withExtension: "db") {
        if NSFileManager.defaultManager().fileExistsAtPath(resourceUrl.path!) 
    }
    let filemgr = NSFileManager.defaultManager()
    let dirPaths =
    NSSearchPathForDirectoriesInDomains(.DocumentDirectory,.UserDomainMask,true)

    let docsDir = dirPaths[0] as! String

    databasePath = docsDir.stringByAppendingPathComponent(
                    "contacts.db")

    if !filemgr.fileExistsAtPath(databasePath as String) {

        let contactDB = FMDatabase(path: databasePath as String)

        if contactDB == nil {
            println("Error: (contactDB.lastErrorMessage())")
        }

        if contactDB.open() {
            let sql_stmt = "CREATE TABLE IF NOT EXISTS CONTACTS (ID INTEGER PRIMARY KEY AUTOINCREMENT,NAME TEXT,ADDRESS TEXT,PHONE TEXT)"
            if !contactDB.executeStatements(sql_stmt) {
                println("Error: (contactDB.lastErrorMessage())")
            }
            contactDB.close()
        } else {
            println("Error: (contactDB.lastErrorMessage())")
        }
    }

}

一些假设：

>您已正确地将libsqlite3.tbd添加到项目中.
>您已正确地向项目添加了sqlite数据库.
>您已将所需的FMDB文件正确复制到项目中.
>你有一个名为ViewController.swift的ViewController

在Xcode中打开ViewController.swift文件并找到以下代码：

override func viewDidLoad() {
     super.viewDidLoad()
     // Do any additional setup after loading the view,typically from a nib.

在评论下方添加以下代码,请记住在第4行和第4行中更改数据库的名称. 5.

// Start of Database copy from Bundle to App Document Directory
     let fileManager = NSFileManager.defaultManager()
     let documentsPath = NSURL(fileURLWithPath: NSSearchPathForDirectoriesInDomains(.DocumentDirectory,true)[0])
     let destinationSqliteURL = documentsPath.URLByAppendingPathComponent("sqlite.db")
     let sourceSqliteURL = NSBundle.mainBundle().URLForResource("sqlite",withExtension: "db")

     if !fileManager.fileExistsAtPath(destinationSqliteURL.path!) {
         // var error:NSError? = nil
         do {
             try fileManager.copyItemAtURL(sourceSqliteURL!,toURL: destinationSqliteURL)
             print("Copied")
             print(destinationSqliteURL.path)
         } catch let error as NSError {
             print("Unable to create database (error.debugDescription)")
         }
     }


     // Let's print the path to the database on your Mac
     // so you can go look for the database in the Finder.
     print(documentsPath)

     let db = FMDatabase(path: destinationSqliteURL.path)

    // Let's open the database
    if !db.open() {
        print("Unable to open database")
        return
    }

    // Let's run some SQL from the FMDB documents to make sure
    // everything is working as expected.  
    if !db.executeUpdate("create table test(x text,y text,z text)",withArgumentsInArray: nil) {
        print("create table failed: (db.lastErrorMessage())")
    }

    if !db.executeUpdate("insert into test (x,y,z) values (?,?,?)",withArgumentsInArray: ["a","b","c"]) {
        print("insert 1 table failed: (db.lastErrorMessage())")
    }

    if !db.executeUpdate("insert into test (x,withArgumentsInArray: ["e","f","g"]) {
        print("insert 2 table failed: (db.lastErrorMessage())")
    }

    if let rs = db.executeQuery("select x,z from test",withArgumentsInArray: nil) {
        while rs.next() {
            let x = rs.stringForColumn("x")
            let y = rs.stringForColumn("y")
            let z = rs.stringForColumn("z")
            print("x = (x); y = (y); z = (z)")
        }
    } else {
        print("select failed: (db.lastErrorMessage())")
    }

    db.close()

您应该能够立即运行项目并复制数据库.

以前的答案,如果它有助于某人

documentation for FMDB对此主题非常有帮助.使用那里的示例,下面的代码应该假设以下事项：

>您正在使用Swift 1.2或更高版本.
>您已将FMDB正确添加到项目中.
>一个名为contacts.db的SQLite数据库已正确添加到项目中.
>在构建阶段,然后链接二进制文件库,您已添加libsqlite3.dylib.

//
//  ViewController.swift
//

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var name: UITextField!
    @IBOutlet weak var address: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view,typically from a nib.
        let filemgr = NSFileManager.defaultManager()
        let documentsFolder = NSSearchPathForDirectoriesInDomains(.DocumentDirectory,true)[0] as! String
        let path = documentsFolder.stringByAppendingPathComponent("contacts.db")
        let database = FMDatabase(path: path)

        if !database.open() {
            println("Unable to open database")
            return
        }

        if !database.executeUpdate("create table test(x text,withArgumentsInArray: nil) {
            println("create table failed: (database.lastErrorMessage())")
        }

        if !database.executeUpdate("insert into test (x,"c"]) {
            println("insert 1 table failed: (database.lastErrorMessage())")
        }

        if !database.executeUpdate("insert into test (x,"g"]) {
            println("insert 2 table failed: (database.lastErrorMessage())")
        }

        if let rs = database.executeQuery("select x,withArgumentsInArray: nil) {
            while rs.next() {
                let x = rs.stringForColumn("x")
                let y = rs.stringForColumn("y")
                let z = rs.stringForColumn("z")
                println("x = (x); y = (y); z = (z)")
            }
        } else {
            println("select failed: (database.lastErrorMessage())")
        }

        database.close()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

要测试,只需使用Build and Run按钮,您应该看到在Xcode的控制台中运行模拟器和以下结果：

x = a; y = b; z = c
x = e; y = f; z = g

要显示控制台,请键入Shift CMD R或转到视图 – >调试区域 – >激活控制台

（编辑：李大同）

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