Swift - 從premade sqlite文件填充核心數據

Question

與here不一樣的問題。

我有一個預製的sqlite文件，它有三列：chapter，verseNumber和verseText。我的核心數據實體的屬性名稱相同。如何從我的sqlite文件填充核心數據庫？

Answer 1

這裏是我落得這樣做：

@IBAction func getSQLDB (sender: NSButton) { 

    let documentsFolder = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String 
    let path = documentsFolder.stringByAppendingPathComponent("kjv.db") 

    println(documentsFolder) 

    let database = FMDatabase(path: path) 

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

    //if let rs = database.executeQuery("SELECT * FROM bible WHERE (book = 'Gen') AND (chapter = '1')", withArgumentsInArray: nil) { 
    if let rs = database.executeQuery("SELECT * FROM bible WHERE (book = 'Genesis') OR (book = 'Exodus')", withArgumentsInArray: nil) { 
     while rs.next() { 
      let content = rs.stringForColumn("content") 
      let verseNumber: Int! = rs.stringForColumn("verse").toInt() 
      let chapter: Int! = rs.stringForColumn("chapter").toInt() 
      let name = rs.stringForColumn("book") 
      // Loops through all the information from the query and creates a book 
      makeBook(name, content: content, chapter: chapter, verseNumber: verseNumber) 
     } 
    } else { 
     println("select failed: \(database.lastErrorMessage())") 
    } 

    database.close() 

} 

Answer 2

Core Data無法讀取任意SQLite文件。您將不得不手動將文件轉換爲Core Data數據庫。 Core Data用來從SQLite讀取/寫入的格式是專有的。

您必須直接使用SQLite讀取數據。我建議使用類似FMDB的東西來讀取數據。要將數據放入核心數據存儲區，您應遵循Efficiently Importing Data的指導原則。