Swift で CoreData の必要な初期データー（マスターデータ）を用意する ref: http://qiita.com/matsuhisa@github/items/741d7b1c2541ea6fc68d

file0.swift

    func initMasters() {
        println("initMasters ------------")

        // plist の読み込み
        let path:NSString = NSBundle.mainBundle().pathForResource("Masterdata", ofType: "plist")!

        var masterDataDictionary:NSDictionary = NSDictionary(contentsOfFile: path)


        let app: AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
        let categoryContext: NSManagedObjectContext = app.managedObjectContext!

        for(var i = 1; i<=masterDataDictionary.count; i++) {
            let index_name: String = "Category" + String(i)
            var item: AnyObject = masterDataDictionary[index_name]!
            println(item["name"])

            let categoryEntity: NSEntityDescription! = NSEntityDescription.entityForName(
                "Categories",
                inManagedObjectContext: categoryContext
            )
            var new_data  = NSManagedObject(entity: categoryEntity, insertIntoManagedObjectContext: categoryContext)
            //new_data.name = item["name"] as String
            new_data.setValue(item["name"] as String, forKey: "name")

            var error: NSError?
            categoryContext.save(&error)
        }


        println("------------")
    }

file1.swift

    override func viewDidLoad() {
        super.viewDidLoad()       
        var results:NSArray = readData()
        if(results.count == 0) {
            // 初期データーの投入
            initMasters()
            results = readData()
        }
    }

file2.swift

//  ViewController.swift
//  TestAppCoreDataInitApp01

import UIKit
import CoreData

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        var results:NSArray = readData()

        if(results.count == 0) {
            // 初期データーの投入
            initMasters()
            results = readData()
        }
    }

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

    func readData() -> NSArray{
        println("readData ------------")
        let app: AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
        let categoryContext: NSManagedObjectContext = app.managedObjectContext!
        let categoryRequest: NSFetchRequest = NSFetchRequest(entityName: "Categories")

        var results: NSArray! = categoryContext.executeFetchRequest(categoryRequest, error: nil)
        for data in results {
            println("------------")
            println(data.name?)
            println("------------")
        }

        return results
    }

    func initMasters() {
        println("initMasters ------------")

        // plist の読み込み
        let path:NSString = NSBundle.mainBundle().pathForResource("Masterdata", ofType: "plist")!

        var masterDataDictionary:NSDictionary = NSDictionary(contentsOfFile: path)


        let app: AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
        let categoryContext: NSManagedObjectContext = app.managedObjectContext!

        for(var i = 1; i<=masterDataDictionary.count; i++) {
            let index_name: String = "Category" + String(i)
            var item: AnyObject = masterDataDictionary[index_name]!
            println(item["name"])

            let categoryEntity: NSEntityDescription! = NSEntityDescription.entityForName(
                "Categories",
                inManagedObjectContext: categoryContext
            )
            var new_data  = NSManagedObject(entity: categoryEntity, insertIntoManagedObjectContext: categoryContext)
            //new_data.name = item["name"] as String
            new_data.setValue(item["name"] as String, forKey: "name")

            var error: NSError?
            categoryContext.save(&error)
        }


        println("------------")
    }

}