[swift2.0] CSVデータによるCoreDataの初期化[MagicalRecord]

appDelegate.swift

extension String : CollectionType{}

class AppDelegate: UIResponder, UIApplicationDelegate {
    ...
    
    //DB初期データ
    func setDefaultData() {
        var memos:[Memo]! = Memo.MR_findAll() as! [Memo]
        
        if let first = memos?.first {
            print("** Default data is already set up **")
        } else {
            print("** Default data is empty !! ** ")
            let filePath = NSBundle.mainBundle().pathForResource("Memo", ofType: "csv")
            do {
                let data = try NSString(contentsOfFile: filePath!, encoding: NSUTF8StringEncoding) as String
                
                //memo保存
                data.enumerateLines{ (line, stop) -> () in
                    let item:[String] = line.split{
                        $0 == ","
                    }
                    
                    let newRecord:Memo = Memo.MR_createEntity() as Memo
                    newRecord.title = item[0]
                    if item.count > 1  {
                        newRecord.value = item[1]
                    } else {
                        newRecord.value = ""
                    }
                    newRecord.managedObjectContext!.MR_saveToPersistentStoreAndWait()
                }
             
            } catch _{
                print( "err")
            }
        }
    }
}