CoreData 1 Store JSON data to CoreData

Swift 3.0 // // ViewController.swift // CoreData001 // // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit import CoreData class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { private let AIZU_DATA_STORE: String = "AizuDataStore" private var aizuDatas: [AizuDataStore] = [] override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. insertDataFromJson() aizuDatas = loadDatas() // Table View. let barHeight: CGFloat = UIApplication.shared.statusBarFrame.size.height let displayWidth: CGFloat = self.view.frame.width let displayHeight: CGFloat = self.view.frame.height let myTableView: UITableView = UITableView(frame: CGRect(x: 0, y: barHeight, width: displayWidth, height: displayHeight)) myTableView.register(UITableViewCell.self, forCellReuseIdentifier: "MyCell") myTableView.dataSource = self myTableView.delegate = self self.view.addSubview(myTableView) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } /* CoreDataからデータの読み込み */ func loadDatas() -> [AizuDataStore] { let appDel: AppDelegate = (UIApplication.shared.delegate as! AppDelegate) let context = appDel.persistentContainer.viewContext // Request let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: AIZU_DATA_STORE) fetchRequest.returnsObjectsAsFaults = false // Access to CoreData do { if let aizuDatas = try context.fetch(fetchRequest) as? [AizuDataStore] { return aizuDatas } else { return [] } } catch let error as NSError{ print(error.localizedDescription) return [] } } /* JSONファイルを読み込みCoreDataにInsert. */ private func insertDataFromJson() { // Path. let jsonDataPath: NSString = Bundle.main.path(forResource: "AizuData", ofType: "json")! // Data. let jsonRawData: NSData! = NSData(contentsOfFile: jsonDataPath as String) print("jsonRawData:\(jsonRawData)") // JSONのパース. let jsonDictionary: [[String: AnyObject]] do { jsonDictionary = try JSONSerialization.jsonObject(with: jsonRawData as Data, options: []) as! [[String: AnyObject]] } catch { print("Error JSONObjectWithData:\(error)") return } let appDel: AppDelegate = (UIApplication.shared.delegate as! AppDelegate) let context = appDel.persistentContainer.viewContext let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: AIZU_DATA_STORE) let deleteAll = NSBatchDeleteRequest(fetchRequest: fetchRequest) do { try context.execute(deleteAll) } catch { print("Error excuteRequest(deleteAll):\(error)") } // Entityを定義. let entity: NSEntityDescription! = NSEntityDescription.entity(forEntityName: AIZU_DATA_STORE, in: context) // JSONデータを配列分、CoreDataに格納. for jsonData: AnyObject in jsonDictionary { print("jsonData:\(jsonData)") let aizuDataStore: AizuDataStore = AizuDataStore(entity: entity, insertInto: context) do { try aizuDataStore.updateFromDictionary(dataDictionary: jsonData as! [String : AnyObject]) } catch { print("Error updateFromDictionary:\(error)") } do { try context.save() } catch { print("Error save:\(error)") } } } /* Cellが選択された際に呼び出される */ func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { print("Num: \(indexPath.row)") print("Value: \(aizuDatas[indexPath.row])") } /* Cellの総数を返す. */ func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return aizuDatas.count } /* Cellに値を設定する */ func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // 再利用するCellを取得する. let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath as IndexPath) // Cellに値を設定する. cell.textLabel!.text = "\(aizuDatas[indexPath.row].title)" return cell } } AizuDataStore.swift // // AizuDataStore.swift // // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit import CoreData @objc(AizuDataStore) class AizuDataStore: NSManagedObject { @NSManaged var id: NSNumber @NSManaged var title: String @NSManaged var content: String func updateFromDictionary(dataDictionary: [String: AnyObject]) throws { // バリデーション. guard let tmp_id: NSNumber = dataDictionary["id"] as? NSNumber, let tmp_title: String = dataDictionary["title"] as? String, let tmp_content: String = dataDictionary["content"] as? String else{ throw NSError(domain: "Failed validation of JSON object. ", code: -1, userInfo: nil) } // データを反映. id = tmp_id title = tmp_title content = tmp_content } } Swift 2.3 ViewController.swift // // ViewController.swift // CoreData001 // // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit import CoreData class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource { private let AIZU_DATA_STORE: String = "AizuDataStore" private var aizuDatas: [AizuDataStore] = [] override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. insertDataFromJson() aizuDatas = loadDatas() // Table View. let barHeight: CGFloat = UIApplication.sharedApplication().statusBarFrame.size.height let displayWidth: CGFloat = self.view.frame.width let displayHeight: CGFloat = self.view.frame.height let myTableView: UITableView = UITableView(frame: CGRectMake(0, barHeight, displayWidth, displayHeight)) myTableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "MyCell") myTableView.dataSource = self myTableView.delegate = self self.view.addSubview(myTableView) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } /* CoreDataからデータの読み込み */ func loadDatas() -> [AizuDataStore] { // Context let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate let context: NSManagedObjectContext = appDel.managedObjectContext // Request let fetchRequest: NSFetchRequest = NSFetchRequest(entityName: AIZU_DATA_STORE) fetchRequest.returnsObjectsAsFaults = false // Access to CoreData do { if let aizuDatas = try context.executeFetchRequest(fetchRequest) as? [AizuDataStore] { return aizuDatas } else { return [] } } catch let error as NSError{ print(error.localizedDescription) return [] } } /* JSONファイルを読み込みCoreDataにInsert. */ private func insertDataFromJson() { // Path. let jsonDataPath: NSString = NSBundle.mainBundle().pathForResource("AizuData", ofType: "json")! // Data. let jsonRawData: NSData! = NSData(contentsOfFile: jsonDataPath as String) print("jsonRawData:\(jsonRawData)") // JSONのパース. let jsonDictionary: [[String: AnyObject]] do { jsonDictionary = try NSJSONSerialization.JSONObjectWithData(jsonRawData, options: []) as! [[String: AnyObject]] } catch { print("Error JSONObjectWithData:\(error)") return } let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate let context: NSManagedObjectContext = appDel.managedObjectContext // 全データを削除. let fetchRequest = NSFetchRequest(entityName: AIZU_DATA_STORE) let deleteAll = NSBatchDeleteRequest(fetchRequest: fetchRequest) do { try context.executeRequest(deleteAll) } catch { print("Error excuteRequest(deleteAll):\(error)") } // Entityを定義. let entity: NSEntityDescription! = NSEntityDescription.entityForName(AIZU_DATA_STORE, inManagedObjectContext: context) // JSONデータを配列分、CoreDataに格納. for jsonData: AnyObject in jsonDictionary { print("jsonData:\(jsonData)") let aizuDataStore: AizuDataStore = AizuDataStore(entity: entity, insertIntoManagedObjectContext: context) do { try aizuDataStore.updateFromDictionary(jsonData as! [String : AnyObject]) } catch { print("Error updateFromDictionary:\(error)") } do { try context.save() } catch { print("Error save:\(error)") } } } /* Cellが選択された際に呼び出される */ func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { print("Num: \(indexPath.row)") print("Value: \(aizuDatas[indexPath.row])") } /* Cellの総数を返す. */ func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return aizuDatas.count } /* Cellに値を設定する */ func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { // 再利用するCellを取得する. let cell = tableView.dequeueReusableCellWithIdentifier("MyCell", forIndexPath: indexPath) // Cellに値を設定する. cell.textLabel!.text = "\(aizuDatas[indexPath.row].title)" return cell } } AizuDataStore.swift // // AizuDataStore.swift // // Copyright © 2016年 FaBo, Inc. All rights reserved. // import UIKit import CoreData @objc(AizuDataStore) class AizuDataStore: NSManagedObject { @NSManaged var id: NSNumber @NSManaged var title: String @NSManaged var content: String func updateFromDictionary(dataDictionary: [String: AnyObject]) throws { // バリデーション. guard let tmp_id: NSNumber = dataDictionary["id"] as? NSNumber, tmp_title: String = dataDictionary["title"] as? String, tmp_content: String = dataDictionary["content"] as? String else{ throw NSError(domain: "Failed validation of JSON object. ", code: -1, userInfo: nil) } // データを反映. id = tmp_id title = tmp_title content = tmp_content } } 2.xと3.xの差分 自動生成されるAppDelegateのCoreDataの記述が変更。 let context: NSManagedObjectContext = appDel.managedObjectContextがlet context = appDel.persistentContainer.viewContextに。