![{
"name": "groupA",
"persons": [
{
"name": "Francis Henry"
},
{
"name": "Williamson Sargent"
},
{
"name": "Vivian Henderson"
}
]
}
http://www.json-generator.com
サンプル](https://image.slidesharecdn.com/20150826-150826143907-lva1-app6892/85/20150826-Realm-Himotoki-6-320.jpg)
![class Group : Object, Decodable {
dynamic var name : String = ""
let persons = List<Person>() // ArrayじゃなくてList
static func decode(e: Extractor) -> Group? {
return build(
e <| "name",
e <|| "persons"
).map(Group.init)
}
init(_name: String, _persons: [Person]) {
name = _name
super.init()
// ここで関連付け
for person in _persons {
person.group = self
persons.append(person)
}
}
∼略∼
}
Group](https://image.slidesharecdn.com/20150826-150826143907-lva1-app6892/85/20150826-Realm-Himotoki-8-320.jpg)
20150826 RealmとHimotoki
- 2. @itok_twit • いとうけい（itok） • 公私共にプログラマ iOS / Mac（たまに Android や Windows） • http://itok.jp/
- 3. Realm SQLite / CoreData 置き換えデータベース https://realm.io
- 6. { "name": "groupA", "persons": [ { "name": "Francis Henry" }, { "name": "Williamson Sargent" }, { "name": "Vivian Henderson" } ] } http://www.json-generator.com サンプル
- 7. class Person : Object, Decodable { dynamic var name: String = "" dynamic var group: Group? static func decode(e: Extractor) -> Person? { return build( e <| "name" ).map(Person.init) } init(_name: String) { name = _name super.init() } // Realm対応のために必要（Objectを継承しているので） required init() { super.init() } override init(realm: RLMRealm, schema: RLMObjectSchema) { super.init(realm: realm, schema: schema) } } Person
- 8. class Group : Object, Decodable { dynamic var name : String = "" let persons = List<Person>() // ArrayじゃなくてList static func decode(e: Extractor) -> Group? { return build( e <| "name", e <|| "persons" ).map(Group.init) } init(_name: String, _persons: [Person]) { name = _name super.init() // ここで関連付け for person in _persons { person.group = self persons.append(person) } } ∼略∼ } Group
- 9. guard let realm = try? Realm() else { return } realm.write({ () -> Void in if let group : Group = decode(json) { realm.add(group) } }) let result = realm.objects(Person) print(result.description) 実行 簡単！
- 11. class MyObject : Object { // didSetが使えないので2段階に構える var jsonData : NSData { set(newValue) { jsonDataBacking = newValue // バイナリを格納 p_data = nil // JSONオブジェクトを初期化 } get { return jsonDataBacking } } private dynamic var jsonDataBacking : NSData = NSData() private var p_data : BigData? // BigDataの取り出し口 var data : BigData? { if p_data == nil { // バイナリから必要に応じて生成 if let json = try? NSJSONSerialization… { p_data = decode(json) } } return p_data } }