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96 lines
2.8 KiB
96 lines
2.8 KiB
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2014 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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import UIKit
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import RealmSwift
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class Dog: Object {
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@objc dynamic var name = ""
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@objc dynamic var age = 0
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}
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class Person: Object {
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@objc dynamic var name = ""
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let dogs = List<Dog>()
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}
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#if !swift(>=4.2)
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extension UIApplication {
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typealias LaunchOptionsKey = UIApplicationLaunchOptionsKey
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}
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#endif
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@UIApplicationMain
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class AppDelegate: UIResponder, UIApplicationDelegate {
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var window: UIWindow?
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func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
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window = UIWindow(frame: UIScreen.main.bounds)
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window?.rootViewController = UIViewController()
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window?.makeKeyAndVisible()
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do {
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try FileManager.default.removeItem(at: Realm.Configuration.defaultConfiguration.fileURL!)
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} catch {}
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// Create a standalone object
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let mydog = Dog()
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// Set & read properties
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mydog.name = "Rex"
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mydog.age = 9
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print("Name of dog: \(mydog.name)")
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// Realms are used to group data together
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let realm = try! Realm() // Create realm pointing to default file
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// Save your object
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realm.beginWrite()
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realm.add(mydog)
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try! realm.commitWrite()
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// Query
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let results = realm.objects(Dog.self).filter(NSPredicate(format: "name contains 'x'"))
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// Queries are chainable!
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let results2 = results.filter("age > 8")
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print("Number of dogs: \(results.count)")
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print("Dogs older than eight: \(results2.count)")
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// Link objects
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let person = Person()
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person.name = "Tim"
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person.dogs.append(mydog)
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try! realm.write {
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realm.add(person)
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}
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// Multi-threading
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DispatchQueue.global().async {
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autoreleasepool {
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let otherRealm = try! Realm()
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let otherResults = otherRealm.objects(Dog.self).filter(NSPredicate(format: "name contains 'Rex'"))
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print("Number of dogs \(otherResults.count)")
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}
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}
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return true
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}
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}
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