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78 lines
3.5 KiB
78 lines
3.5 KiB
//
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// SceneDelegate.swift
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// Weibo
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//
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// Created by Qihua Pan on 2020/8/16.
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// Copyright © 2020 Qihua Pan. All rights reserved.
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//
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import UIKit
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import SwiftUI
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import CoreData
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class SceneDelegate: UIResponder, UIWindowSceneDelegate {
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var window: UIWindow?
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func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
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// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
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// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
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// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
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// Get the managed object context from the shared persistent container.
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let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
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// Create the SwiftUI view and set the context as the value for the managedObjectContext environment keyPath.
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// Add `@Environment(\.managedObjectContext)` in the views that will need the context.
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let contentView = ContentView().environment(\.managedObjectContext, context).environmentObject(UserData.getUser())
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// Use a UIHostingController as window root view controller.
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if let windowScene = scene as? UIWindowScene {
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let window = UIWindow(windowScene: windowScene)
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window.rootViewController = UIHostingController(rootView: contentView)
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self.window = window
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window.makeKeyAndVisible()
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}
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}
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func sceneDidDisconnect(_ scene: UIScene) {
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// Called as the scene is being released by the system.
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// This occurs shortly after the scene enters the background, or when its session is discarded.
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// Release any resources associated with this scene that can be re-created the next time the scene connects.
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// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
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}
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func sceneDidBecomeActive(_ scene: UIScene) {
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// Called when the scene has moved from an inactive state to an active state.
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// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
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}
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func sceneWillResignActive(_ scene: UIScene) {
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// Called when the scene will move from an active state to an inactive state.
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// This may occur due to temporary interruptions (ex. an incoming phone call).
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}
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func sceneWillEnterForeground(_ scene: UIScene) {
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// Called as the scene transitions from the background to the foreground.
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// Use this method to undo the changes made on entering the background.
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}
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func sceneDidEnterBackground(_ scene: UIScene) {
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// Called as the scene transitions from the foreground to the background.
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// Use this method to save data, release shared resources, and store enough scene-specific state information
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// to restore the scene back to its current state.
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// Save changes in the application's managed object context when the application transitions to the background.
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(UIApplication.shared.delegate as? AppDelegate)?.saveContext()
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}
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}
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struct SceneDelegate_Previews: PreviewProvider {
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static var previews: some View {
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/*@START_MENU_TOKEN@*/Text("Hello, World!")/*@END_MENU_TOKEN@*/
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}
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}
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