gpt4 book ai didi

ios - 使用 UISceneDelegate 将旧 Xcode 项目迁移到新项目

转载 作者:行者123 更新时间:2023-12-01 21:26:34 25 4
gpt4 key购买 nike

我有一个没有 UISceneDelegate 的旧 Xcode 项目方法。是否可以使用 UISceneDelegate 将旧 Xcode 项目迁移到新项目方法但仍保持与 iOS 12 的兼容性?
如果是这样,怎么做?因为我在 iOS 14 中看到了很多错误,唯一的解决方法是使用 UISceneDelegate 方法。

最佳答案

编辑1:
确保您查询 windowOrientation , 在 View Controller 的 View 被渲染之后。通常在 viewDidLoad()viewWillAppear(_:) , view.windownil ,检查这个answer .只需检查 windowOrientation 的值在 viewDidAppear(_:) .
如果您在尝试以下定义之前访问此值有一些问题

private var windowOrientation: UIInterfaceOrientation {
if #available(iOS 13.0, *) {
return UIApplication.shared.windows.first?.windowScene?.interfaceOrientation ?? .unknown
} else {
// Fallback on earlier versions
return UIApplication.shared.statusBarOrientation
}
}
我不确定您的应用程序是否使用多个窗口,但如果只有一个(因为您没有以编程方式创建任何窗口),以下定义应该可以正常工作。
var hasTopNotch: Bool {
return UIApplication.shared.windows.first?.safeAreaInsets.top ?? 0 > 20
}
原答案: UISceneDelegate已在 iOS 13.0 中介绍所以无法兼容 iOS 12 , 你需要依赖 UIApplicationDelegate完全。支持 UISceneDelegateiOS 13.x ,您需要添加显式可用性检查以避免编译错误。
步骤 1:在 Info.plist 中添加场景 list
打开 Info.plistSource Code并添加以下内容
<key>UIApplicationSceneManifest</key>
<dict>
<key>UIApplicationSupportsMultipleScenes</key>
<false/>
<key>UISceneConfigurations</key>
<dict>
<key>UIWindowSceneSessionRoleApplication</key>
<array>
<dict>
<key>UISceneConfigurationName</key>
<string>Default Configuration</string>
<key>UISceneDelegateClassName</key>
<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
<key>UISceneStoryboardFile</key>
<string>Main</string>
</dict>
</array>
</dict>
</dict>
第 2 步:创建 SceneDelegate.swift具有以下内容的文件
import UIKit
@available(iOS 13.0, *)
class SceneDelegate: UIResponder, UIWindowSceneDelegate {

var window: UIWindow?


func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
guard let _ = (scene as? UIWindowScene) else { return }
}

func sceneDidDisconnect(_ scene: UIScene) {
// Called as the scene is being released by the system.
// This occurs shortly after the scene enters the background, or when its session is discarded.
// Release any resources associated with this scene that can be re-created the next time the scene connects.
// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
}

func sceneDidBecomeActive(_ scene: UIScene) {
// Called when the scene has moved from an inactive state to an active state.
// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}

func sceneWillResignActive(_ scene: UIScene) {
// Called when the scene will move from an active state to an inactive state.
// This may occur due to temporary interruptions (ex. an incoming phone call).
}

func sceneWillEnterForeground(_ scene: UIScene) {
// Called as the scene transitions from the background to the foreground.
// Use this method to undo the changes made on entering the background.
}

func sceneDidEnterBackground(_ scene: UIScene) {
// Called as the scene transitions from the foreground to the background.
// Use this method to save data, release shared resources, and store enough scene-specific state information
// to restore the scene back to its current state.
}


}
第 3 步:更新 AppDelegate
  • 添加 UISceneSession Lifecycle方法。
  • // MARK: UISceneSession Lifecycle
    @available(iOS 13.0, *)
    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
    // Called when a new scene session is being created.
    // Use this method to select a configuration to create the new scene with.
    return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
    }
    @available(iOS 13.0, *)
    func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
    // Called when the user discards a scene session.
    // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
    // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
    }
    ii) 最后引用 Apple Documentation .您可以引用 https://dev.to/kevinmaarek/add-a-scene-delegate-to-your-current-project-5on用于额外的清理和设置任务。

    关于ios - 使用 UISceneDelegate 将旧 Xcode 项目迁移到新项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63423257/

    25 4 0
    Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
    广告合作:1813099741@qq.com 6ren.com