ios - 如何为 didReceiveRemoteNotification 生成组合发布者？

Question

我正在尝试从 didReceiveRemoteNotification 生成一个联合发布者
类似于下面的这段代码:

NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)

我想使用 SwiftUI Lifecycle 并且不想使用 AppDelegate 方法使用 @UIApplicationDelegateAdaptor

Answer 1

没有Notification命名 didReceiveRemoteNotification ，但您可以在 UIApplication 的扩展中声明它:

extension UIApplication {
    static let didReceiveRemoteNotification = Notification.Name("didReceiveRemoteNotification")
}

那么你需要发布 Notification来自 AppDelegate :

extension AppDelegate {
    
    func application(_ application: UIApplication,
                     didReceiveRemoteNotification userInfo: [AnyHashable : Any],
                     fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        
        NotificationCenter.default.post(name: UIApplication.didReceiveRemoteNotification,
                                        object: nil)
        
        // etc...
    }
    
}

这将允许您使用通常的语法:

NotificationCenter.default.publisher(for: UIApplication.didReceiveRemoteNotification)