如何为didReceiveRemoteNotification生成Combine Publisher? [英] How to generate a Combine Publisher for didReceiveRemoteNotification?

问题描述

我正在尝试根据 didReceiveRemoteNotification

类似于下面的代码:

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

我想使用SwiftUI生命周期，并且不想通过 @UIApplicationDelegateAdaptor

I want to use SwiftUI Lifecycle and don't want to use AppDelegate methods using @UIApplicationDelegateAdaptor

推荐答案

没有名为 didReceiveRemoteNotification 的 Notification ，但是您可以在的扩展名中对其进行声明UIApplication :

There is no Notification named didReceiveRemoteNotification, but you can declare it in an extension on UIApplication:

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

然后，您需要从 AppDelegate 发布 Notification :

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

这将允许您使用常规语法:

That will allow you to use the usual syntax:

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

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