Question

对象存在于firebase上。根据对象ID打开详细视图。当应用程序背景并且从

调用该函数时，它工作正常

func userNotificationCenter(_ center: UNUserNotificationCenter,
                            didReceive response: UNNotificationResponse,
                            withCompletionHandler completionHandler: @escaping () -> Void)

当应用程序被杀死并且处理通知时，快照返回null。

App Delegate：

AppName.shared.user.shareReplayLatestWhileConnected().filterNil().distinctUntilChanged({ lhs, rhs in
        return lhs.key == rhs.key
    }).subscribe() { event in
        switch event {
        case .next(let user):
            self.userIdString = user.key
           ...
            if let notificationInfo = launchOptions?[UIApplicationLaunchOptionsKey.remoteNotification] as? [AnyHashable: Any] {
                self.handleMessageFromRemoteNotification(notificationInfo)
                }
            }...

处理程序：

Event.load(url.lastPathComponent).single().subscribe(onNext: { event in
            //prepare and present view here...
        }).addDisposableTo(disposeBag)

事件加载失败功能：

static func load(_ id: String) -> Observable<Event> {
    return Observable.create() { observer in
        FirebaseDatabase.sharedInstance.ref.child("events/\(id)").observeSingleEvent(of: .value, with: {
            snapshot in
            //This the null snapshot
            if snapshot.exists() {
                if let event = Event(snapshot: snapshot) {
                    observer.onNext(event)
                }
                observer.on(.completed)
            } else {
                observer.on(.completed)
            }
        })
        return Disposables.create()
    }
}

Answer 1

目前

FirebaseDatabase.sharedInstance.ref.child("events/\(id)").observe(.value

与

相反

FirebaseDatabase.sharedInstance.ref.child("events/\(id)").observeSingleEvent(of: .value

似乎要解决它，会发表更多评论。

处理launchOptions时RxSwift FirebaseDatabase快照<null>？[UIApplicationLaunchOptionsKey.remoteNotification]

1 个答案: