0 
Firebase * ref = nil;


NSInteger iid = [[API sharedInstance] userid];
NSString * path = [NSString stringWithFormat:  @"http://example.firebaseIO.com/user/%d/conversations", iid];

ref = [[Firebase alloc] initWithUrl:path];


if(ref) {

    NSString * path = [NSString stringWithFormat: @"http://example.firebaseIO.com/conversations"];
    Firebase * conv = [[Firebase alloc] initWithUrl: path];

    [ref observeEventType:FEventTypeChildAdded withBlock:^(FDataSnapshot *snapshot) {

        // name of conversation
        NSString * name = snapshot.name;
        Firebase * ref1 = [conv childByAppendingPath: name];

        [ref1 observeSingleEventOfType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot) {

            if(snapshot.value != [NSNull null] && ![snapshot.value isKindOfClass: [NSString class]])
            {
                FDataSnapshot * chatsnapshot = [snapshot childSnapshotForPath: @"chats"];

                NSInteger numChatMessages = chatsnapshot.childrenCount;
                numberOfTotalChatMessages += numChatMessages;

                NSMutableDictionary *m = [snapshot.value mutableCopy];
                [m setValue: snapshot.name forKey: @"ref_name"];

                NSInteger current_user = [[API sharedInstance] userid];
                NSString * userpath = [NSString stringWithFormat: @"users/%d", current_user];
                FDataSnapshot * usersnapshot = [snapshot childSnapshotForPath: userpath];

                if(usersnapshot.value != [NSNull null] && ![usersnapshot.value isKindOfClass: [NSString class]])
                {
                    NSDictionary * userdict = usersnapshot.value;
                    NSInteger numUserMessagesRead = [userdict[@"numOfMessages"] intValue];

                    numberOfMessagesRead += numUserMessagesRead;

                    if(numberOfTotalChatMessages > numberOfMessagesRead) {
                        [m setValue: @"true" forKey: @"bubble"];
                    }
                }

                [self.chats addObject: m];

                NSNumber * index = [NSNumber numberWithInt: self.chats.count - 1];
                [read setValue: index forKey: snapshot.name];

                PLRightMenuViewController * rightPanel = (PLRightMenuViewController *) self.viewController.rightPanel;
                [rightPanel.tableView reloadData];

                self.numChats = numberOfTotalChatMessages - numberOfMessagesRead;
                [[UIApplication sharedApplication] setApplicationIconBadgeNumber: self.numChats];

            }
        }];

    }];


    [ref observeEventType:FEventTypeChildChanged withBlock:^(FDataSnapshot *snapshot) {

        NSString * name = snapshot.name;
        Firebase * ref1 = [conv childByAppendingPath: name];

        [ref1 observeSingleEventOfType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot)
        {
            if(snapshot.value != [NSNull null] && ![snapshot.value isKindOfClass: [NSString class]])
            {
                numberOfTotalChatMessages += 1;

                NSMutableDictionary *m = [snapshot.value mutableCopy];
                [m setValue: snapshot.name forKey: @"ref_name"];
                [m setValue: @"true" forKey: @"bubble"];
                [self.chats addObject: m];


                if([read objectForKey: snapshot.name])
                {
                    NSInteger index = [[read objectForKey: snapshot.name] intValue];
                    [self.chats removeObjectAtIndex: index];

                     NSNumber * index1 = [NSNumber numberWithInt: self.chats.count - 1];
                    [read setValue: index1 forKey: snapshot.name];
                }

                self.numChats = numberOfTotalChatMessages - numberOfMessagesRead;
                [[UIApplication sharedApplication] setApplicationIconBadgeNumber: self.numChats];


                PLRightMenuViewController * rightPanel = (PLRightMenuViewController *) self.viewController.rightPanel;
                [rightPanel.tableView reloadData];
            }
        }];

    }];
}

基本的に、firebase を使用して新しいチャット会話をチェックし、アプリケーション バッジ番号を変更する上記のコードがあります。誰かが現在アプリを使用しているかどうかに関係なく、アプリケーション バッジ番号が変更されるように、アプリのバックグラウンドでコードを実行するにはどうすればよいですか?

基本的に、上記のコードをバックグラウンドで実行するにはどうすればよいですか? Appdelegate で何を変更すればよいですか?

4

5 に答える 5

1 
// @interface

// Declare Private property
@property (nonatomic) UIBackgroundTaskIdentifier backgroundTask;

//@end
// ...

// Copy into
//@implementation 

- (void)setupBackgrounding {
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(appBackgrounding:)
                                                 name: UIApplicationDidEnterBackgroundNotification
                                               object: nil];
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(appForegrounding:)
                                                 name: UIApplicationWillEnterForegroundNotification
                                               object: nil];
}

- (void)appBackgrounding: (NSNotification *)notification {
    [self keepAlive];
}

- (void) keepAlive {
    self.backgroundTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
        [[UIApplication sharedApplication] endBackgroundTask:self.backgroundTask];
        self.backgroundTask = UIBackgroundTaskInvalid;
        [self keepAlive];
    }];
}

- (void)appForegrounding: (NSNotification *)notification {
    if (self.backgroundTask != UIBackgroundTaskInvalid) {
        [[UIApplication sharedApplication] endBackgroundTask:self.backgroundTask];
        self.backgroundTask = UIBackgroundTaskInvalid;
    }
}
于 2014-10-15T22:54:02.877 に答える