iOS:针对特定View Controller类的didReceiveRemoteNotification

Question

场景 =我有一个具有消息传递功能的应用程序.在发送消息时,还将向接收者的电话发送推送通知.我希望用户每当用户接收带有"警报"(在屏幕上显示消息),"徽章"(红色圆圈中的应用程序图标徽章编号)和"声音"(在推送时播放的声音)的推送通知是不是看Instant Messenger的屏幕-当用户IS的即时通讯屏幕上,我希望用户收到"徽章"和"声音" ONLY.

为什么我不想在Instant Messenger屏幕上发送"警报"？ 因为当消息加载到tableView时,即时消息屏幕已经向用户显示消息.当他们不得不一直点击它以便在屏幕上再次阅读时,我为什么要将IM推送到他们的屏幕上并显示"警报"？没有意义.

为什么我只希望用户在IM屏幕上收到"徽章"？ 这是因为我的应用程序不断检查要增加的应用程序的徽章计数,以便在引发应用程序徽章时刷新表格视图.我还希望播放"声音"以通过声音通知用户Push已进入他们的手机.

需要注意的事项 =我的应用程序基于一个架构,其中包含一个Tab栏控制器,其中包含每个选项卡的导航控制器.如果这有所作为.

编辑 - 总结和简化的问题.

你是怎么做到的？...(不是真正的代码)

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {

    if (isOnInstantMessagingScreen) {

        //Disable Push "Alert" messages
        //Enable Push "Badge"
        //Enable Push "Sound"
    }

    else {

        //Enable Push "Alert" messages
        //Enable Push "Badge"
        //Enable Push "Sound"
    }

Answer 1

虽然应用程序处于打开状态,但Apple会使通知静音,因此您有责任显示警报或播放声音.这是个好消息,因为您不必担心取消注册通知类型.

要回答第一个问题,您可以从应用程序委托中访问topMostViewController

UIViewController *topMostViewController = [(UINavigationController *)[self.tabBarController selectedViewController] topViewController];

我假设您已将tabBarController设置为属性

@property (strong, nonatomic) UITabBarController *tabBarController;

如果你有超过五个选项卡,selectedViewController可以是moreViewController在这种情况下,你可以尝试

UIViewController *topMostViewController = [(UINavigationController *)[[self.tabBarController viewControllers] objectAtIndex:[self.tabBarController selectedIndex]] topViewController];

然后,您可以指定布尔值 - MessageScreenViewController您的消息控制器在哪里

isOnInstantMessagingScreen = [topMostViewController isKindOfClass:[MessageScreenViewController class]];

您需要知道应用程序是否在前台才能显示UIAlertView并播放声音

if([application applicationState] == UIApplicationStateActive){}

如果用户不在消息传递屏幕上,您将需要显示通知并播放声音

if(!isOnInstantMessagingScreen){
   [PFPush handlePush:userInfo]; // Display alert - can also be UIAlertView

   //Play sound
   NSURL* musicFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Notification" ofType:@"wav"]];
        AVAudioPlayer *notify  = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile  error:nil];
        [notify play];

    //Perhaps increment badge number
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber: +1];
}

这对你有帮助吗？

最终解决方案看起来像(未经测试):

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    //The application is currently in the foreground
    if([application applicationState] == UIApplicationStateActive){
        UIViewController *topMostViewController = [(UINavigationController *)[self.tabBarController selectedViewController] topViewController];
        BOOL isOnInstantMessagingScreen = [topMostViewController isKindOfClass:[MessageScreenViewController class]];

        if(!isOnInstantMessagingScreen){
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Notification" message:[[userInfo objectForKey:@"aps"] objectForKey:@"alert"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:@"View", nil];
            alert.tag = 1;
            [alert show];

            //Play sound
            NSURL* musicFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Notification" ofType:@"wav"]];
            AVAudioPlayer *notify  = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile  error:nil];
            [notify play];

            //Perhaps increment badge number
            [[UIApplication sharedApplication] setApplicationIconBadgeNumber: +1];
        }
    } else {
        //Application is in background - When the notification is clicked on, we will get here
        [[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0]; //Clear notification as we have clicked it, potentially could also be -1 to decrement?

        UINavigationController *navigationController = (UINavigationController *)[self.tabBarController.viewControllers objectAtIndex:2];
        BOOL isOnInstantMessagingScreen = [[navigationController topViewController] isKindOfClass:[MessageScreenViewController class]];

        //Perhaps we want to navigate to the message controller screen
        if(!isOnInstantMessagingScreen){

            //Somehow push the messaging screen onto the UINavigationController
            //This could be done here by alloc and initing the view controller
            MessageScreenViewController *viewContoller = [[MessageScreenViewController alloc] init];
            [navigationController pushViewController:viewContoller animated:YES];

            //Or perhaps by calling a function on the rootView of the UINavigationController
            RootViewController *rootViewController = (RootViewController *)[navigationController.viewControllers objectAtIndex:0];
            [rootViewController loadMessageScreenWithUserInfo:userInfo];

            //Show tab
            [self.tabBarController setSelectedIndex:2]; // Index of NavigationController which will contain the MessageViewController
        }
    }
}