在特定时间间隔重复警报

Posted 2023-02-24

【中文标题】在特定时间间隔重复警报

【英文标题】：Repeat alarm at particular time interval

【发布时间】：2013-04-03 13:35:55

【问题描述】：

问题是，我以编程方式放置了一个日期选择器。在日期选择器中，我只是用来显示从 1 分钟到 23 小时的时间。用户应该在选择器中设置时间，并设置通知。 现在，我在后台收到通知，但只有一次。我必须重复时间，直到计时器不会停止。

我发现太多链接和来源但无法解决这个问题

我的代码：

在 Appdelegate.m 中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

    application.applicationIconBadgeNumber = 0;

    //------ Handle launching from a notification-------
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];

    self.localNotification =[launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
    if (self.localNotification)
    
        application.applicationIconBadgeNumber = self.localNotification.applicationIconBadgeNumber-1;
        NSLog(@"badge number: %d", application.applicationIconBadgeNumber);
        [self playSoundWithNotification:self.localNotification];
    
    else
    
        [[UIApplication sharedApplication]cancelAllLocalNotifications];
    

didenterin背景：

- (void)applicationDidEnterBackground:(UIApplication *)application

    NSLog(@"Application entered background state.");
    NSAssert(self->bgTask == UIBackgroundTaskInvalid, nil);

    bgTask = [application beginBackgroundTaskWithExpirationHandler: ^
        dispatch_async(dispatch_get_main_queue(), ^
            [application endBackgroundTask:self->bgTask];
            self->bgTask = UIBackgroundTaskInvalid;
        );
    ];

    dispatch_async(dispatch_get_main_queue(), ^
        while ([application backgroundTimeRemaining] > 1.0)
        
            NSString *str_friend = @"Hello,";
            if (str_friend)
            
                UILocalNotification *localNotif = [[UILocalNotification alloc] init];
                if (localNotif)
                
                    localNotif.alertBody = [NSString stringWithFormat:
                                            NSLocalizedString(@"%@ has a message for you.", nil), str_friend];
                    localNotif.alertAction = NSLocalizedString(@"Read Msg", nil);
                    localNotif.soundName = @"alarmsound.caf";
                   //localNotif.soundName =[NSString stringWithFormat:@"%@.mp3",str_Alarm];
                    localNotif.applicationIconBadgeNumber = 1;
                    [application presentLocalNotificationNow:localNotif];

                    NSLog(@"sound: %@, alertAction: %@, alerBody: %@",localNotif.soundName, localNotif.alertAction, localNotif.alertBody);
                    str_friend = nil;
                    break;
                
            
        
        [application endBackgroundTask:self->bgTask];
        self->bgTask = UIBackgroundTaskInvalid;
    );

-

(void)playSoundWithNotification:(UILocalNotification *)notification

   notification.soundName=[NSString stringWithFormat:@"%@.mp3",str_Alarm];
    NSLog(@"soundname: %@",notification.soundName);


- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif

    testDate=notif.fireDate;
    NSLog(@"DATE IS: %@, %@",testDate, notif.fireDate);
    // Handle the notificaton when the app is running
    NSLog(@"Recieved Notification %@",notif);
    [self playSoundWithNotification:notif];

    [self _showAlert:[NSString stringWithFormat:@"%@",str_Motivation] withTitle:@"Daily Achiever"];


- (void) _showAlert:(NSString*)pushmessage withTitle:(NSString*)title

    UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:title message:pushmessage delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alertView show];
    if (alertView)
    
    

在我的视图控制器中：

-(void)insert:(NSDate *)fire

    appDelegate=(AppDelegate *)[[UIApplication sharedApplication] delegate];
    appDelegate.localNotification = [[UILocalNotification alloc] init];
    NSLog(@"localNotification %@", appDelegate.localNotification);

    if (appDelegate.localNotification == nil)
        return;

    appDelegate.localNotification.fireDate = fire;
    appDelegate.localNotification.timeZone = [NSTimeZone defaultTimeZone];
    appDelegate.localNotification.alertBody = appDelegate.str_Motivation;
    appDelegate.localNotification.alertAction = @"View";
    appDelegate.localNotification.soundName = [NSString stringWithFormat:@"%@.mp3",appDelegate.str_Alarm];

    appDelegate.localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber]+1;
    NSLog(@"localNotification.alertBody %@", appDelegate.localNotification.alertBody);
    NSLog(@"localNotification.soundName %@",appDelegate.localNotification.soundName);
    [[UIApplication sharedApplication] scheduleLocalNotification:appDelegate.localNotification];

请帮忙。

【参考方案1】：

- (void)applicationDidEnterBackground:(UIApplication *)application

    ......
    ......
    if (localNotif)
    
      localNotif.alertBody = [NSString stringWithFormat:
                                                NSLocalizedString(@"%@ has a message for you.", nil), str_friend];
      localNotif.alertAction = NSLocalizedString(@"Read Msg", nil);
      localNotif.soundName = @"alarmsound.caf";
      localNotif.applicationIconBadgeNumber = 1;
      [localNotif setRepeatInterval:NSMinuteCalendarUnit];
      [application presentLocalNotificationNow:localNotif];

      str_friend = nil;
      break;
     

我得到了解决方案。