如何将本地通知重复间隔设置为自定义时间间隔？

Question

我正在制作一个 iPhone 应用程序，它需要本地通知。

在本地通知中有 repeatInterval 属性，我们可以在其中设置分钟、小时、天、周、年等单位重复间隔。

我希望重复间隔应该为 4 小时。

因此，每4 小时就会收到一次本地通知。

我不希望用户为每个设置单独的通知。

我希望用户能够将重复间隔设置为 4 小时。

我该怎么做？

Answer 1

得到了答案，这是直接的。

您无法创建自定义重复间隔。

您必须使用 NSCalendarUnit 的内置单位时间间隔。

我尝试了上述所有解决方案，甚至尝试了其他方法，但都不起作用。

我投入了大量的时间来发现我们无法让它在自定义时间间隔内工作。

Answer 2

重复间隔只是一个具有位图常量的枚举，因此无法自定义repeatIntervals，只能是每分钟、每秒、每周等话

虽如此，您的用户没有理由必须设置每一项。如果您让他们在用户界面中设置两个值，例如“频率单位：年/月/周/小时”和“每____年/月/周/小时”然后您可以通过设置适当的触发日期自动生成适当的通知，而无需重复。

UILocalNotification *locNot = [[UILocalNotification alloc] init];
NSDate *now = [NSDate date];
NSInterval interval;
switch( freqFlag ) {     // Where freqFlag is NSHourCalendarUnit for example
    case NSHourCalendarUnit:
        interval = 60 * 60;  // One hour in seconds
        break;
    case NSDayCalendarUnit:
        interval = 24 * 60 * 60; // One day in seconds
        break;
}
if( every == 1 ) {
    locNot.fireDate = [NSDate dateWithTimeInterval: interval fromDate: now];
    locNot.repeatInterval = freqFlag;
    [[UIApplication sharedApplication] scheduleLocalNotification: locNot];
} else {
    for( int i = 1; i <= repeatCountDesired; ++i ) {
        locNot.fireDate = [NSDate dateWithTimeInterval: interval*i fromDate: now];
        [[UIApplication sharedApplication] scheduleLocalNotification: locNot];
    }
}
[locNot release];

Answer 3

我有一个想法如何做到这一点，我已经在我的项目中实现了这一点

。首先，创建带有触发日期的本地通知（例如，每分钟）。
下一步 - 使用此通知的唯一 ID 填充用户信息（如果您想将来删除它）和您的自定义周期，如下所示：

-(void) createLocalRepeatedNotificationWithId: (NSString*) Id
{

    UILocalNotification *localNotification = [[UILocalNotification alloc] init];
    NSTimeInterval your_custom_fire_interval = 60; // interval in seconds
    NSDate *remindDate = [[NSDate date] dateByAddingTimeInterval:your_custom_fire_interval];
    localNotification.fireDate = remindDate;
    localNotification.userInfo = @{@"uid":Id, @"period": [NSNumber numberWithInteger:your_custom_fire_interval]};
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}

之后，实施 -(void)application:(UIApplication *)application didReceiveLocalNotification:( AppDelegate 中的 UILocalNotification *)notification：

1. 从用户信息中获取自定义周期。
2. 更改下一个周期的开火日期

3. 只需再次将其添加到隐藏的通知中即可！

   NSInteger period = [[notification.userInfo objectForKey:@"period"] integerValue]; //1
   NSTimeInterval t= 10 * 周期；
   notification.fireDate =[[NSDate 日期] dateByAddingTimeInterval:t]; //2 
    [[UIApplication共享应用程序]scheduleLocalNotification:通知]; //3
   

如果您想删除此通知，请执行

UIApplication *app = [UIApplication sharedApplication];
NSArray *eventArray = [app scheduledLocalNotifications];
for (int i=0; i<[eventArray count]; i++)
{
    UILocalNotification* oneEvent = [eventArray objectAtIndex:i];
    NSDictionary *userInfoCurrent = oneEvent.userInfo;
    NSString *uid=[NSString stringWithFormat:@"%@",[userInfoCurrent valueForKey:@"id"]];
    if ([uid isEqualToString:notification_id_to_remove])
    {
        //Cancelling local notification
        [app cancelLocalNotification:oneEvent];
        break;
    }
}

非常重要！

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification 不要调用，当您在背景。因此，您必须设置长时间运行的后台任务，您将在其中再次创建通知。

Answer 4

我已经使用了这段代码，并且它可以很好地重复 LocalNotification 我已经使用 LavaSlider 代码来实现此代码

     UILocalNotification *    localNotifEndCycle = [[UILocalNotification alloc] init];
      localNotifEndCycle.alertBody = @"Your Expected Date ";
      NSDate *now = [NSDate date];

      for( int i = 1; i <= 10;i++) 
     {
        localNotifEndCycle.alertBody = @"Your Expected Date ";
        localNotifEndCycle.soundName=@"best_guitar_tone.mp3";
        localNotifEndCycle.fireDate = [NSDate dateWithTimeInterval:180*i sinceDate:now];
        [[UIApplication sharedApplication] scheduleLocalNotification: localNotifEndCycle];
     }
     }

Answer 5

-(void)schedulenotificationfortimeinterval:(NSString *)id1
{
    NSLog(@"selected value %d",selectedvalue);

    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    [formatter setDateFormat:@"MMM dd,yyyy hh:mm a"];

    UILocalNotification *localNotification2 = [[UILocalNotification alloc] init];


   // localNotification2. fireDate = [[formatter dateFromString:[NSString stringWithFormat:@"%@ %@",[MedicationDict  valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]]] dateByAddingTimeInterval:0];

    if(selectedvalue==0)
    {
        NSLog(@"dk 0000");

        localNotification2.fireDate = [formatter dateFromString:[NSString stringWithFormat:@"%@ %@",[MedicationDict  valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]]] ;//now

        localNotification2.applicationIconBadgeNumber = 1;

        localNotification2.repeatInterval=NSDayCalendarUnit;

    }
    if(selectedvalue==1)
    {
        NSLog(@"dk 1111");

        for( int u = 0; u <= 2 ;u++)
        {
        localNotification2.fireDate = [[formatter dateFromString:[NSString stringWithFormat:@"%@ %@",[MedicationDict  valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]]] dateByAddingTimeInterval:43200.0*u] ;// 12 hr 
            localNotification2.repeatInterval=NSDayCalendarUnit;

            localNotification2.alertBody = [NSString stringWithFormat:@"Friendly reminder to take %@ %@ at %@.",[MedicationDict objectForKey:@"DrugName"],[MedicationDict objectForKey:@"Frequency"],[MedicationDict objectForKey:@"Ending"]];

            localNotification2.alertAction = @"Notification";
            localNotification2.soundName=UILocalNotificationDefaultSoundName;
            localNotification2.applicationIconBadgeNumber = 2;


            [[UIApplication sharedApplication] scheduleLocalNotification:localNotification2];

            NSLog(@"all notifications %@",[[UIApplication sharedApplication]scheduledLocalNotifications]);

        }

     //  localNotification2.repeatInterval=NSDayCalendarUnit;

     }

    if(selectedvalue==2)
    {
        NSLog(@"dk 22222");
        for( int u = 0; u <= 3 ;u++)
        {
            localNotification2.fireDate = [[formatter dateFromString:[NSString stringWithFormat:@"%@ %@",[MedicationDict  valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]]] dateByAddingTimeInterval:28800.0*u] ;//8 hr 
            localNotification2.repeatInterval=NSDayCalendarUnit;

            localNotification2.alertBody = [NSString stringWithFormat:@"Friendly reminder to take %@ %@ at %@.",[MedicationDict objectForKey:@"DrugName"],[MedicationDict objectForKey:@"Frequency"],[MedicationDict objectForKey:@"Ending"]];

            localNotification2.alertAction = @"Notification";
            localNotification2.soundName=UILocalNotificationDefaultSoundName;
            localNotification2.applicationIconBadgeNumber = 3;


            [[UIApplication sharedApplication] scheduleLocalNotification:localNotification2];

            NSLog(@"all notifications %@",[[UIApplication sharedApplication]scheduledLocalNotifications]);

        }


      //  localNotification2.repeatInterval=NSDayCalendarUnit;
    }

    if(selectedvalue==3)
    {
       NSLog(@"dk 3333");
        for( int u = 0; u <= 4 ;u++)
        {
            localNotification2.fireDate = [[formatter dateFromString:[NSString stringWithFormat:@"%@ %@",[MedicationDict  valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]]] dateByAddingTimeInterval:21600.0*u] ;//6 hr
            localNotification2.repeatInterval=NSDayCalendarUnit;

            localNotification2.alertBody = [NSString stringWithFormat:@"Friendly reminder to take %@ %@ at %@.",[MedicationDict objectForKey:@"DrugName"],[MedicationDict objectForKey:@"Frequency"],[MedicationDict objectForKey:@"Ending"]];

            localNotification2.alertAction = @"Notification";
            localNotification2.soundName=UILocalNotificationDefaultSoundName;
            localNotification2.applicationIconBadgeNumber = 4;


            [[UIApplication sharedApplication] scheduleLocalNotification:localNotification2];

            NSLog(@"all notifications %@",[[UIApplication sharedApplication]scheduledLocalNotifications]);

        }


      //  localNotification2.repeatInterval=NSDayCalendarUnit;
   }  
 //   localNotification2.repeatInterval=NSDayCalendarUnit;

    NSLog(@"date is %@ %@",[MedicationDict valueForKey:@"Starting"],[MedicationDict valueForKey:@"Ending"]);

    localNotification2.timeZone = [NSTimeZone localTimeZone];


     localNotification2.alertBody = [NSString stringWithFormat:@"Friendly reminder to take %@ %@ at %@.",[MedicationDict objectForKey:@"DrugName"],[MedicationDict objectForKey:@"Frequency"],[MedicationDict objectForKey:@"Ending"]];

    localNotification2.alertAction = @"Notification";
    localNotification2.soundName=UILocalNotificationDefaultSoundName;
    //localNotification2.applicationIconBadgeNumber = 1;

  //  infoDict = [NSDictionary dictionaryWithObject:id1 forKey:@"did"];

  //  localNotification2.userInfo = infoDict;

  //  [[UIApplication sharedApplication] scheduleLocalNotification:localNotification2];

 //   NSLog(@"all notifications %@",[[UIApplication sharedApplication]scheduledLocalNotifications]);

   // [[UIApplication sharedApplication] cancelAllLocalNotifications];//dk
 }

Answer 6

如果您为每次想要触发通知的时间设置单独的通知，则可以设置所需的任何时间间隔。然后，您必须管理它们，如果您当前不是允许在后台运行的应用程序，则必须通过让用户运行您的应用程序来刷新它们。完成此任务后，我可以告诉您这是一个主要的 PITA。

Answer 7

//This is how I set local notification based on time interval repeatedly and executed method customized snooze and delete
let content = UNMutableNotificationContent()
content.title = "Time Based Local Notification"
content.subtitle = "Its is a demo"
content.sound = .default
content.categoryIdentifier = "UYLReminderCategory"

//repition of time base local notification in foreground, background, killed
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
let request = UNNotificationRequest(identifier: "IOS Demo", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
let snoozeAction = UNNotificationAction(identifier: "Snooze", title: "Snooze", options: [])
let deleteAction = UNNotificationAction(identifier: "UYLDeleteAction", title: "Delete", options: [.destructive])
let cat = UNNotificationCategory(identifier: "UYLReminderCategory", actions: [snoozeAction,deleteAction], intentIdentifiers: [], options: [])
UNUserNotificationCenter.current().setNotificationCategories([cat])

Answer 8

notif.repeatInterval = NSDayCalendarUnit;