删除特定的本地通知

如何解决删除特定的本地通知

| 我正在开发基于本地通知的iPhone警报应用程序。删除警报时，相关的本地通知应被取消。但是，如何确定要从本地通知数组中取消的对象呢？我知道[[UIApplication sharedApplication] cancellocalnotification:notification]方法，但是如何获取此'notification \'来取消呢？

解决方法

您可以在本地通知的用户信息中保存密钥的唯一值。获取所有本地通知，遍历数组并删除特定通知。代码如下， OBJ-C：

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:@\"uid\"]];
    if ([uid isEqualToString:uidtodelete])
    {
        //Cancelling local notification
        [app cancelLocalNotification:oneEvent];
        break;
    }
}

迅速：

var app:UIApplication = UIApplication.sharedApplication()
for oneEvent in app.scheduledLocalNotifications {
    var notification = oneEvent as UILocalNotification
    let userInfoCurrent = notification.userInfo! as [String:AnyObject]
    let uid = userInfoCurrent[\"uid\"]! as String
    if uid == uidtodelete {
        //Cancelling local notification
        app.cancelLocalNotification(notification)
        break;
    }
}

用户通知：如果您使用UserNotification（iOS 10+），请按照以下步骤操作：创建UserNotification内容时，添加唯一标识符使用removePendingNotificationRequests（withIdentifiers :)删除特定的待处理通知使用removeDeliveredNotifications（withIdentifiers :)删除特定的已交付通知有关更多信息，请访问UNUserNotificationCenter , 其他选择：首先，创建本地通知时，可以将其存储在用户默认值中以备将来使用，不能将本地通知对象直接存储在用户默认值中，需要先将该对象转换为NSData对象，然后才能存储“ 3” User defaults以下是该代码：

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:localNotif];
[[NSUserDefaults standardUserDefaults] setObject:data forKey:[NSString  stringWithFormat:@\"%d\",indexPath.row]];

在存储并安排了本地通知之后，将来可能会需要您取消以前创建的任何通知，因此可以从“用户默认值”中检索它。

NSData *data= [[NSUserDefaults standardUserDefaults] objectForKey:[NSString   stringWithFormat:@\"%d\",UniqueKey]];

UILocalNotification *localNotif = [NSKeyedUnarchiver unarchiveObjectWithData:data];
NSLog(@\"Remove localnotification  are %@\",localNotif);
[[UIApplication sharedApplication] cancelLocalNotification:localNotif];
[[NSUserDefaults standardUserDefaults] removeObjectForKey:[NSString stringWithFormat:@\"%d\",UniqueKey]];

希望这可以帮助 , 这是我的工作。创建通知时，请执行以下操作：

  // Create the notification

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



notification.fireDate = alertDate;
notification.timeZone = [NSTimeZone localTimeZone] ;
notification.alertAction = NSLocalizedString(@\"Start\",@\"Start\");
notification.alertBody = **notificationTitle**;
notification.repeatInterval= NSMinuteCalendarUnit;

notification.soundName=UILocalNotificationDefaultSoundName;
notification.applicationIconBadgeNumber = 1;

[[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

尝试删除它时，请执行以下操作：

 NSArray *arrayOfLocalNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications] ;

for (UILocalNotification *localNotification in arrayOfLocalNotifications) {

    if ([localNotification.alertBody isEqualToString:savedTitle]) {
        NSLog(@\"the notification this is canceld is %@\",localNotification.alertBody);

        [[UIApplication sharedApplication] cancelLocalNotification:localNotification] ; // delete the notification from the system

    }

}

此解决方案应适用于多个通知，并且您不管理任何数组或字典或用户默认设置。您只需使用已经保存到系统通知数据库中的数据即可。希望这对将来的设计师和开发人员有所帮助。编码专家们，大家好！：D , 快速调度和removeNotification：

    static func scheduleNotification(notificationTitle:String,objectId:String) {

    var localNotification = UILocalNotification()
    localNotification.fireDate = NSDate(timeIntervalSinceNow: 24*60*60)
    localNotification.alertBody = notificationTitle
    localNotification.timeZone = NSTimeZone.defaultTimeZone()
    localNotification.applicationIconBadgeNumber = 1
    //play a sound
    localNotification.soundName = UILocalNotificationDefaultSoundName;
    localNotification.alertAction = \"View\"
    var infoDict :  Dictionary<String,String!> = [\"objectId\" : objectId]
    localNotification.userInfo = infoDict;

    UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}
    static func removeNotification(objectId:String) {
    var app:UIApplication = UIApplication.sharedApplication()

    for event in app.scheduledLocalNotifications {
        var notification = event as! UILocalNotification
        var userInfo:Dictionary<String,String!> = notification.userInfo as! Dictionary<String,String!>
        var infoDict :  Dictionary = notification.userInfo as! Dictionary<String,String!>
        var notifcationObjectId : String = infoDict[\"objectId\"]!

        if notifcationObjectId == objectId {
            app.cancelLocalNotification(notification)
        }
    }



}

, iMOBDEV的解决方案可以完美地删除特定的通知（例如，删除警报后），但是当您需要有选择地删除任何已触发但仍在通知中心的通知时，它特别有用。可能的情况是：触发警报通知，但是用户打开应用程序时没有点击该通知并再次安排该警报。如果要确保给定项目/警报的通知中心只能显示一个通知，这是一个很好的方法。它还使您不必每次打开应用程序时都清除所有通知，以更好地适应该应用程序。创建本地通知后，请使用NSKeyedArchiver将其存储为Data中的Data。您可以创建一个与您在通知的userInfo词典中保存的密钥相同的密钥。如果它与Core Data对象关联，则可以使用其唯一的objectID属性。用NSKeyedUnarchiver检索。现在，您可以使用cancelLocalNotification方法将其删除。相应地更新ѭ12上的键。这是该解决方案的Swift 3.1版本（适用于iOS 10以下的目标）：商店

// localNotification is the UILocalNotification you\'ve just set up
UIApplication.shared.scheduleLocalNotification(localNotification)
let notificationData = NSKeyedArchiver.archivedData(withRootObject: localNotification)
UserDefaults.standard.set(notificationData,forKey: \"someKeyChosenByYou\")

检索并删除

let userDefaults = UserDefaults.standard
if let existingNotificationData = userDefaults.object(forKey: \"someKeyChosenByYou\") as? Data,let existingNotification = NSKeyedUnarchiver.unarchiveObject(with: existingNotificationData) as? UILocalNotification {

    // Cancel notification if scheduled,delete it from notification center if already delivered    
    UIApplication.shared.cancelLocalNotification(existingNotification)

    // Clean up
    userDefaults.removeObject(forKey: \"someKeyChosenByYou\")
}

, Swift版本，如果需要：

func cancelLocalNotification(UNIQUE_ID: String){

        var notifyCancel = UILocalNotification()
        var notifyArray = UIApplication.sharedApplication().scheduledLocalNotifications

        for notifyCancel in notifyArray as! [UILocalNotification]{

            let info: [String: String] = notifyCancel.userInfo as! [String: String]

            if info[uniqueId] == uniqueId{

                UIApplication.sharedApplication().cancelLocalNotification(notifyCancel)
            }else{

                println(\"No Local Notification Found!\")
            }
        }
    }

, Swift 4解决方案：

UNUserNotificationCenter.current().getPendingNotificationRequests { (requests) in
  for request in requests {
    if request.identifier == \"identifier\" {
      UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [\"identifier\"])
    }
  }
}

, 传递给“ 19”的UILocalNotification对象将匹配具有匹配属性的任何现有UILocalNotification对象。所以：

UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.alertBody = @\"foo\";
[[UIApplication sharedApplication] presentLocalNotificationNow:notification];

将显示本地通知，以后可以通过以下方式取消：

UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.alertBody = @\"foo\";
[[UIApplication sharedApplication] cancelLocalNotification:notification];

, 我在Swift 2.0中使用以下功能：

  static func DeleteNotificationByUUID(uidToDelete: String) -> Bool {
    let app:UIApplication = UIApplication.sharedApplication()
    // loop on all the current schedualed notifications
    for schedualedNotif in app.scheduledLocalNotifications! {
      let notification = schedualedNotif as UILocalNotification
      let urrentUi = notification.userInfo! as! [String:AnyObject]
      let currentUid = urrentUi[\"uid\"]! as! String
      if currentUid == uidToDelete {
        app.cancelLocalNotification(notification)
        return true
      }
    }
    return false
  }

灵感来自@ KingofBliss's Answer , 安排通知时，您可以保留带有类别标识符的字符串，如下所示

        localNotification.category = NotificationHelper.categoryIdentifier

并搜索它，并在需要时取消，就像这样

let  app = UIApplication.sharedApplication()

    for notification in app.scheduledLocalNotifications! {
        if let cat = notification.category{
            if cat==NotificationHelper.categoryIdentifier {
                app.cancelLocalNotification(notification)
                break
            }

        }
    }

, 对于重复提醒（例如，您希望您的警报在下午4点在Sun，Sat和Wed处触发，那么您必须发出3次警报，并将repeatInterval设置为NSWeekCalendarUnit）。对于仅一次提醒：

UILocalNotification *aNotification = [[UILocalNotification alloc] init];
                aNotification.timeZone = [NSTimeZone defaultTimeZone];
                aNotification.alertBody = _reminderTitle.text;
                aNotification.alertAction = @\"Show me!\";
                aNotification.soundName = UILocalNotificationDefaultSoundName;
                aNotification.applicationIconBadgeNumber += 1;

                NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
                NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit | NSWeekCalendarUnit|  NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: _reminderDate];

                [componentsForFireDate setHour: [componentsForFireDate hour]] ; //for fixing 8PM hour
                [componentsForFireDate setMinute:[componentsForFireDate minute]];

                [componentsForFireDate setSecond:0] ;
                NSDate *fireDateOfNotification = [calendar dateFromComponents: componentsForFireDate];
                aNotification.fireDate = fireDateOfNotification;
                NSDictionary *infoDict = [NSDictionary dictionaryWithObject:_reminderTitle.text forKey:kRemindMeNotificationDataKey];
                aNotification.userInfo = infoDict;

                [[UIApplication sharedApplication] scheduleLocalNotification:aNotification];

对于重复提醒：

for (int i = 0 ; i <reminderDaysArr.count; i++)
                {

                    UILocalNotification *aNotification = [[UILocalNotification alloc] init];
                    aNotification.timeZone = [NSTimeZone defaultTimeZone];
                    aNotification.alertBody = _reminderTitle.text;
                    aNotification.alertAction = @\"Show me!\";
                    aNotification.soundName = UILocalNotificationDefaultSoundName;
                    aNotification.applicationIconBadgeNumber += 1;

                    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
                    NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit | NSWeekCalendarUnit|  NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: _reminderDate];


                    [componentsForFireDate setWeekday: [[reminderDaysArr objectAtIndex:i]integerValue]];

                    [componentsForFireDate setHour: [componentsForFireDate hour]] ; // Setup Your Own Time.
                    [componentsForFireDate setMinute:[componentsForFireDate minute]];

                    [componentsForFireDate setSecond:0] ;
                    NSDate *fireDateOfNotification = [calendar dateFromComponents: componentsForFireDate];
                    aNotification.fireDate = fireDateOfNotification;
                    aNotification.repeatInterval = NSWeekCalendarUnit;
                    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:_reminderTitle.text forKey:kRemindMeNotificationDataKey];
                    aNotification.userInfo = infoDict;

                    [[UIApplication sharedApplication] scheduleLocalNotification:aNotification];
                }
            }

对于筛选，您可以显示数组。

-(void)filterNotficationsArray:(NSMutableArray*) notificationArray{

    _dataArray = [[NSMutableArray alloc]initWithArray:[[UIApplication sharedApplication] scheduledLocalNotifications]];
    NSMutableArray *uniqueArray = [NSMutableArray array];
    NSMutableSet *names = [NSMutableSet set];

    for (int i = 0 ; i<_dataArray.count; i++) {
        UILocalNotification *localNotification = [_dataArray objectAtIndex:i];
        NSString * infoDict = [localNotification.userInfo objectForKey:@\"kRemindMeNotificationDataKey\"];

        if (![names containsObject:infoDict]) {
            [uniqueArray addObject:localNotification];
            [names addObject:infoDict];
        }
    }
    _dataArray = uniqueArray;
}

要删除“提醒”，即使是“仅一次”或“重复”：

- (void) removereminder:(UILocalNotification*)notification
{
    _dataArray = [[NSMutableArray alloc]initWithArray:[[UIApplication sharedApplication]scheduledLocalNotifications]];

    NSString * idToDelete = [notification.userInfo objectForKey:@\"kRemindMeNotificationDataKey\"];
    for (int i = 0 ; i<_dataArray.count; i++)
    {
        UILocalNotification *currentLocalNotification = [_dataArray objectAtIndex:i];
        NSString * notificationId = [currentLocalNotification.userInfo objectForKey:@\"kRemindMeNotificationDataKey\"];

        if ([notificationId isEqualToString:idToDelete])
            [[UIApplication sharedApplication]cancelLocalNotification:currentLocalNotification];
    }

    _dataArray = [[NSMutableArray alloc]initWithArray:[[UIApplication sharedApplication]scheduledLocalNotifications]];
    [self filterNotficationsArray:_dataArray];
    [_remindersTV reloadData];

}

,我稍微扩展了KingofBliss的答案，使它更加类似于Swift2，删除了一些不必要的代码，并添加了一些崩溃防护。首先，在创建通知时，您需要确保设置通知的userInfo的uid（或任何自定义属性）：

notification.userInfo = [\"uid\": uniqueid]

然后，在删除它时，您可以执行以下操作：

guard
    let app: UIApplication = UIApplication.sharedApplication(),let notifications = app.scheduledLocalNotifications else { return }
for notification in notifications {
    if
        let userInfo = notification.userInfo,let uid: String = userInfo[\"uid\"] as? String where uid == uidtodelete {
            app.cancelLocalNotification(notification)
            print(\"Deleted local notification for \'\\(uidtodelete)\'\")
    }
}

, 迅捷3样式：

final private func cancelLocalNotificationsIfIOS9(){


//UIApplication.shared.cancelAllLocalNotifications()
let app = UIApplication.shared
guard let notifs = app.scheduledLocalNotifications else{
    return
}

for oneEvent in notifs {
    let notification = oneEvent as UILocalNotification
    if let userInfoCurrent = notification.userInfo as? [String:AnyObject],let uid = userInfoCurrent[\"uid\"] as? String{
        if uid == uidtodelete {
            //Cancelling local notification
            app.cancelLocalNotification(notification)
            break;
        }
    }
}

} 对于iOS 10使用：

    let center = UNUserNotificationCenter.current()
    center.removePendingNotificationRequests(withIdentifiers: [uidtodelete])

删除特定的本地通知

如何解决删除特定的本地通知

解决方法

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