Question

我正在使用本地通知。我想删除已安排的通知。我不知道在哪里编写代码。这是我的代码..

 NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];

    // Get the current date
    NSDate *pickerDate =  self.selectedDate;
    NSLog(@" self.selectedDate %@", self.selectedDate);
    // Break the date up into components
    NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit )
                                                   fromDate:pickerDate];
    NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                                   fromDate:pickerDate];

    // Set up the fire time
    NSDateComponents *dateComps = [[NSDateComponents alloc] init];
    [dateComps setDay:[dateComponents day]];
    [dateComps setMonth:[dateComponents month]];
    [dateComps setYear:[dateComponents year]];
    [dateComps setHour:[timeComponents hour]];
    // Notification will fire in one minute
    [dateComps setMinute:[timeComponents minute]];
    [dateComps setSecond:[timeComponents second]];
    NSDate *itemDate = [calendar dateFromComponents:dateComps];

    NSLog(@"itemDate %@",itemDate);
    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    if (localNotif == nil)
        return;
    localNotif.fireDate = itemDate;
      NSLog(@"itemDate %@", localNotif.fireDate);
    localNotif.timeZone = [NSTimeZone defaultTimeZone];

    // Notification details
    localNotif.alertBody = [_titleTextFieldObj text];
    // Set the action button
    localNotif.alertAction = @"View";

    localNotif.soundName = UILocalNotificationDefaultSoundName;
    localNotif.applicationIconBadgeNumber =[[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

    NSLog(@" localNotif.applicationIconBadgeNumber ++ %ld", (long)localNotif.applicationIconBadgeNumber );



    // Specify custom data for the notification
    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:[_titleTextFieldObj text] forKey:@"someKey"];
    localNotif.userInfo = infoDict;
    NSArray *notificationArray = [[UIApplication sharedApplication] scheduledLocalNotifications];
    //UILocalNotification *notif = [notificationArray objectAtIndex:indexPath.row];
    NSLog(@"notif %@",notificationArray);

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

我在这里写删除通知....

-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    application.applicationIconBadgeNumber=1;
    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;
        NSLog(@"userInfoCurrent %@",userInfoCurrent);
        NSString *uid=[NSString stringWithFormat:@"%@",[userInfoCurrent valueForKey:@"uid"]];
        NSLog(@"uid %@",uid);
        if ([uid isEqualToString:[notification.userInfo objectForKey:@"someKey"]])
        {
            //Cancelling local notification
            [app cancelLocalNotification:oneEvent];
            break;
        }
    }
    if (notification) {
        NSLog(@"notify %@",notification);
        NSString *custom=[notification.userInfo objectForKey:@"someKey"];
         NSLog(@"custom %@",custom);
         NSString *newString = [custom stringByReplacingOccurrencesOfString:@" " withString:@""];

         NSLog(@"newString %@",newString);

        NSLog(@"custmky%@",notification.description);
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Message" message:newString delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
        alert.delegate=self;
        [alert show];


    }


}

我是UILocalNotifications和Objective-c的新手。任何人都可以帮助我....

Answer 1

您可以通过将开火日期与已安排的UILocalNotifications或使用其正文进行比较来取消UILocationNotification。以消防日期取消的一个例子：

UIApplication *application = [UIApplication sharedApplication];
NSDate *dateToCancel = nil; // Set this to the date you want to cancel
for (UILocalNotification *notification in [application scheduledLocalNotifications])
{
    if (notification.fireDate == dateToCancel)
    {
        [application cancelLocalNotification:notification];
    }
}

现在，如果您有通知指针，则只需调用取消本地通知，而无需循环已安排的通知。如果需要，还可以通过键对象方法向通知添加Id标记。

Answer 2

无论代码在哪个类中，都可以使用UIApplication单例... 您可以使用以下方式取消所有通知：

[[UIApplication sharedApplication] cancelAllLocalNotifications];

如果要删除特定通知，可以使用通知对象的userinfo，在创建本地通知时为其添加唯一ID。稍后您可以使用该ID删除本地通知。

为此您可以使用以下代码：

NSString *notificationId = @"id_to_cancel";
UILocalNotification *notification = nil;
for(UILocalNotification *notify in [[UIApplication sharedApplication] scheduledLocalNotifications])
{
  if([notify.userInfo objectForKey:@"ID"] isEqualToString:notificationId ])
  {
     notification = notify;
     break;
  }
}
[[UIApplication sharedApplication] cancelLocalNotification:notification];

如何删除应用中已安排的LocalNotifications？

2 个答案: