如何在ios中管理多个本地通知？

Question

I have a multiple local notification which repeat every minutes.when local notification are arrive then i update the database.It's Work fine. But when we set multiple notification then It's fire time is Same.so both local notification simultaneously execute at same time.* This situation into my database update is not work properly.means first value reference data are updated *

//below set notification.

   AlarmNotification = [[UILocalNotification alloc]init];
   // AlarmNotification.fireDate = SetAlarmTime;
    AlarmNotification.fireDate = AddMinutes;
    AlarmNotification.repeatInterval = NSMinuteCalendarUnit; 
    AlarmNotification.alertBody =cloclListInsert.labelText;
    AlarmNotification.timeZone  = [NSTimeZone defaultTimeZone];
    AlarmNotification.soundName =cloclListInsert.SelctAlaemToneDbStr;


    NSMutableDictionary *userDict = [[NSMutableDictionary alloc] init];
    NSString *ClockIDStr = [NSString stringWithFormat:@"%i",cloclListInsert.ClockIDvalue];

    [userDict setObject:ClockIDStr forKey:@"ClockID"];

    AlarmNotification.userInfo = userDict;
    [[UIApplication sharedApplication]scheduleLocalNotification:AlarmNotification];

delegate method in App Delegate

 - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
 {
    NSLog(@"notification.userInfo : %@",notification.userInfo);

    NSString *SelectID= [notification.userInfo objectForKey:@"ClockID"];
    NSLog(@"SelectID is : %@",SelectID);

    NSLog(@"notification.userInfo : %@",notification.userInfo);
    NotificationId = [SelectID integerValue];


    NSLog(@"NotificationId is : %i",NotificationId);
    clocklistobj.ClockIDvalue = NotificationId;

    if ([sqldbobj getNotificationClockList:clocklistobj]) {

        NotificationCount = clocklistobj.incrementTag;

        NSLog(@"NotificationCount : %i",NotificationCount);

        clocklistobj.incrementTag =NotificationCount +1;

        //insert increment tag in counter variable

        counter = clocklistobj.incrementTag;
        NSLog(@"counter when receive notification in delegate method: %i",counter);

        NSLog(@"NotificationCount +1 & clocklistobj.incrementTag : %i",clocklistobj.incrementTag);

        //set brightness of device
        SetBrightnessValue = (float) (clocklistobj.incrementTag *0.066666);   
        NSLog(@"SetBrightnessValue : %f",SetBrightnessValue);
        [[UIScreen mainScreen] setBrightness:SetBrightnessValue];

        //set music player & control volume

        setPlayerVolume = (float) (clocklistobj.incrementTag *0.066666);

        NSLog(@"set Player Volume : %f",setPlayerVolume);

        [audioPlayer setVolume:setPlayerVolume];

        //below start playing audio

        [audioPlayer play];

        //update database

        [sqldbobj UpdateNotificationCount:clocklistobj];
        NSLog(@" After update clocklistobj.incrementTag:%i",clocklistobj.incrementTag);

        if (clocklistobj.incrementTag ==15 || clocklistobj.incrementTag >15) {
            NSLog(@"Notification reach at limit");
            UIApplication *app = [UIApplication sharedApplication];
            NSArray *eventArray = [app scheduledLocalNotifications];

            // NSLog(@"eventArray : %@",eventArray);

            for (int i=0; i<[eventArray count]; i++)
            {
                UILocalNotification* oneEvent = [eventArray objectAtIndex:i];
                NSDictionary *userInfoCurrent = oneEvent.userInfo;
            NSString *uid=[NSString stringWithFormat:@"%@",[userInfoCurrent valueForKey:@"ClockID"]];
                NSInteger GetUid = [uid integerValue];

                //here we cancell the particular notification
            NSLog(@"Application is stoped clocklistobj.ClockIDvalue : %i", clocklistobj.ClockIDvalue);

                if (GetUid ==clocklistobj.ClockIDvalue)
                {
                    clocklistobj.soundisON = 0;
                    [sqldbobj UpdateAfteNotificationSwitchMakeOff:clocklistobj];

                    //Cancelling local notification
                    [app cancelLocalNotification:oneEvent];
                    break;

                }
            }
    }else {
        NSLog(@"Notification is off");
    }
    }
 }

Answer 1

Ok so what you can do is you can restrict the user from setting multiple alarm at the same time.

For doing so you have to call [[UIApplication sharedApplication] scheduledLocalNotifications] , it will provide you all the notifications scheduled till now.

Then you can go through these notification and check for the notification.fireDate if it matches your current scheduling fireDate then you can show an alert to user by saying that 'There is another alarm scheduled at the same time.'.