ios 本地推送的添加和取消

//取消

- (void)shutdownClock:(int)clockID

{
    NSArray *localNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
    for(UILocalNotification *notification in localNotifications)
    {
       
      

        if ([[[notification userInfo] objectForKey:@"ActivityClock"] intValue] == clockID) {
            NSLog(@"Shutdown localNotification:%@", [notification fireDate]);
            [[UIApplication sharedApplication] cancelLocalNotification:notification];
        }
    }
}

//添加

- (void)addClock:(int)clockID（时间） body:(NSString *)name（文字）
{
    UILocalNotification *notif1 = [[UILocalNotification alloc] init];
    notif1.fireDate = [NSDate dateWithTimeIntervalSinceNow:clockID];
    notif1.soundName = UILocalNotificationDefaultSoundName;
    notif1.alertBody = [NSString stringWithFormat:name];
    //显示在icon上的红色圈中的数子
    notif1.applicationIconBadgeNumber = 1;
    //设置userinfo 方便在之后需要撤销的时候使用
      NSString *strnum=[NSString stringWithFormat:@"%i",clockID];
    NSDictionary *info = [NSDictionary dictionaryWithObject:strnum forKey:@"ActivityClock"];
    notif1.userInfo = info;
    
    [[UIApplication sharedApplication] scheduleLocalNotification:notif1];
    [notif1 release];
}

时间的计算方法

   NSDate* now = [NSDate date];
        NSCalendar *gregorian = [[NSCalendar alloc]
                                 initWithCalendarIdentifier:NSGregorianCalendar];
        NSDateComponents *dateComponents = [gregorian components:(NSHourCalendarUnit  
                                                                  | NSMinuteCalendarUnit
                                                                  | NSSecondCalendarUnit
                                                                  ) fromDate:now];
        [gregorian release];
        //当前的"小时"
        NSInteger currentHour = [dateComponents hour];
        NSInteger currentMin = [dateComponents minute];
        
        //当前“分钟”
        //24小时和闹钟时间的计算
        int currentTotal = currentHour*3600 + currentMin * 60;
        int alarmTotal = hour * 3600 + min *60;
        ontimer = alarmTotal - currentTotal;
ontimer就是得到的时间,传给方法就可以了