UILocalNotification应该在每个工作日重复,但周末也会发生火灾

Question

我有一个UILocalNotification应该每周一次,周一到周五开火,但不是在周末.我认为将通知的repeatInterval属性设置为NSWeekdayCalendarUnit可以实现此目的.可悲的是,我的通知仍在周末开火.谁有人建议为什么？这是我的代码:

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

localNotification.alertAction = @"View";
localNotification.alertBody = NSLocalizedString(@"ALERT_MESSAGE", nil);
localNotification.soundName = UILocalNotificationDefaultSoundName;

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MM-dd-yyyy HH:mm"];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"America/Toronto"]];

// Notification fire times are set by creating a notification whose fire date 
// is an arbitrary weekday at the correct time, and having it repeat every weekday
NSDate *fireDate = [dateFormatter dateFromString:@"01-04-2012 11:00"]; 

localNotification.fireDate = fireDate;
localNotification.repeatInterval = NSWeekdayCalendarUnit;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
            break;

[localNotification release];

Answer 1

iOS中的工作日只意味着一周内的一天.与周末相比,它没有"工作周"的内涵.

通过建议您使用1-7作为单位,文档说它更清楚一点:

NSWeekdayCalendarUnit

指定工作日单位.

对应的值是kCFCalendarUnitSecond.等于kCFCalendarUnitWeekday.工作日单位是数字1到N(其中公历N = 7,1表示星期日).

资料来源:http://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSCalendar_Class/Reference/NSCalendar.html

要从周一到周五正确设置通知,这里有一些框架代码.你将不得不执行5次,所以将它封装在fireDate参数的方法中是很好的.我已经展示了如何在星期一这样做.

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

// Set this to an NSDate that is for the time you want, on Monday
notification.fireDate = fireDate;            

// Repeat every week
notification.repeatInterval = NSWeekCalendarUnit;

Answer 2

您必须分别为本地通知设置日期,并将本地通知repeatInterval设置为NSWeekCalendar单元.如

            [self notificationWithItem:tempDict Date:[self SetDateForAlarmWithWeekday:2 :tempDict] andRepeatInterval:NSWeekCalendarUnit];
            [self notificationWithItem:tempDict Date:[self SetDateForAlarmWithWeekday:3 :tempDict]andRepeatInterval:NSWeekCalendarUnit];
            [self notificationWithItem:tempDict Date:[self SetDateForAlarmWithWeekday:4 :tempDict] andRepeatInterval:NSWeekCalendarUnit];
            [self notificationWithItem:tempDict Date:[self SetDateForAlarmWithWeekday:5 :tempDict] andRepeatInterval:NSWeekCalendarUnit];
            [self notificationWithItem:tempDict Date:[self SetDateForAlarmWithWeekday:6 :tempDict] andRepeatInterval:NSWeekCalendarUnit];

这里我创建了方法setDateForAlarmWithWeekday,它返回在本地Notification的fireDate属性和设置Local Notification的notificationWithItem中设置的日期.

-(void) notificationWithItem:(NSDictionary*)tmpdict Date:(NSDate *)date andRepeatInterval:(NSCalendarUnit)CalUnit
{
    UILocalNotification *localNotification =[[UILocalNotification alloc]init];

    if (localNotification==nil) {
        return;
    }

    localNotification.fireDate=date;
    localNotification.timeZone=[NSTimeZone defaultTimeZone];
    localNotification.repeatCalendar=[NSCalendar currentCalendar];
    localNotification.alertBody=[NSString stringWithFormat:@"%@",[tmpdict objectForKey:@"Reminder"]];

    NSDictionary *snoozeDic=[tmpdict objectForKey:@"Snooze"];
    if ([[snoozeDic valueForKey:@"Switch"]intValue]==1) {
        localNotification.alertAction=@"Snooze";
    }else
    {
        localNotification.hasAction=NO;
    }

    localNotification.repeatInterval=CalUnit;
    localNotification.soundName=[NSString stringWithFormat:@"%@.caf",[tmpdict objectForKey:@"Tone"]];
    localNotification.userInfo=[NSDictionary dictionaryWithObject:tmpdict forKey:@"AlarmInfo"];
    localNotification.applicationIconBadgeNumber=1;

    [[UIApplication sharedApplication]scheduleLocalNotification:localNotification];

}


-(NSDate*)SetDateForAlarmWithWeekday:(int)WeekDay:(NSDictionary*)dics
{
    NSLog(@"set date for alarm called");
    NSCalendar *calendar=[NSCalendar currentCalendar];
    [calendar setTimeZone:[NSTimeZone defaultTimeZone]];

    unsigned currentFlag=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit|NSWeekdayCalendarUnit;

    NSDateComponents *comp=[calendar components:currentFlag fromDate:[NSDate date]];

    NSArray *array=[[dics objectForKey:@"Time"] componentsSeparatedByString:@" "];
    NSInteger hour=[[[[array objectAtIndex:0] componentsSeparatedByString:@":"] objectAtIndex:0] intValue];
    NSInteger min=[[[[array objectAtIndex:0] componentsSeparatedByString:@":"] objectAtIndex:1] intValue];

    if ([[array objectAtIndex:1] isEqualToString:@"PM"]) {
        hour=hour+12;
    }
    else
    {
        if (hour==12) {
            hour=0;
        }
    }

    comp.hour=hour;
    comp.minute=min;
    comp.second=0;

    NSLog(@"set date for alarm (%i:%i:%i)",comp.hour,comp.minute,comp.second);
    NSLog(@"weekday :%i ",WeekDay);
    NSLog(@"comp weekday %i",comp.weekday);
    int diff=(WeekDay-comp.weekday);
    NSLog(@"difference :%i",diff);

    int multiplier;
    if (WeekDay==0) {
     multiplier=0;
    }else
    {
     multiplier=diff>0?diff:(diff==0?diff:diff+7);
    }

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

    return [[calendar dateFromComponents:comp]dateByAddingTimeInterval:multiplier*secondsInOneDay];
}

我希望这会对你有所帮助.