Question

我不明白为什么LocalNotification能够与NSHourCalendarUnit完美配合，但永远不会使用NSWeekCalendarUnit和NSDayCalendarUnit，尽管它会在日志中显示正确的时间!!当设置weekday我需要它时，必须有一些我遗漏的东西..它会是什么？

请查看日志出来的代码，以便指导我正在做的错误：

-(void) Monday {   // 9th Notification Every 1:35

NSCalendar *calendar = [NSCalendar currentCalendar];
calendar.timeZone = [NSTimeZone timeZoneWithName:@"GMT"];

NSDateComponents *components = [calendar components: NSDayCalendarUnit | NSYearCalendarUnit | NSWeekCalendarUnit fromDate:[NSDate date]];

components.weekday = 2;
components.hour   = 10;
components.minute = 56;
components.second = 35;

NSDate *fire = [calendar dateFromComponents:components];
NSLog(@"The Fire Day is:: %@", fire);


UILocalNotification *notif = [[UILocalNotification alloc]  init] ;
if (notif == nil)
    return;

notif.fireDate = fire;
notif.repeatInterval= NSWeekCalendarUnit ;
notif.soundName = @"ring.wav";
notif.alertBody = [NSString stringWithFormat: @"THANKS for Your HELP :)"] ;
[[UIApplication sharedApplication] scheduleLocalNotification:notif] ;

NSLog(@"*****NEW LOG Notification Details*****%@", notif);
}

这是日志：

2014-01-20 10:09:12.935 daily notification test[17591:c07] The Fire Day is:: 2014-01-20 10:10:35 +0000

* 日志更新： *

2014-01-20 10:56:21.694 daily notification test[17823:c07] The Fire Day is:: 2014-01-20 10:56:35 +0000
2014-01-20 10:56:21.697 daily notification test[17823:c07] *****NEW LOG Notification Details*****<UIConcreteLocalNotification: 0x7180360>{fire date = Monday, January 20, 2014, 11:56:35 AM Central European Standard Time, time zone = (null), repeat interval = NSWeekCalendarUnit, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Monday, January 20, 2014, 11:56:35 AM Central European Standard Time, user info = (null)}
.

2014-01-20 10：56：21.694每日通知测试[17823：c07]消防日是:: 2014-01-20 10:56:35 +0000 2014-01-20 10：56：21.697每日通知测试[17823：c07] ** 新日志通知详情 ** {开火日期= 2014年1月20日星期一，11：56：35 AM中欧时间标准时间，时区=（null），重复间隔= NSWeekCalendarUnit，重复计数= UILocalNotificationInfiniteRepeatCount，下次开火日期= 2014年1月20日星期一，上午11:56:35中欧时间标准时间，用户信息=（null）}

Answer 1

只需替换

notif.repeatInterval= NSHourCalendarUnit ;

带

notif.repeatInterval= NSWeekCalendarUnit;

已编辑

现在试试这个，这可能有帮助

NSCalendar *gregorian1 = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
        [gregorian1 setLocale:[NSLocale currentLocale]];

        NSDateComponents *nowComponents = [gregorian1 components:NSYearCalendarUnit | NSWeekCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:[NSDate new]];

        [nowComponents setWeekday:2]; //Monday
       [nowComponents setWeek: [nowComponents week] + 1]; //Next week
        [nowComponents setHour:8]; //8a.m.
       [nowComponents setMinute:0];
        [nowComponents setSecond:0];

        NSDate *beginningOfWeek = [gregorian1 dateFromComponents:nowComponents];

Answer 2

您无法在weekday中设置NSDateComponents而无需调整day 因此。这个计算应该有效：

NSInteger wantedWeekday = 2; // Monday
NSDateComponents *components = [calendar components: NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit | NSWeekdayCalendarUnit
                       fromDate:[NSDate date]];

components.day += wantedWeekday - components.weekday;
components.weekday = wantedWeekday;
components.hour   = 8;
components.minute = 10;
components.second = 35;
NSDate *fire = [calendar dateFromComponents:components];

这会计算上一个或下一个星期一的日期，但事实并非如此物。如果fire过去，UILocalNotification将自动更正。

备注： NSLog(@"%@", aNotification)显示计算的下一个开火日期 UILocalNotification。这有助于诊断问题。

为什么Notification适用于NSHourCalendarUnit但不适用于NSWeekCalendarUnit？

2 个答案: