Question

我想在每个星期天晚上8点触发UILocalNotification，但是，我每天晚上8点都会有一个开火日期。

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDate *now = [NSDate date];
    NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit |   NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: now];
    [componentsForFireDate setWeekday: 1] ; //for fixing Sunday
    [componentsForFireDate setHour: 20] ; //for fixing 8PM hour
    [componentsForFireDate setMinute:0] ;
    [componentsForFireDate setSecond:0] ;

    NSDate *fireDateOfNotification = [calendar dateFromComponents: componentsForFireDate];
    UILocalNotification *notification = [[UILocalNotification alloc]  init] ;
    notification.fireDate = fireDateOfNotification ;
    notification.timeZone = [NSTimeZone localTimeZone] ;
    notification.alertBody = [NSString stringWithFormat: @"New updates!"] ;
    notification.userInfo= [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"New updates added for that week!"] forKey:@"new"];
    notification.repeatInterval= NSDayCalendarUnit ;
    notification.soundName=UILocalNotificationDefaultSoundName;

    NSLog(@"notification: %@",notification);//it indicates that the notif will be triggered today at 8PM and not Sunday.

    [[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

谢谢。

Answer 1

您错过了NSWeekCalendarUnit初始化函数中的NSDateComponents。添加NSWeekCalendarUnit并将repeatInterval设置为NSWeekCalendarUnit，然后输出

next fire date = Sunday, November 24, 2013 at 8:00:00 PM

代码在这里：

  NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *now = [NSDate date];
NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit | NSWeekCalendarUnit |  NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: now];
[componentsForFireDate setWeekday: 1] ; //for fixing Sunday
[componentsForFireDate setHour: 20] ; //for fixing 8PM hour
[componentsForFireDate setMinute:0] ;
[componentsForFireDate setSecond:0] ;

  //...
  notification.repeatInterval = NSWeekCalendarUnit;
  //...

Answer 2

我也搜索过它。下面的代码对我有用。将星期日值1到7星期日到星期六，并通知您想要触发并指定日期然后通知的通知机构将在该特定日期到来。设定日期时会自动设定时间。

希望这对你有所帮助。

-(void) weekEndNotificationOnWeekday: (int)weekday :(UILocalNotification *)notification : (NSDate*) alramDate
{
    NSCalendar *calendar = [NSCalendar currentCalendar];

    NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit | NSWeekCalendarUnit |  NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: alramDate];
    [componentsForFireDate setWeekday: weekday] ; //for fixing Sunday
//    [componentsForFireDate setHour: 20] ; //for fixing 8PM hour
//    [componentsForFireDate setMinute:0] ;
//    [componentsForFireDate setSecond:0] ;
    notification.repeatInterval = NSWeekCalendarUnit;
    notification.fireDate=[calendar dateFromComponents:componentsForFireDate];
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

每周在特定日期和时间触发通知

2 个答案: