应用程序关闭7天后安排本地通知

Question

local notifications为我的应用程序启用它有点困难.

,是的,我建立了我的项目,一个local notification巫婆我想要的应用程序已被关闭后安排的一个星期 例如,如果用户在星期六8日打开应用程序,则本地通知应出现在15日的下一个星期六,但时间应该更改.例如,他/她在晚上8点关闭应用程序,我不想在下周8点打扰他们,所以我想在下午6点或类似的地方显示每个通知.

现在你知道我的问题,这是我正在使用的代码:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    [[UIApplication sharedApplication] cancelAllLocalNotifications];

    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar] ;
    NSDateComponents *componentsForReferenceDate = [[NSDateComponents alloc] init];

    //set day (saturday)

    [componentsForReferenceDate setDay:26] ;
    [componentsForReferenceDate setMonth:1] ;
    [componentsForReferenceDate setYear:2013] ;

    [componentsForReferenceDate setHour: 17] ;
    [componentsForReferenceDate setMinute:30] ;
    [componentsForReferenceDate setSecond:00] ;

    NSDate *fireDateOfNotification = [calendar dateFromComponents: componentsForReferenceDate];

    // Create the notification

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


    notification.fireDate = fireDateOfNotification ;
    notification.timeZone = [NSTimeZone localTimeZone] ;
    notification.alertBody = [NSString stringWithFormat: @"Du wirst vermisst! \nDeine App braucht dich, schreibe sie zu Ende!"] ;
    notification.alertAction = @"Zurückkehren";
    notification.userInfo= [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Some information"] forKey:@"information"];
    notification.repeatInterval= NSWeekCalendarUnit ;
    notification.soundName = @"Appnotifisound.wav";
    notification.applicationIconBadgeNumber = 1;
    [[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

}

我知道必须有更多的方法来删除徽章和didrecievenotification,但是我让它们出来因为对此没有重要意义.

使用此代码,我设法在每个星期六下午5:30(德国)安排通知.但我想只安排一次,当应用程序关闭一个星期.这有可能吗？如果有人能够纠正我的代码或给我一个解决方案,我会很高兴.

致以最诚挚的问候,感谢您阅读这篇长篇文章,

诺亚

Answer 1

您应该取消预先安排以前的通知.

for (UILocalNotification *lNotification in [[UIApplication sharedApplication] scheduledLocalNotifications]) 
    {
        if ([[lNotification.userInfo valueForKey:@"information"] isEqualToString:@"Some information"])
        {
            [[UIApplication sharedApplication]cancelLocalNotification:lNotification];
            break;
        }
    }

通过以下方式设置开火日期:

NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *componentsForReferenceDate = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit)
                                     fromDate:[NSDate date]];
    [componentsForReferenceDate setHour: 17] ;
    [componentsForReferenceDate setMinute:30] ;
    [componentsForReferenceDate setSecond:00] ;

    NSDate *tempDate = [calendar dateFromComponents: componentsForReferenceDate];
    [componentsForReferenceDate release];

    NSDateComponents *comps = [[NSDateComponents alloc]init];
    [comps setDay:7];
    NSDate *fireDateOfNotification = [calendar dateByAddingComponents:comps
                                                               toDate:tempDate options:0]
    [comps release];