Question

我正在制作一个闹钟应用程序，用于在某个用户选择的日期触发本地通知，即如果用户选择了M，F，Sat，那么它应该仅在每个M / F / Sat发出警报。我遇到的问题是那时我的血腥警报每天都在开火。如何将其限制为用户选择的日期？这是我的代码

//For testing purposes I want the alarm to fire only on Monday at 7:00am.
//This fires every day at 7:00am
[[UIApplication sharedApplication] cancelAllLocalNotifications];

 NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

NSDate *now = [NSDate date];    

    // set components for time 7:00 a.m. Monday
    NSDateComponents *componentsForFireDate = [calendar components:(NSYearCalendarUnit |   NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit | NSWeekdayCalendarUnit) fromDate: now];

    [componentsForFireDate setWeekday: 2] ;
    [componentsForFireDate setHour: 7] ;
    [componentsForFireDate setMinute:0] ;
    [componentsForFireDate setSecond:0] ;

    NSDate *fireDateOfNotification = [calendar dateFromComponents: componentsForFireDate];

    // Create the notification
    UILocalNotification *notification = [[UILocalNotification alloc]  init] ;

    notification.fireDate = fireDateOfNotification ;
    notification.timeZone = [NSTimeZone localTimeZone] ;
    notification.alertBody = [NSString stringWithFormat: @"Wake up!"] ;
    notification.userInfo= [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Waking Up time"] forKey:@"wakeUp"];

//Problem is here NSDayCalendarUnit makes my alarm fire every day
    notification.repeatInterval= NSDayCalendarUnit ;

    //notification.soundName=UILocalNotificationDefaultSoundName;
    notification.soundName=@"alarm-clock-ringing-01.wav";

    [[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

Answer 1

如果您实际上只启动本地通知一次但是当您的设备收到通知时，它是否会有效，请让它再次发布相同的通知。您的应用无需运行即可运行。

您的应用程序未运行时，您在应用代理的applicationDidFinishLaunching中处理本地通知：

UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];

// handles notification when application is relaunched after being terminated
// not when app is already in the foreground running.
if(localNotif)
{   
    // repeat the same local notification again
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
}

注意：repeatInterval将按您指定的单位执行相同的操作（在本例中为“day”，无论您指定的通知日期如何，都会每天重复）

Answer 2

你可以发出三个警报：一个是最接近的星期一，最接近的星期三和最接近的星期五，并且每个都设置notification.repeatInterval = NSWeekCalendarUnit。

如何在某些日子重复UILocalNotification

2 个答案: