本地通知调度问题

Question

我已经设置了本地通知，但我的问题是我已将其设置为星期六，并且重复间隔为一周。但是，我设置了正确的日期，但我仍然在每个星期天得到它，但在正确设置的时间。有人看到我的错误吗？哦，别忘了，如果我设置了正确的日期，如果它...星期三，我会在一分钟后立即收到通知。不知道我的错在哪里。

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

    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar] ;

    NSDateComponents *componentsForReferenceDate =

    [calendar components:(NSDayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit ) fromDate:[NSDate date]];

    //set day (saturday)

    [componentsForReferenceDate setDay:1] ;
    [componentsForReferenceDate setMonth:12] ;
    [componentsForReferenceDate setYear:2012] ;

    NSDate *referenceDate = [calendar dateFromComponents:componentsForReferenceDate] ;

    // set components for time 18:30. 

    NSDateComponents *componentsForFireDate =

    [calendar components:(NSYearCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit| NSSecondCalendarUnit ) fromDate: referenceDate];

    [componentsForFireDate setHour: 18] ;
    [componentsForFireDate setMinute:38] ;
    [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: @"You are missed!"] ;
    notification.alertAction = @"Back";
    notification.userInfo= [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Some information"] forKey:@"information"];
    notification.repeatInterval= NSWeekCalendarUnit ;
    notification.soundName = @"Appnotifisound.wav";
    notification.applicationIconBadgeNumber = 1;
    [[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

谢谢。

Answer 1

这是因为您正在创建两个不同的NSDateComponents。一个用于设置日期、月份和年份，另一个用于设置小时、分钟和秒。

这应该可行：

- (void)applicationDidEnterBackground:(UIApplication *)application {

   [[UIApplication sharedApplication] cancelAllLocalNotifications];

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

    //set day (saturday)

    [componentsForReferenceDate setDay:7] ;
    [componentsForReferenceDate setMonth:12] ;
    [componentsForReferenceDate setYear:2012] ;

    // set time (08:30 PM) 

    [componentsForReferenceDate setHour: 20] ;
    [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: @"You are missed!"] ;
    notification.alertAction = @"Back";
    notification.userInfo= [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Some information"] forKey:@"information"];
    notification.repeatInterval= NSWeekCalendarUnit ;
    notification.soundName = @"Appnotifisound.wav";
    notification.applicationIconBadgeNumber = 1;
    [[UIApplication sharedApplication] scheduleLocalNotification:notification] ;

}