Question

我想做一个简单的闹钟。

在此代码部分中，从pickerdate（唯一的时间选择器）中获取日期。

如果闹钟是我添加一天之前的当前日期。

 // ALARM UNO
// Set Allarme Uno


   -(void)viewDidAppear:(BOOL)animated{

  NSDate *pickerDate = [NSDate date];

      NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];


      // Break the date up into components
  NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit |  NSMonthCalendarUnit |  NSDayCalendarUnit )
                                        fromDate:pickerDate];
   NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit |          NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                           fromDate:pickerDate];
// Set up the fire time
      NSDateComponents *dateComps = [[NSDateComponents alloc] init];
      [dateComps setDay:[dateComponents day]];
       [dateComps setMonth:[dateComponents month]];
           [dateComps setYear:[dateComponents year]];
           [dateComps setHour:[timeComponents hour]];
           //Notification will fire in one minute
           [dateComps setMinute:[timeComponents minute]];
           [dateComps setSecond:0];
          NSDate *itemDate = [calendar dateFromComponents:dateComps];
           [dateComps release];


[alarmDatePickerUno setDate:itemDate animated:YES];

}

          -(IBAction)setAlarmUno:(id)sender{

NSLog(@"picker in allarme");
NSDateFormatter *formatter =
[[[NSDateFormatter alloc] init] autorelease];
[formatter setTimeStyle:NSDateFormatterMediumStyle];

NSCalendar *currentCalendar = [NSCalendar currentCalendar]; 


AlarmDateUno = [alarmDatePickerUno date];
NSLog(@"allarme settata alle");
NSLog(@"%@", AlarmDateUno);


if ([alarmDatePickerUno.date compare:[NSDate date]] == NSOrderedAscending)
{
    NSLog(@"Date is not valid");

    NSDateComponents *oneDay = [[NSDateComponents alloc] init];
    [oneDay setDay:1];
    NSLog(@"Aggiungo un giorno");

    AlarmDateUno = [currentCalendar dateByAddingComponents:oneDay toDate:AlarmDateUno       options:0];
    NSLog(@"%@", AlarmDateUno);


    //return;
}

之后我将当前日期与闹钟进行比较......

// CONTROLLO TEMPO UNO

- (void)runTimerUno {

myTickerUno = [NSTimer scheduledTimerWithTimeInterval: 0.5
                                               target: self
                                             selector: @selector(showActivityUno)
                                             userInfo: nil
                                              repeats: YES];

}

- (void)showActivityUno {

 //  NSDate *date = [NSDate date];

if(isAlarmUnoOn == 1 && AlarmUnoPlaying ==0){

    NSLog(@"Confronto data e tempo");
   if ([[[NSDate date] earlierDate:AlarmDateUno] isEqualToDate: AlarmDateUno])   
    {
        AlarmUnoPlaying = 1;

        [self playAlarmSoundUno];
    }               

}

}

这是选择器视图中的日期中的问题是在当前时间之前，我添加了一个小时我在该行收到EXC_BAD_ACCESS错误：

 if ([[[NSDate date] earlierDate:AlarmDateUno] isEqualToDate: AlarmDateUno])

僵尸说我 [__NSDate timeIntervalSinceReferenceDate]：发送到解除分配的实例0x914b710的消息

我尝试每一件事，我不明白为什么......任何人都可以帮助我吗？

Answer 1

看来AlarmDateUno是一个属性。那是对的吗？如果是这样，您需要在设置时保留它 - 否则，在您尝试再次访问它之前可能会将其取消分配。

报警和日期比较

1 个答案: