0

我需要检查一个事件日期,它应该在当前日期和从现在起 60 天之间。使用了下面的代码,但它不能正常工作。请注意,我正在从我的服务器获取这样的事件字符串 - “2012-04-14T16:50:02Z”。

    // current date
double currDateInMilliSecs = [NSDate timeIntervalSinceReferenceDate] * 1000;    
NSLog(@"currDateInMilliSecs: %f", currDateInMilliSecs);

// sixty days
double sixtydaysvalue = 60.0 * 24.0 * 3600.0 * 1000.0;
NSLog(@"sixtydaysvalue: %f", sixtydaysvalue);
// add current date + sixt days
double sixtyDaysMilliSecsFromCurrDate = currDateInMilliSecs + sixtydaysvalue;
NSLog(@"sixtyDaysMilliSecsFromCurrDate: %f", sixtyDaysMilliSecsFromCurrDate);

// check does the event date between current date + 60 days
NSDateFormatter *df = [[NSDateFormatter alloc] init];
//[df setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];
[df setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss'Z'"];
//[df setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

// [eventDict objectForKey:@"begin_at"] gives date string like this "2012-04-14T16:50:02Z"  for ex.
NSDate *eventdate = [df dateFromString:[eventDict objectForKey:@"begin_at"]];

NSTimeInterval nowSinceEventDate = [eventdate timeIntervalSince1970];
NSLog(@"nowSinceEventDate: %f", nowSinceEventDate);
double eventDateInMilliSecs = nowSinceEventDate * 1000;
NSLog(@"eventDateInMilliSecs: %f", eventDateInMilliSecs);

// this is not working as expected    
if ( eventDateInMilliSecs<sixtyDaysMilliSecsFromCurrDate && eventDateInMilliSecs>currDateInMilliSecs )
{


}
else
{
}
4

2 回答 2

2

您正在尝试解决这个问题,就好像它是 Java 一样,但事实并非如此。相反,尝试使用 Cocoa Touch 框架中的东西。由于您的计算相当简单,您可以使用日期来完成它们,但使用 NSCalendar 和 NSDateComponents 可以很容易地完成更复杂的事情。

一个简单的解决您的问题的方法(这里我们假设eventdate是您使用格式化程序创建的日期):

NSDate* now = [NSDate date];
NSDate* sixtyDaysFromNow = [now dateByAddingTimeInterval:(60 * 60 * 24 * 60)];
if( [eventDate earlierDate:now] == now && [eventDate laterDate:sixtyDaysFromNow] == sixtyDaysFromNow ) {
  // the event date is within scope
} else {
  // the event date is outside stop
}
于 2012-04-19T13:21:15.190 回答
0

使用我的函数来比较它在我的项目上的工作日期

我希望它对你有帮助

-(BOOL)date:(NSDate*)date isBetweenDate:(NSDate*)beginDate andDate:(NSDate*)endingDate

{

    if ([date compare:beginDate] == NSOrderedAscending)
        return NO;

    if ([date compare:endingDate] == NSOrderedDescending) 
        return NO;

    return YES;
}
于 2012-04-19T13:15:28.113 回答