两个日期之间的NSDate

Question

这是检查serverOnNowDate是否在publishedStartTime和publishedEndTime之间的好方法吗？

 return !( [self.publishedStartTime compare:serverOnNowDate] == NSOrderedDescending
        || [self.publishedEndTime compare:serverOnNowDate] == NSOrderedAscending );

Answer 1

写成实例方法:

- (BOOL)isBetweenDate:(NSDate *)earlierDate andDate:(NSDate *)laterDate
{
    // first check that we are later than the earlierDate.
    if ([self compare:earlierDate] == NSOrderedDescending) {

        // next check that we are earlier than the laterData
        if ( [self compare:laterDate] == NSOrderedAscending ) {
            return YES;
        }
    }

    // otherwise we are not
    return NO;
}

用法:

NSDate *date = [NSDate now];

if ( [date isBetween:startDate andDate:finishDate] ) {
    NSLog(@"Between dates!!!");
}