Comparing Date and Time Object

Question

I was working with a method and it was not giving me proper output then I came to know, the way I was comparing date and time object was completely wrong. I googled but could not find some relevant solution. I want to compare a date and time object with another object.

for example:

  if (dtcur >= dtstart && dtcur <= myDT) // 2014-03-24 11:30:00 >= 2014-03-24 11:00:00 & 2014-03-24 11:30:00 <= 2014-03-25 11:00:00
  {
     // should come here in if condition
  }

but it goes in else. It means my comparison is wrong, can anyone help me about how to compare two date and time objects. Thanks in advance

Look [here](http://stackoverflow.com/questions/5965044/how-to-compare-two-nsdates-which-is-more-recent). This may help you — Akhilrajtr, Mar 24 '14 at 07:27
isn't it only for date comparison ? I want to compare date and time with another date an time for example if(dateTimeObj1 <=dateTimeObj2) { nslog (@"yes"); } where as dateAndTimeObj1 would be 2014-05-2014 12:31 — user3422986, Mar 24 '14 at 07:30

score 0 · Answer 1 · answered Mar 24 '14 at 07:31

BOOL isLaterOrEqualToStartDate = [dtcur isEqualToDate:dtstart] || [dtcur later:dtstart];
BOOL isEarlierOrEqualToMyDate = [dtcur isEqualToDate:myDT] || [dtcur earlier:myDT];

if(isLaterOrEqualToStartDate && isEarlierOrEqualToMyDate)
{
    // do something
}

nsuinteger · Answer 2 · 2014-03-24T08:16:08.990

0

are you refering to NSDate ?? if so you can compare using the property timeIntervalSince1970 (which is a double value). you cannot directly compare NSDate as they are objects. Here is small example. you can uncomment the line to see how result changes .

NSDate *date1 = [NSDate date];
NSDate *date2 = [date1 dateByAddingTimeInterval:10];

if (date2.timeIntervalSince1970 > date1.timeIntervalSince1970)
{
 NSLog(@"date 2 is bigger");
}
else
{
NSLog(@"date 1 is bigger");
}

edited Mar 24 '14 at 08:16

answered Mar 24 '14 at 07:34

nsuinteger

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Are you sure that it's not possible to compare two NSDate objects? Why don't you read Apple's documentation before writing such wrong things? – Igor Matyushkin Mar 24 '14 at 07:42
why dont you try to understand the context of what I said before typing such nonsense ? if you compare nsobjects with ( > , < , >= , <= ) you will get undesired results. run it for yourself (several times) and see if you're so sure it works... NSDate has a compare: method which you can use otherwise easiest would be to use the method timeIntervalSince1970 which will give you a double value which you can compare the way he intended. – nsuinteger Mar 24 '14 at 07:59
hey @nsuinteger, you've mistaken with receiver of this message. I never compared NSDate objects with primitive operators. And your solution of using `compare:` method is not the best in kind of performance. Use `later:` and `earlier:` methods instead. – Igor Matyushkin Mar 24 '14 at 09:13
Your code doesn't solve the issue. – Igor Matyushkin Mar 24 '14 at 09:15

score 0 · Accepted Answer · answered Mar 24 '14 at 07:46

0

Many objects, including NSDate, have a compare: method. Use it like so:

if ([date1 compare:date2] == NSOrderedAscending) {
  // date2 is after date1
} else if ([date1 compare:date2] == NSOrderedDescending) {
  // date2 is before date1
} else if ([date1 compare:date2] == NSOrderedSame) {
  // they're both the same date
}

answered Mar 24 '14 at 07:46

Abhi Beckert

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Your code doesn't solve the issue. Read the question carefully before typing anything in the answers. – Igor Matyushkin Mar 24 '14 at 09:16
@IgorMatyushkin Hmm? He wants to know how to compare dates. That's what my code does. – Abhi Beckert Mar 24 '14 at 09:34
it had worked P.s. thanks a lot :) – user3422986 Mar 25 '14 at 14:44

Comparing Date and Time Object

3 Answers3