CODEWITHSUNDEEP
iphoneobjective-ccocoa-touchios4
Devang
Devang

Reputation: 11338

How to compare two dates in iphone?

I want to compare the todays date and other date coming from my database. For example, 2011-03-25 compare it with 2011-02-25

How can i formate my database date as the NSDateFormatter require NSDdate datatype ?

Upvotes: 0

Views: 6093

Answers (6)

raf
raf

Reputation: 2567

In Swift:

let date1 = NSDate() //some date
let date2 = NSDate() //another date

let firstDate = date1.earlierDate(date2)
let lastDate = date1.laterDate(date2)

Upvotes: 0

Jhaliya - Praveen Sharma
Jhaliya - Praveen Sharma

Reputation: 31722

Cocoa has couple of methods for this:

in NSDate

– isEqualToDate:
– earlierDate:
– laterDate:
– compare:

When you use - (NSComparisonResult)compare:(NSDate *)anotherDate ,you get back one of these:

The receiver and anotherDate are exactly equal to each other, NSOrderedSame
The receiver is later in time than anotherDate, NSOrderedDescending
The receiver is earlier in time than anotherDate, NSOrderedAscending.

for more read the SO post

Just go through the blog post, there are many date related utility functions.

http://arstechnica.com/apple/guides/2010/03/how-to-real-world-dates-with-the-iphone-sdk.ars/2

Upvotes: 3

Angelo
Angelo

Reputation: 533

NSDate *date1 = [NSDate date];
NSDate *date2 = [NSDate date];

if ([date1 compare: date2]==NSOrderedAscending) {
    NSLog(@"YES");
}

Upvotes: 1

jnpdx
jnpdx

Reputation: 52387

You can use NSDate compare: or timeIntervalSinceReferenceDate -- that'll get you started

Upvotes: 0

Benoît
Benoît

Reputation: 7427

If your date are string like year-month-day, you can just compare string:

 if ([date1 compare:string2]==NSOrderedAscending) {
 } else if ([date1 compare:string2]== NSOrderedDescending) {
 } else {
 }

It will works because fields in date are from most important to less, like a string comparison.

Upvotes: 0

Friedrich
Friedrich

Reputation: 5996

http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DatesAndTimes/Articles/dtDates.html#//apple_ref/doc/uid/20000183-BCIDBADB

Isn't that the same on Iphone?

Upvotes: 0

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