NSDate comparison in custom format Issue

Question

I want compare two dates. I am getting device date in yyyy-dd-mm format and getting mm-dd-yyyy from webservices. I want to change device date format and get that changed date in NSDate object. Here is my code:

 NSDate *today = [[NSDate alloc] init];     
 NSLog(@"today : %@", today);
 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
 [dateFormatter setDateFormat:@"MM dd yy"];
 NSString *tString = [dateFormatter stringFromDate:today];
 NSLog(@"tString : %@",tString);
 NSDate *date = [dateFormatter dateFromString:tString];
 NSLog(@"date : %@",date);

what this [dateFormatter set] does? – Krishnabhadra May 23 '11 at 12:23 — Krishnabhadra, May 23 '11 at 12:23

score 0 · Accepted Answer · edited May 23 '17 at 11:55

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You are saying date coming from webservice is in mm-dd-yyyy format..Then convert it into NSDate like this

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
 [dateFormatter setDateFormat:@"MM-dd-yyyy"];
NSDate *convertedDate = [dateFormatter dateFromString:yourDateStringFromWeb];

You have device date already with you..Now you can compare two NSDate objects in many ways..See this and this..

edited May 23 '17 at 11:55

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answered May 23 '11 at 12:29

Krishnabhadra

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@Krishnabhadra: I tried above one. But when I convert that into NSdata object and again print on console, the format changed from MM-dd-yyyy – Swapnil May 23 '11 at 12:40
Output is: today : 2011-05-23 12:38:49 +0000 – Swapnil May 23 '11 at 12:41
iSwap, the main thing is you can compare between two NSDate object, you dont have to make them strings.. – Krishnabhadra May 23 '11 at 12:42
" I want to change device date format and get that changed date in NSDate object" , NSDate doesnt have any format. Format is only when you convert it to string to display.. – Krishnabhadra May 23 '11 at 12:43
@iSwap, confirm this, You are getting a date from webservice (like 5-27-2011) in strings, you want to convert it to NSDate object. Then compare it with a date which you already have in device (which is a string in format yyyy-dd-mm like 2011-27-5). Is this your requirement? – Krishnabhadra May 23 '11 at 12:48

NSDate comparison in custom format Issue

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