NSDateFormatter and yyyy-MM-dd

cocoa-touch, iphone, nsdate, nsdateformatter, objective-c

Solution

You are facing this problem because your date formatter is not correct.Suppose your newInvoice.date variable store "11:02:23" the your dateFormatter should be @"yy:MM:dd" and if your newInvoice.date variable store"2/22/11" then your dateFormatter should be @"MM/dd/yy"

NSDate *dateTemp = [[NSDate alloc] init];
NSDateFormatter *dateFormat1 = [[NSDateFormatter alloc] init];
NSDateFormatter *dateFormat2 = [[NSDateFormatter alloc] init];

[dateFormat1 setDateFormat:@"MM/dd/yy"];
[dateFormat2 setDateFormat:@"yyyy-MM-dd"];

dateTemp = [dateFormat1 dateFromString:newInvoice.date];
newInvoice.date = [dateFormat2 stringFromDate:dateTemp];

both format should be according to your requirement to get the correct result

Problem

I'm trying to take a NSString date in the format "2/22/11" and convert it to this format: 2011-02-22 This is my code: ``` NSDate *dateTemp = [[NSDate alloc] init]; NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateFormat:@"yyyy-MM-dd"]; dateTemp = [dateFormat dateFromString:newInvoice.date]; newInvoice.date = [dateFormat stringFromDate:dateTemp]; ``` `newInvoice.date` starts as an NSString equal to "2/22/11". `dateTemp` ends up NIL. `newInvoice.date` ends up NIL as well. I can't for the life of me figure out why.

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