iPhone SDK: Testing for valid string date

Question

I want to be able to validate a date.

It's valid entry is 4 characters with a mmyy mask.

I want to make sure that the value entered is indeed a date.

Thanks in advance.

score 4 · Accepted Answer · answered Oct 05 '10 at 13:46

4

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"mmyy"];
NSDate *date = [dateFormatter dateFromString:YOUR_STRING];


If (date) { 
// CORRECT
}

answered Oct 05 '10 at 13:46

vodkhang

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you can try with `[str intValue];` – vodkhang Oct 05 '10 at 23:33
your date format should be MMyy. mm is for minute, so 45 is valid and you should also release your dateFormatter – FrancoisC Feb 06 '13 at 16:59

score 0 · Answer 2 · answered Nov 01 '13 at 17:19

This dateFormatter-thing is inconvinient to me since it accepts to many things as valid date. ok, the day after yesus was born is indeed a valid date ;-) and also dateformatter is removing 1 hour from my datestring because it seems to calculate with utc time or so...thats why i like to check for correct dates with regular expressions:

[textfield.text rangeOfString:@"^(0[1-9]|[1-2][0-9]|3[0-1])(0[1-9]|1[0-2])(19|20)[0-9]{2}" options:NSRegularExpressionSearch].location == NSNotFound

this example is for german date format

score 0 · Answer 3 · answered Oct 05 '10 at 13:44

0

User NSDateFormatter's -setDateFormat: and -dateFromString: methods. If the string is not in the correct format, you will get nil returned from -dateFromString:.

answered Oct 05 '10 at 13:44

iPhone SDK: Testing for valid string date

3 Answers3

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