Comparison to disable button

[ArtandIllustration]

Hi All,

Trying to compare a date (shown in a label, ''fed'' by an NSDate) and a string I've specified in order to disable a button. The label shows the date correctly and there are no fatal errors but the button is unaffected. Any thoughts? I know this may seem basic so I apologise; I've only been learning a couple of weeks in spare time from various tutorials - seems like a giant.

NSDate *B = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; //NSDate from date
[dateFormatter setDateFormat:@"EEE"];
//Use label to check recept of Date
labelDate.text = [dateFormatter stringFromDate:[NSDate date]];


NSString *daytocompare = @"SAT";
labelShows.text =daytocompare;

if([daytocompare isEqualToString:labelDate.text]) {
buttontosatnoon.enabled=YES;
}
else{
buttontosatnoon.enabled= NO;



Any thoughts? Thank you!

[smasher]

Good job on giving an example of your problem that's easy to test and debug; that's key for getting a good answer from a forum. . I took out the labels and added some NSLogs so I could see what's happening:

-(void)test8{
	
	NSDate *B = [NSDate date]; //unused variable B
	NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; //NSDate from date
	[dateFormatter setDateFormat:@"EEE"];
	//Use label to check recept of Date
	NSString *labelDateText = [dateFormatter stringFromDate:[NSDate date]];
	
	
	NSString *daytocompare = @"SUN";
	
	NSLog(@"labelDateText %@",labelDateText);
	NSLog(@"daytocompare %@",daytocompare);
	
	BOOL datesMatch = [daytocompare isEqualToString:labelDateText];
	
	NSLog(@"datesMatch %d", datesMatch);
	
}

Here's my output:

2010-12-05 09:21:39.024 testProj2[2660:307] labelDateText Sun
2010-12-05 09:21:39.028 testProj2[2660:307] daytocompare SUN
2010-12-05 09:21:39.032 testProj2[2660:307] datesMatch 0

You can probably see the problem there - "Sun" will not match "SUN" because isEqualToString: is case sensitive. You need a case-insensitve compare.

BOOL datesMatch = ([datytocompare caseInsensitiveCompare:labelDateText] == NSOrderedSame);

That compares the two strings for sorting and tells you if they have the same ordering; that'll server your purpose too.

You could also change your string constants so they match the output of the formatter, or uppercase all of the strings before comparing.

[ArtandIllustration]

Hello Smasher,

Sorry for later reply; have had a few net problems - Thank you very much! Seems the problem was a combination of the case sensitivity issue after all (didn't have any idea is was case aware) and I had an error in my IB linking. Thank you for your help