what's wrong with this code? date calculate

[bodalal]

this is for Mac app not iphone

it should calculate years, months and days between tow date

but it does not work, nothing show up in the Labels (ddrsltY , ddrsltM and ddrsltD )

can any one help me plz, what is the wrong and how can i fix it ?

#import "DDateCompnt.h"

@implementation DDateCompnt
- (IBAction)ddCalc:(id)sender {
		
			
	NSDate *dateNow = [[NSDate alloc] init]; // The current date
	NSDate *endDate = ddbirth;
	
	NSCalendar *gregorian = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];
	
	NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
	
	NSDateComponents *components = [gregorian components:unitFlags fromDate:endDate toDate:dateNow options:0];
	
    int years = [components year];
	int months = [components month];
	int days = [components day];
		
	[ddrsltY setIntValue:years]; 	
	[ddrsltM setIntValue:months];
	[ddrsltD setIntValue:days];


	
}



@end

[Mr Jack]

Have you tried putting a breakpoint in, and stepping through to see what values you are getting?

[bodalal]

Thanx for your reply

no i didn't, i do not know how to !

it looks like every thing is OK, i don't know why there is nothing show up in the labels


thanx any way

[Mr Jack]

Originally Posted by bodalal

no i didn't, i do not know how to !

It's really easy. I assume you're using XCode? Right click in the gutter to the left of your code, and choose add breakpoint. Do this on the first line of the function you want to debug.

Then, making sure the enable breakpoints option is set, and that you've chosen the debug build of your code (in the drop-down near the top left), click the Build and Debug button.

Then bring up the debugger. I can't remember off hand which one of the menu headings its under, just look through until you find it.

Then do whatever should cause your code to be run, and make sure that it's stopped at your breakpoint*. You can now step through your code line-by-line using the buttons in the debugger, and see what each of the variables are set to in the watch window, or by hovering your mouse over the variable of interest.

This should help you identify the problem.


* - if it doesn't get triggered, your problem is most likely you're not calling your code.

[barrettj]

Originally Posted by bodalal

this is for Mac app not iphone

it should calculate years, months and days between tow date

but it does not work, nothing show up in the Labels (ddrsltY , ddrsltM and ddrsltD )

can any one help me plz, what is the wrong and how can i fix it ?

#import "DDateCompnt.h"

@implementation DDateCompnt
- (IBAction)ddCalc:(id)sender {
		
			
	NSDate *dateNow = [[NSDate alloc] init]; // The current date
	NSDate *endDate = ddbirth;
	
	NSCalendar *gregorian = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];
	
	NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
	
	NSDateComponents *components = [gregorian components:unitFlags fromDate:endDate toDate:dateNow options:0];
	
    int years = [components year];
	int months = [components month];
	int days = [components day];
		
	[ddrsltY setIntValue:years]; 	
	[ddrsltM setIntValue:months];
	[ddrsltD setIntValue:days];


	
}



@end

Are you sure you hooked up the action in interface builder and saved the file (I ALWAYS forget to save)?

You can double check if your selector is running by adding a NSLog(@"my method was called!"); and checking the console to make sure that appears.

[bodalal]

Originally Posted by barrettj

Are you sure you hooked up the action in interface builder and saved the file (I ALWAYS forget to save)?

You can double check if your selector is running by adding a NSLog(@"my method was called!"); and checking the console to make sure that appears.

thanx allot .. you'r right, the problem was in connections in IB.

it works now