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Re: Rounding an NSDate down
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Re: Rounding an NSDate down


  • Subject: Re: Rounding an NSDate down
  • From: Todd Ransom <email@hidden>
  • Date: Fri, 7 Dec 2007 22:41:42 -0500

Thanks Jim and Nick for the responses. I knew it had to be easier than what I was trying...

Todd Ransom
Return Self Software
http://returnself.com



On Dec 7, 2007, at 10:12 PM, Jim Thomason wrote:

You shouldn't need to convert to an NSString. NSCalendarDates are
NSDates, so you should just be able to pass in an NSCalendarDate
wherever an NSDate is requested.

//broken up into multiple ops for clarity
NSCalendarDate* calendarDate = [myDate dateWithCalendarFormat:nil timeZone:nil];
NSCalendarDate* roundedDate = [calendarDate dateByAddingYears: 0
months: 0
days: 0
hours: 0
minutes: - [calendarDate minuteOfHour]
seconds: 0];


[someObject doNeatThingWithDate:roundedDate];

-Jim.....

On Dec 7, 2007 8:42 PM, Todd Ransom <email@hidden> wrote:
I cannot seem to figure out any way to round down a date without a lot
of messy conversion to NSCalendarDates and NSStrings and back to an
NSDate, which seems like it would be error prone.


If I have a date like this:

01/01/2007 12:30 PM

I want to round it down to the nearest hour, basically just dropping
the minutes so it ends up like this:

01/01/2007 12:00 PM

Does anyone know of an easy way to do this?

Todd Ransom
Return Self Software
http://returnself.com



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  • Follow-Ups:
    • Re: Rounding an NSDate down
      • From: Dominik Pich <email@hidden>
References: 
 >Rounding an NSDate down (From: Todd Ransom <email@hidden>)
 >Re: Rounding an NSDate down (From: "Jim Thomason" <email@hidden>)

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