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Ashley Kelley
Courses Plus Student 10,554 PointsUsing NSDate create a date object that is 10 days from today and call it 'futureDate'.
Hi guys,
I seem to be struggling with setting the date to 10 days ahead. Code below:
NSTimeInterval secondsPerDay = 60 * 60 * 24; NSDate *futureDate = [NSDate dateWithTimeIntervalSinceNow:secondsPerDay];
I've tried altering the values for 9 and 10 days ahead but I keep getting the incorrect error. I know I'm missing something really simple here so any help would be great.
Thanks,
Ashley
5 Answers
Sebastien Thomas
16,502 PointsHey Ashley,
You need to alloc/init NSDate *futureDate first. Then, you need to multiply secondsPerDay by 10 to get a value for 10 days.
The following code works :
NSTimeInterval secondsForTenDays = 60 * 60 * 24 * 10; NSDate *futureDate = [[NSDate alloc] init]; futureDate = [NSDate dateWithTimeIntervalSinceNow:secondsForTenDays];
Sebastien
Ashley Kelley
Courses Plus Student 10,554 PointsThanks Sebastien!
I tried the alloc init as well but I still seemed to get this wrong. Thanks for your help!
Sebastien Thomas
16,502 PointsIf you copy/paste the code I wrote, it will work fine :)
NSTimeInterval secondsForTenDays = 60 * 60 * 24 * 10; NSDate *futureDate = [[NSDate alloc] init]; futureDate = [NSDate dateWithTimeIntervalSinceNow:secondsForTenDays];
Ashley Kelley
Courses Plus Student 10,554 PointsHi Sebastien, sorry to bother you again.
Can you please help me solve the below? I seem to forget how to convert an object to a string.
Convert the 'futureDate' object to a string object named 'dateString'.
Thanks for your help again.
Ashley
Ashley Kelley
Courses Plus Student 10,554 PointsYeah it worked perfectly, thanks!
I don't know if this coding challenge has a bug or if I'm having an off day but I don't seem to be passing this specific challenge at all. On the next task it says:
Create a date format using the given 'dateFormatter' variable to display any date with the format of '02/29/2012'. Don't worry about using it for now, just set up the formatter.
So I've entered the following code which is not working:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"MM/DD/YYYY"];
I've had a look at the supporting document but I can't seem to figure out what I'm doing wrong.
Ashley Kelley
Courses Plus Student 10,554 PointsSolved it, just removed the NSDateFormatter and * from the beginning. I don't know why I'm not getting this today! :)
Art Hayes
7,251 PointsArt Hayes
7,251 PointsWhy can't you just format with the convenience constructor as stated in the video - dateWithTimeIntervalSinceNow: ?? It saves you a whole line.
The code below should validate in the Challenge, but throws an error.
NSTimeInterval *oneDaySeconds = (60 * 60 * 24); NSDate *futureDate = [NSDate dateWithTimeIntervalSinceNow:(oneDaySeconds * 10)];
I love the videos, but the error-checking in the challenges has been wrong a few times and it's frustrating!
Rohan A.
4,008 PointsRohan A.
4,008 PointsThis worked for me, just one line of code -
NSDate *futureDate = [NSDate dateWithTimeIntervalSinceNow:+(secondsPerDay * 10)];