NSBrainDump

More Dates with iOS

2nd December, 2011 10:11 AM

I've been doing more iOS coding using Dates in various formats and hence I decided to add this post about it.

Generally, you'll grab a date using the following:-

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
NSLog(@"%@", [dateFormatter stringFromDate:[NSDate date]]);
 
[dateFormatter release];
 
// Output: Dec 2, 2011 10:11 AM

But say you just want the time ...

[dateFormatter setDateFormat:@"hh:mm:ss"]

// Output: 10:11:23

Now, let's say your want to specify something different. Well I couldn't find anything on the official Apple site about it, but I did find them listed on a blog, so I thought I'd reproduce them here:-

a:	AM/PM
A:	0~86399999 (Millisecond of Day)
 
c/cc:	1~7 (Day of Week)
ccc:	Sun/Mon/Tue/Wed/Thu/Fri/Sat
cccc:	Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
 
d:	1~31 (0 padded Day of Month)
D:	1~366 (0 padded Day of Year)
 
e:	1~7 (0 padded Day of Week)
E~EEE:	Sun/Mon/Tue/Wed/Thu/Fri/Sat
EEEE:	Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
 
F:	1~5 (0 padded Week of Month, first day of week = Monday)
 
g:	Julian Day Number (number of days since 4713 BC January 1)
G~GGG:	BC/AD (Era Designator Abbreviated)
GGGG:	Before Christ/Anno Domini
 
h:	1~12 (0 padded Hour (12hr))
H:	0~23 (0 padded Hour (24hr))
 
k:	1~24 (0 padded Hour (24hr)
K:	0~11 (0 padded Hour (12hr))
 
L/LL:	1~12 (0 padded Month)
LLL:	Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
LLLL:	January/February/March/April/May/June/July/August/September/October/November/December
 
m:	0~59 (0 padded Minute)
M/MM:	1~12 (0 padded Month)
MMM:	Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
MMMM:	January/February/March/April/May/June/July/August/September/October/November/December
 
q/qq:	1~4 (0 padded Quarter)
qqq:	Q1/Q2/Q3/Q4
qqqq:	1st quarter/2nd quarter/3rd quarter/4th quarter
Q/QQ:	1~4 (0 padded Quarter)
QQQ:	Q1/Q2/Q3/Q4
QQQQ:	1st quarter/2nd quarter/3rd quarter/4th quarter
 
s:	0~59 (0 padded Second)
S:	(rounded Sub-Second)
 
u:	(0 padded Year)
 
v~vvv:	(General GMT Timezone Abbreviation)
vvvv:	(General GMT Timezone Name)
 
w:	1~53 (0 padded Week of Year, 1st day of week = Sunday, NB: 1st week of year starts from the last Sunday of last year)
W:	1~5 (0 padded Week of Month, 1st day of week = Sunday)
 
y/yyyy:	(Full Year)
yy/yyy:	(2 Digits Year)
Y/YYYY:	(Full Year, starting from the Sunday of the 1st week of year)
YY/YYY:	(2 Digits Year, starting from the Sunday of the 1st week of year)
 
z~zzz:	(Specific GMT Timezone Abbreviation)
zzzz:	(Specific GMT Timezone Name)
Z:	+0000 (RFC 822 Timezone)

Posted in Development : iOS | Comments »

WWDC 2011 Session Videos

24th June, 2011 06:20 AM

The WWDC 2011 Session videos are now available via iTunes.

These HD videos can be downloaded, as long as you have a paid developer account -- which makes sense, as it's the developers who have accounts who will benefit from the content.

Click here to get them.

Posted in Video | Comments »