?部分日期格式的總結：

NSDateFormatter * dateFormatter = [[[NSDateFormatter alloc] init]autorelease];

[dateFormatter setAMSymbol:@"AM"];

[dateFormatter setPMSymbol:@"PM"];

[dateFormatter setDateFormat:@"dd/MM/yyyy hh:mmaaa"];

NSDate *date = [NSDate date];

NSString * s = [dateFormatter stringFromDate:date];

顯示效果為：10/05/2010 03:49PM

?

下面附上幾個格式：這個是從Cocoachina找來的：

yyyy:MM:dd G 'at' HH:mm:ss zzz??????????? 1996.07.10 AD at 15:08:56 PDT

EEE, MMM d, "yy???????????????????????????????????????? Wed,july 10, '99

h:mm a???????????????????????????????????????????????????? 12:08 PM

hh 'o"clock' a,zzzz????????????????????????????????????? 12 o'clock PM, Pacific Daylight Time

K:mm a, z???????????????????????????????????????????????? 0:00 PM, PST

yyyyy,MMMM.dd GGG hh:mm aaa??????????? ????01996.july.10 AD 12:08 PM

?

下面是得到當前的年，月，日，時，分，秒：

NSCalendar *cal = [NSCalendar currentCalendar];

unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

NSDateComponents *dd = [cal components:unitFlags fromDate:date];

int y = [dd year];

int m = [dd month];

int d = [dd day];

int h = [dd hour];

int m = [dd minute];

int s = [dd second];

轉載于:https://www.cnblogs.com/wengzilin/archive/2012/03/16/2400666.html

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