我想从日期选择器中打印时间,并且包括上午/下午。我可以打印出时间,但从来没有打印过上午/下午。我该怎么做?
我想从日期选择器中打印时间,并且包括上午/下午。我可以打印出时间,但从来没有打印过上午/下午。我该怎么做?
使用以下代码:
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"hh:mm a"];
NSString *str_date = [dateFormatter stringFromDate:[NSDate date]];
NSLog(@"str_date:%@",str_date);
你可以使用这个文档获得更多信息:NSDateFormatter 类参考。 以下是一个例子:
NSDate* date = [NSDate date];
NSDateFormatter* dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"MM/dd/yyyy"];
[formatter setTimeStyle:NSDateFormatterFullStyle];
NSLog(@"date=%@",[dateFormatter stringFromDate:date]);
let formatter = DateFormatter()
formatter.dateFormat = "h:mm a 'on' MMMM dd, yyyy"
formatter.amSymbol = "AM"
formatter.pmSymbol = "PM"
let dateString = formatter.string(from: Date())
print(dateString) // "4:44 PM on June 23, 2016\n"
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.timeZone = [NSTimeZone systemTimeZone];
df.AMSymbol = @"AM";
df.PMSymbol = @"PM";
df.dateFormat = "h:mm a 'on' MMMM dd, yyyy"
NSString *stringDate = [df stringFromDate:dateFromString];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@“dd-MMM”];
cell.dateLabel.text = [formatter stringFromDate:item.pubDate]
Pattern Result (in a particular locale)
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, ‘96
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
Hope this is useful to someone out there.
http://benscheirman.com/2010/06/dealing-with-dates-time-zones-in-objective-c/
这确实帮了我很多。它非常简单。
要打印 AM/ PM,请使用参数 a/aa/aaa
,所有这些参数都可以正常工作。
NSDateFormatter *myDateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[myDateFormatter setDateFormat:@"hh:mm aaa"]; //a,aa or aa all will work.
[myDateFormatter setDateFormat:@"hh:mm aa"];
NSString *myDate = [myDateFormatter stringFromDate:[NSDate date]];
NSLog(@"myDate is :%@",myDate);
你可以在 Swift 5 中使用
var strDate1:String = "2019-12-19 05:42:04";
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
let dateObj = dateFormatter.date(from: strDate1)
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss a"
let strigDate = dateFormatter.string(from: dateObj!)
2019-12-19 05:42:04 AM