如何以am / pm格式获取时间iphone NSDateFormatter？ [英] How to get the time in am/pm format iphone NSDateFormatter?
问题描述
使用NSDateFormatter在iPhone应用中工作。我从网络服务获得时间，如00:00:00，16：00：00，15:30:00等等。如果时间00:00:00到12 AM，如果时间16:00:00时，日期返回null 。
Am working in an iPhone app with using the NSDateFormatter. Am getting the time from the webservice like "00:00:00", "16:00:00","15:30:00" and so on. I need to convert these time to
if the time is "00:00:00" to "12 AM", if the time is "16:00:00" to "4 PM", if the time is "15:30:00" to "3.30 PM". I have used the below code to this but when i have pass "16:00:00" the date returns null.
NSString *dats1 = @"16:00:00";
NSDateFormatter *dateFormatter3 = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter3 setDateStyle:NSDateFormatterMediumStyle];
[dateFormatter3 setDateFormat:@"hh:mm:ss"];
NSDate *date1 = [dateFormatter3 dateFromString:dats1];
NSLog(@"date1 : %@", date1); **// Here returning (null)**
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"hh:mm a"];
NSLog(@"Current Date: %@", [formatter stringFromDate:date1]); **// Here also returning (null)**
[formatter release];
当通过00:00:00时，它正确地返回12 AM。有谁可以帮我解决这个问题？在此先感谢。
When am passing "00:00:00" it is returning "12 AM" correctly. Can anyone please help me to solve this issue? Thanks in advance.
推荐答案
如果您的时间格式在 24小时，请使用HH：mm：ss格式。请测试代码并告诉我它是否适合您。我已经过测试，它正在返回4 PM
If your time format is in 24hrs please use "HH:mm:ss" format. Please test the code and let me know if it is working for you. I have tested and it is returning "4 PM"
NSString *dats1 = @"16:00:00";
NSDateFormatter *dateFormatter3 = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter3 setDateStyle:NSDateFormatterMediumStyle];
[dateFormatter3 setDateFormat:@"HH:mm:ss"];
NSDate *date1 = [dateFormatter3 dateFromString:dats1];
NSLog(@"date1 : %@", date1); **// Here returning (null)**
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"hh:mm a"];
NSLog(@"Current Date: %@", [formatter stringFromDate:date1]); **// Here also returning (null)**
[formatter release];
谢谢。
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