如何在苹果手机SDK中更改日期格式

Question

我收到来自 Web 服务日期的响应，例如"2012-08-17T00：00：00"。我只想显示日期，如 17-08-2012。如何更改日期格式并删除该时间...

Answer 1

//String froms web service(ws) 
NSString *stringFromWS =[NSString stringWithString:@"2012-08-17T00:00:00"];

//date formatter for the above string
NSDateFormatter *dateFormatterWS = [[NSDateFormatter alloc] init];
[dateFormatterWS setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"];
NSDate *date =[dateFormatterWS dateFromString:stringFromWS];

//date formatter that you want 
NSDateFormatter *dateFormatterNew = [[NSDateFormatter alloc] init];
[dateFormatterNew setDateFormat:@"dd-MM-yyyy"];
NSString *stringForNewDate = [dateFormatterNew stringFromDate:date];
NSLog(@"Date %@",stringForNewDate);

另请参阅链接以获取更多说明http://mobiledevelopertips.com/cocoa/date-formatters-examples-take-2.html

Answer 2

NSDate *today = [NSDate date];
NSLog(@"Date today: %@", today);
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init] ;
dateFormat.dateFormat =  @"dd-MM-yyyy";
NSString *dateString = [dateFormat stringFromDate:today];
NSLog(@"Date: %@", dateString);

另请参阅以下日期和时间格式样式

NSDateFormatterNoStyle
NSDateFormatterShortStyle
NSDateFormatterMediumStyle
NSDateFormatterLongStyle
NSDateFormatterFullStyle

您可以将其设置为[dateFormat setDateStyle:NSDateFormatterShortStyle];