Unable to parse date from string using NSDateFormatter [closed]

问题

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.

Closed 6 years ago.

I am stuck for a while parsing date in string using NSDateFormatter

Date in string is in below format

1/1/2011 12:00:00 AM

Below is the code I use to parse

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
[dateFormatter setDateStyle:NSDateFormatterShortStyle];
NSDate *date = [[NSDate alloc]init];
date = [dateFormatter dateFromString:@"1/1/2011 12:00:00 AM"];

This code works with date @"12/31/2011" and format @"MM/dd/yyyy"

Please help

回答1:

use my bellow custom method and parse that date into another format...

-(NSString *)changeDateFormat:(NSString*)stringDate dateFormat:(NSString*)dateFormat getwithFormat:(NSString *)getwithFormat{

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:dateFormat];

    NSDate *date = [dateFormatter dateFromString:stringDate];

    [dateFormatter setDateFormat:getwithFormat];

    NSString *convertedString = [dateFormatter stringFromDate:date];
    //NSLog(@"Converted String : %@",convertedString);
    return convertedString;
}

use this method like bellow..

 NSString *strSDate = [self changeDateFormat:@"1/1/2011 12:00:00 AM" dateFormat:@"dd/MM/yyyy hh:mm:ss a" getwithFormat:@"dd/MM/yyyy"];
 NSLog(@"Converted String : %@",strSDate);

Set any Format which you want in getwithFormat parameter and set format in dateFormat parameter which you have with your Date string...

OUTPUT IS => Converted String : 01/01/2011

回答2:

Try this

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"MM/dd/yyyy HH:mm:ss a"];
//First format date from string
NSDate *date = [dateFormatter dateFromString:@"01/01/2011 12:00:00 AM"];

//Set date formatter to specific format
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
[dateFormatter setDateStyle:NSDateFormatterShortStyle];

//Log the value
NSLog(@"%@",[dateFormatter stringFromDate:date]);

来源：https://stackoverflow.com/questions/16162520/unable-to-parse-date-from-string-using-nsdateformatter