How to convert date string to string (yyyy-MM-dd). Doing this am I getting null values?
I have data like customerFromDate "Apr 01 2010" and customerToDate Apr 30 2010 "which is a string.
I want to convert this format to the string "yyyy-MM-dd", but in doing so I got null values. Please have a look at the following code I've tried.
printf("\n customerFromDate %s",[customerStatementObj.customerFromDate UTF8String]);
printf("\n customerToDate %s",[customerStatementObj.customerToDate UTF8String]);
/*
prints as the following
customerFromDate 01 Apr 2010
customerToDate 30 Apr 2010
*/
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *fromDate=[[NSDate alloc]init];
fromDate = [dateFormatter dateFromString:customerStatementObj.customerFromDate];
printf("\n fromDate: %s",[fromDate.description UTF8String]);
NSString *fromDateString=[dateFormatter stringFromDate:fromDate];
printf("\n fromDateString: %s",[fromDateString UTF8String]);
[dateFormatter release];
NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];
[dateFormatter1 setDateFormat:@"yyyy-MM-dd"];
NSDate *toDate=[[NSDate alloc]init];
toDate = [dateFormatter1 dateFromString:customerStatementObj.customerToDate];
printf("\n toDate: %s",[toDate.description UTF8String]);
NSString *toDateString=[dateFormatter1 stringFromDate:toDate];
printf("\n toDateString: %s",[toDateString UTF8String]);
[dateFormatter1 release];
Thank you Madan Mohan.
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1 answer
A few notes:
You need two different NSDateFormatters. One that defines the format of the input date and one that defines the format of the output date.
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setDateFormat:@"dd MMM yyyy"];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy-MM-dd"];
You can reuse these formats for your fromDate
and toDate
.
Second, it dateFromString:
returns a dedicated, auto-implemented NSDate object. You are missing out on the ones that you manually highlight.
#import <Cocoa/Cocoa.h>
int main (int argc, char const *argv[])
{
NSAutoreleasePool *pool = [NSAutoreleasePool new];
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setDateFormat:@"dd MMM yyyy"];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *fromDate = [inputFormatter dateFromString:@"01 Apr 2010"];
NSDate *toDate = [inputFormatter dateFromString:@"30 Apr 2010"];
printf("\n fromDate: %s",[fromDate.description UTF8String]);
NSString *fromDateString=[outputFormatter stringFromDate:fromDate];
printf("\n fromDateString: %s",[fromDateString UTF8String]);
printf("\n toDate: %s",[toDate.description UTF8String]);
NSString *toDateString=[outputFormatter stringFromDate:toDate];
printf("\n toDateString: %s",[toDateString UTF8String]);
[inputFormatter release];
[outputFormatter release];
[pool drain];
return 0;
}
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