(Objective-C) Extract Timestamp from ULID

See more ULID/UUID Examples

Extract the date/time from a ULID.

Important: Chilkat's ULID functionality was introduced in v9.5.0.94.

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#import <NSString.h>
#import <CkoDateTime.h>

NSString *ulid = @"01GRH14AA82EY9A7S99YYF2QDY";

CkoDateTime *dt = [[CkoDateTime alloc] init];

// Unix timestamps stored in ULIDs should be UTC...
BOOL bLocal = NO;
// Set the CkDateTime from the timestamp contained in the ULID
BOOL success = [dt SetFromUlid: bLocal ulid: ulid];
if (success == NO) {
    NSLog(@"%@",@"ULID was not valid.");
    return;
}

// You can now get the date/time in any desired format.
// For example:
NSLog(@"%@%d",@"Unix timestamp = ",[dt GetAsUnixTime: bLocal]);
NSLog(@"%@%@",@"RFC822 = ",[dt GetAsRfc822: bLocal]);
NSLog(@"%@%@",@"Timestamp = ",[dt GetAsTimestamp: bLocal]);

// Sample output:

// Unix timestamp = 1675608861
// RFC822 = Sun, 05 Feb 2023 14:54:21 GMT
// Timestamp = 2023-02-05T14:54:21Z