(Objective-C) Generate ULID

See more ULID/UUID Examples

Generate a ULID using a specified timestamp or the current system date timestamp.

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

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

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

// Set dt to the current system date/time.
[dt SetFromCurrentSystemTime];

// Generate a ULID for the current UTC date/time.
// (i.e. the current UTC UNIX-time)
BOOL utc = YES;
NSString *ulid = [dt UlidGenerate: utc];
NSLog(@"%@",ulid);

// example result: 01GRGCH4J88RECEN4D4VK4F629

// Generate a ULID using the local timezone's current time.
utc = NO;
ulid = [dt UlidGenerate: utc];
NSLog(@"%@",ulid);

// example result: 01GRH14AA82EY9A7S99YYF2QDY

// -----------------------------------------------
// To generate a ULID using a specific UNIX timestamp

// For example, the Unix timestamp for Sun, 05 Feb 2023 14:57:46 GMT
// is 1675609066

// For more information about the Epoch Unix Timestamp, see Epoch Unix Timestamp

// To generate a ULID from a specified date/time, set the CkDateTime and then generate the ULID.
CkoDateTime *dt2 = [[CkoDateTime alloc] init];
utc = YES;
[dt2 SetFromUnixTime: utc t: 1675609066];
ulid = [dt2 UlidGenerate: utc];
NSLog(@"%@",ulid);

// example result: 01GRH1AJGG3P5K04DJHN3QJCX3