NSDate* date = [NSDate date];

        //Create the dateformatter object

        NSDateFormatter* formatter = [[[NSDateFormatter alloc] init] autorelease];

        //Set the required date format

        [formatter setDateFormat:@"yyyy-MM-dd"];

        //Get the string date

        NSString* str = [formatter stringFromDate:date];

        //Display on the console

        NSLog(str);

        //Set in the lable

        [dateLabel setText:str];

http://www.roseindia.net/tutorial/iphone/examples/iphone-Objective-c-date.html

Objective c date: NSString Date

Objective C