NSDateFormatter. NSString from NSDate. Convert date to string in iOS.

+(NSString*)convertDateToString:(NSDate *)date;
{ 

    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];

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

    NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];

    [timeFormat setDateFormat:@"HH:mm:ss"];

    NSString *theDate = [dateFormat stringFromDate:date];
    NSString *theTime = [timeFormat stringFromDate:date];
    return theDate;

}