Question

Is there any efficient way to convert an NSDate to RFC 2822 Date format string ?
I want to use this string to create an NSURLRequest and set the value of “If-Modified-Since” header field.

Answer 1

try to use an NSDateFormatter

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; // maybe there exist a new-method now
dateFormatter.dateFormat = @"EEE, dd MMM yyyy HH:mm:ss Z"; //RFC2822-Format
NSString *dateString = [dateFormatter stringFromDate:myDate];