dose setHTTPBody need an encoding type

dose setHTTPBody need an encoding type if you are passing it a NSMutable data type though a NSData in the method parameter?

Basically I have a method which creates my http body packet along the lines of this

- (void) constructRequest

{

//Create final packet

    NSMutableData * myConstructedMutableDataPacket = [[NSMutableData alloc] init];



    [myConstructedMutableDataPacket appendData:Sig];

    [myConstructedMutableDataPacket appendData:Ver];

//etc



//call connection method

 [self  [self VehicleSearchRequest:myConstructedMutableDataPacket];

} ];

}

then in the connection method is where i declare all my request stuff. Also I am passing the NSMutableData object myConstructedMutableDataPacket over to the NSData parameter of my connection class as listed below.

- (IBAction)VehicleSearchRequest:(NSData *)postBodyData

{

   //all my connection crap



NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0]; //if request dose not finish happen within 60 second timeout.



    [request setHTTPMethod: @"POST"];

    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"];

    [request setHTTPBody:postBodyData]; //Is this okay without encoding type?





    NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];

what I would like to know is if my [request setHTTPBody:postBodyData]; is okay because im passing it an NSData type from the parameter of the method itself..

this is how I have seen it declared in many places.

urlRequest setHTTPBody:[httpBodyString dataUsingEncoding:NSISOLatin1StringEncoding]];