Convert UTF-8 encoded NSData to NSString

I have UTF-8 encoded nsdata from windows server. I want to convert it to nsstring for iphone. Since data contains characters(like degree symbol) which have different values on both platforms, how do I convert data to string.

NSPropertyListSerialization returns nil when trying to convert NSDictionary to NSData

I'm trying to convert an NSDictionary to NSData to store in core data, but I am getting a nil value returned to me. error states 'Unknown format option' after the call.

creating an http body with construction method

I am trying to create a http body that I am going to pass in using NSURLRequest post. I have my connection class all set up.

how to encode a UInt32 scalar type into a NSData object

I am currently creating this NSData object. I would like to put in sever different objects that are of type NSString and UInt32. I know how to put a NSString into my NSData object, but I don't know how to do this with a UInt32 scalar type.