There is a class that lets you encode/decode HTML entities. Usage is very simple, just include it in your class. It provides the following methods:
- (NSString *)stringByConvertingHTMLToPlainText;
- (NSString *)stringByDecodingHTMLEntities;
- (NSString *)stringByEncodingHTMLEntities;
So you can do something like:
NSString *convertedString = [responseString stringByDecodingHTMLEntities];