ios UTF8 encoding from nsstring

Question

I am receiving a nsstring that is not properly encoded like "mystring%201, where must be "mystring 1". How could I replace all characters that could be interpreted as UTF8? I read a lot of posts but not a full solution. Please note that nsstring is already encoded wrong and I am not asking about how to encode char sequence. Thank you.

Answer 1

- (NSString *)stringByReplacingPercentEscapesUsingEncoding:(NSStringEncoding)encoding is what you want. basically use it like so:

newString = [myString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

Answer 2

[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]