CFURLCreateStringByAddingPercentEscapes is deprecated in iOS 9, how do I use "stringByAddingPercentEncodingWithAllowedCharacters"

I have the following code:

    return (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)string, NULL, CFSTR(";:@&=+$,/?%#[]"), kCFStringEncodingUTF8);

Xcode says it is deprecated in iOS 9. So, how do I use stringByAddingPercentEncodingWithAllowedCharacters ?

Thanks!