stringByAddingPercentEscapesUsingEncoding not working with NSStrings with ' 0'

Question

I have been having some problem with the stringByAddingPercentEscapesUsingEncoding: method. Here\'s what happens:

When I try to use the method to conver

Answer 1

This happens when you're trying to encode to NSASCIIStringEncoding a string with characters not supported by ASCII.

Make sure you're encoding to NSUTF8StringEncoding, if the string can contain UTF8 characters or the method would return nil.

Answer 2

For me, this:

NSString *s=[@"..City=Cl&PostalCode=Rh6 0Nt" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(@"s=%@",s);

... outputs:

s=..City=Cl&PostalCode=Rh6%200Nt

You're most likely using the wrong encoding.