Question

I want to make a very simple task in objective-c under IOS5: convert URL string to its escaped representation.

I tried a lot of ways to do it but neither seemed to work.

I can not make stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding work. It converts letters like áíűőüöúóé but does not convert others like =.

I’d like to have a function like Uri.EscapeDataString ( http://msdn.microsoft.com/en-us/library/system.uri.escapedatastring.aspx ) in .net.

Thanks!

Answer 1

You could add a category to NSString that does something like

- (NSString *)ps_stringByAddingPercentEscapes;
{
    return [(NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, 
                                                               (CFStringRef)self, 
                                                               NULL, 
                                                               (CFStringRef)@":/?#[]@!$&’()*+,;=", 
                                                               kCFStringEncodingUTF8) autorelease];
}

Replace @":/?#[]@!$&’()*+,;=" for the chars that you care about.