NSURL with special characters

How can I encode this url to be displayed in a UIWebview:

http://de.wikipedia.org/?search=Bevölkerungsentw开发者_如何学运维icklung

I tried:

-stringByAddingPercentEscapesUsingEncoding:NSUnicodeStringEncoding
-stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding

and

CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
                                        (CFStringRef)mobileUrl,
                                        NULL,
                                        (CFStringRef)@"!*'();:@&=+$,/?%#[]",
                                        kCFStringEncodingUTF8);

thanks

joerg

Encode just the search part of the URL string:

// searchString is the unescaped search string, e.g., "Bevölkerungsentwicklung"

NSString *encodedSearchString = [searchString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *urlString = [NSString stringWithFormat:@"http://de.wikipedia.org/?search=%@", encodedSearchString];
NSURL *url = [NSURL URLWithString:urlString];

(Note as well that NSUTF8StringEncoding is the encoding used.)

Just use below sample code;

NSString *urlstring = [NSString stringWithFormat:@"http://de.wikipedia.org/?search=%@", searchString];
NSString *encodedString = [urlstring stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:encodedString];

I found also that for some North European characters, NSISOLatin1StringEncoding fits better. This one gives me a better result

- (void) testEncoding {
    NSString * urlString = @"http://example/path/fileName_blå.pdf";
    urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSISOLatin1StringEncoding];
    NSURL * url = [NSURL URLWithString:urlString];
    NSLog(@"URL: %@", url);
}