Question

I have a page with JS in my UIWebview which is to send some non-english text to my Obj C code. When I do a NSlog of what I receive in my Obj C code I get garbled output. Can someone see what is wrong here:

JS Code:

window.open("http://nothing.com?ST=nǐ",null);

Obj C code:

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType {

   NSLog([[request URL] absoluteString]);
   return YES;

}

Console output:

http://nothing.com?ST=n㽲79

Answer 1

You use the string as format of NSLog(). With

NSLog(@"%@", [[request URL] absoluteString]);

you will get the expected output.

Detailed explanation: The UTF-8 sequence for ǐ is C7 90. The contents of [[request URL] absoluteString] in shouldStartLoadWithRequest is

http://nothing.com/?ST=n%C7%90

If you use this as format string, the “%C” will be replaced by a random character.

To get rid of the percent escapes, use

NSString *url = [[[request URL] absoluteString] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];