vertical pipe symbol not being detected in NSURL

问题

I'm trying to place a search in google dictionary but the url contains a vertical pipe/bar | My code just fails to load the site

 //http://www.google.com/dictionary?aq=f&langpair=en|en&q=test+test+test&hl=en


if ([mySearchEngineName isEqualToString:@"Google Dictionary"]){
        NSLog(@"Currently searching %@ using %@", mySearchString, mySearchEngineName); 

        NSString *mutateSearchString = [mySearchString stringByReplacingOccurrencesOfString:@" " withString:@"+"];
        NSString *searchURL =[NSString stringWithFormat:@"http://www.google.com/dictionary?aq=f&langpair=en|en&q=%@&hl=en", mutateSearchString];
        NSURL *url = [NSURL URLWithString:searchURL];
        [webBrowser loadRequest:[NSURLRequest requestWithURL:url]];
    }

using %7C did not work either..

NSString *searchURL =[NSString stringWithFormat:@"http://www.google.com/dictionary?aq=f&langpair=en%7Cen&q=%@&hl=en", mutateSearchString];

回答1:

Consider encoding your URL using something like:

NSURL *url = [NSURL URLWithString:[searchURL stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]]; 

rather than manually doing it yourself. Perhaps there is some characters in your mySearchString NSString that also needs encoding. Run this encoding after you have stringWithFormat'd the full URL together.

来源：https://stackoverflow.com/questions/6167331/vertical-pipe-symbol-not-being-detected-in-nsurl