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POEncoding string arguments for URLs
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copied!<p>I created a method to build URLs for me.</p> <pre><code>- (NSString *)urlFor:(NSString *)path arguments:(NSDictionary *)args { NSString *format = @"http://api.example.com/%@?version=2.0.1"; NSMutableString *url = [NSMutableString stringWithFormat:format, path]; if ([args isKindOfClass:[NSDictionary class]]) { for (NSString *key in args) { [url appendString:[NSString stringWithFormat:@"&%@=%@", key, [args objectForKey:key]]]; } } return url; } </code></pre> <p>When I try to build something like below, the URLs aren't encoded, of course.</p> <pre><code>NSDictionary *args = [NSDictionary dictionaryWithObjectsAndKeys: @"http://other.com", @"url", @"ABCDEF", @"apiKey", nil]; NSLog(@"%@", [self urlFor:@"articles" arguments:args]);` </code></pre> <p>The returned value is <strong><a href="http://api.example.com/articles?version=2.0.1&url=http://other.com&apiKey=ABCDEF" rel="nofollow noreferrer">http://api.example.com/articles?version=2.0.1&url=http://other.com&apiKey=ABCDEF</a></strong> when it should be <strong><a href="http://api.example.com/articles?version=2.0.1&url=http%3A%2F%2Fother.com&apiKey=ABCDEF" rel="nofollow noreferrer">http://api.example.com/articles?version=2.0.1&url=http%3A%2F%2Fother.com&apiKey=ABCDEF</a></strong>.</p> <p>I need to encode both key and value. I searched for something and found <strong>CFURLCreateStringByAddingPercentEscapes</strong> and <strong>stringByAddingPercentEscapesUsingEncoding</strong> but none of the tests I made worked.</p> <p>How can I do it?</p>

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