Mr Jones Mr Jones - 4 months ago 8
Objective-C Question

Posting any text with ampersand "&" back to web service is causing issues

I am posting text with ampersand "&" back to web service and it is causing issues in my Objective C application.

I have to escape it somehow.

Any ideas?... I am very new to Objective C and iPhone programming at the moment...

Answer

This happens when you try to pass some values in the URL and the value contains & which is used to separate parameters in the URL, hence the web server spilts the content into parts wherever it encounters an & rather than taking it as a single continuos value.
You can url encode the string to resolve the problem.

NSString *valueToSubmit = @"This is my value which contains & in it.";
NSString *urlEncodedString  = (NSString*)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL,(CFStringRef)valueToSubmit,NULL,(CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8));
NSLog(@"Non-Encoded: %@ \n Encoded: %@",valueToSubmit,urlEncodedString];

The output will be something like this:

Non-Encoded: This is my value which contains & in it.
URL Encoded: This%20is%20my%20value%20which%20contains%20%26%20in%20it.
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