Checking for proper xml before parsing in NSXMLParser

If I give non-xml string (or junk xml) to NSXMLP开发者_如何转开发arser it will result in crash. How validate xml before passing it to NSXMLParser?

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it will not crash, if NSXMLParser finds an error, it will let you know through its delegate, either by invoking parser:validationErrorOccurred: or – parser:parseErrorOccurred:. You can use the - (NSError *)parserError in NSXMLParser to determine the error wich caused the parsing to terminate.

I hope it helps you!

Cheers

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Having a validating parser in place can reduce the required code to parse XML a lot, Check the the blog post IPHONE: LIBXML2 & RELAX NG VALIDATION

http://blog.mro.name/2010/05/iphone-libxml2-relax-ng-validation/

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You need to implement following delegate methods for ParseOperation delegate :

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response  


- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data  

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

- (void)connectionDidFinishLoading:(NSURLConnection *)connection