Eliminating the Occurence of junk Values in an NSString? - objective-c

Question

I am getting an XML in the below mentioned Format....
<META NAME="ColdFusionMXEdition" CONTENT="ColdFusion DevNet Edition - Not for Production Use.">
<?xml version="1.0" encoding="UTF-8"?>
<ParticipantService>
<Response>
<FileName>Alzheimers</FileName>
<playlist>
<question answer="t" qno="1" tin="113" title="Aide responds" tout="114"/>
<question answer="t" qno="2" tin="123" title="Receptionist reports problem" tout="126"/>
<question answer="t" qno="3" tin="127" title="Receptionist objects to restraint" tout="130"/>
.............
I am storing the above mentioned XML in the form of an NSString. Now i just want to capture the data starting from
<?xml version="1.0".......
From here i want to Parse the String which doesnt contain the META Tag characters. Can someone please post any alternative here?

Answer 1

You could try something like this:
NSString *parseString = [xmlString substringWithRange:NSMakeRange([xmlString rangeOfString: #"<?xml"].location, ([xmlString length] - [xmlString rangeOfString: #"<?xml"].location))];

Answer 2

NSString has plenty of methods to work with. Here's my solution which is similar to Peter's:
NSString *newString = [xmlString substringFromIndex:[xmlString rangeOfString:#"<?xml"].location];
or if you already have an NSMutableString:
[mutableXMLString deleteCharactersInRange:NSMakeRange(0, [mutableXMLString rangeOfString:#"<?xml"].location)];
Of course, neither solution tackles cases where there isn't any <?xml.