title: How can I get a specific attribute from a XML in SWIFT with NSXMLParser
body: <p>I need to retrieve a specific attribute from an <a href="http://api.nea.gov.sg/api/WebAPI/?dataset=psi_update&amp;keyref=781CF461BB6606AD0308169EFFAA82314F88CE06E5BB1E82%3E" rel="nofollow">XML File</a> specifically 
      <code>&lt;reading type="NPSI_PM25_3HR" value="xx"/&gt;</code> under <code>&lt;id&gt;NRS&lt;/id&gt;</code> then parse it as a variable which later I would like to print, but I can not find any way to do this in Swift. Is there any way that I can do this? Thanks!</p>