To parse an XML document we begin by creating a class or struct that conforms to the NSXMLParaseDelegate protocol. In our example, we will name the class MyXMLParser. Our MyXMLParser class definition will look like this:
class MyXMLParser: NSObject, NSXMLParserDelegate {
}Within the MyXMLParser class, we will add three properties that will be used by the parser while it is parsing the document. These three properties are:
books: This property will be an optional array that will contain the list of books defined in the XML documentbook: This will be an optional instance of theBookclass that represents the current book being parsed within the XML documentelementData: This will be an instance of the string class that contains the value of the current element that is being parsed
These properties will be defined like this:
var books: [Book]? var book: Book? var elementData = ""
Now we need to add the NSXMLParserDelegate methods. The first one we add will be the parseXmlString...