Swift XML attribute parsing

Question

I have problem with XML parsing in Swift. I woul like to use AttributeDict but i have many attributes to use it. So i use Dictionary. But it's not working, And i use code in this page:

Get attibuteDict of a subclass Xml parsing - Swift

but it's still not working. Tell me if you know My XML Data:

And my not working Code:

@IBOutlet weak var tableView: UITableView!

func parser = NSXMLParser()
var schedule = NSDictionary()
var elements = NSMutableDictionary()
var element = NSString()

func beginParsing()
{
   parser = NSXMLParser(contentsOfURL: NSURL(string: "SomeUrl")!)! 
   parser.delegate = self
   parser.parse()
}

func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: [NSObject : AnyObject]!)
{
   element = elementName
   if (elementName as NSString).isEqualToString("day1")
   {
       //name of subject
       schedule = [p1.1="-", pk1.1="", s1.1="", a1.1="", p1.2="", pk1.2="",
       s1.2="", a1.2="", p1.3="",  pk1.3="", s1.3="", 
       a1.3="", p1.4="", pk1.4="", 
       s1.4="", a1.4="", p1.5="", pk1.5="", s1.5="", 
       a1.5="", p1.6="", pk1.6="", s1.6="", a1.6="", 
       p1.7="", pk1.7="", s1.7="", a1.7="", p1.8="", 
       pk1.8="", s1.8="", a1.8="", p1.9="", 
       pk1.9="", s1.9="", a1.9="", p1.10="", pk1.10="", 
       s1.10="", a1.10=""]

       elements = NSMutableDictionary()
       elements = [:]

  }
}

func parser(parser: NSXMLParser!, foundCharacters string: NSString!)
{
   if element.isEqualToString("day1") {
   func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName: String!, attributes: [NSObject : AnyObject]!) {

           element = elementName
           if (elementName as NSString).isEqual("day1") {

           }
       }
   }
} 


func parser(parser: NSXMLParser!, didEndElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!)
{
   if (elementName as NSString).isEqualToString("day1") {
      print(schedule)
   }`

And i don't create this XML data, this XML data give me my university

Rob · Accepted Answer

A couple of observations:

Your didStartElement should simply look at attributeDict to get the attributes for an element.
You don't need a foundCharacters method in this case, because you're only parsing elements tags, and not parsing anything between the open and close tags.
The foundCharacters method, if you even needed it, shouldn't have a private didStartElement implemented within it.
The only trick in your example is that you have very confusing XML with nested day1 tags. I'd really suggest changing the XML to something that makes sense.

But, if you're stuck with this, one fairly flexible solution is to keep a stack of element names (implemented as simple array, elementNames), push an elementName onto the stack in didStartElement (by adding to the end of the array of elementNames) and popping one off in didEndElement (by calling removeLast). So, for example, by the time you hit the inner day1 tag inside your XML, the array of elementNames will be ["root", "day1", "day1"].

Now that you have that, you can check to see if you are looking at day1 inside another day1 by seeing if the last two items in elementNames are both day1.

For example:

func beginParsing(URL: NSURL) {
    let parser = NSXMLParser(contentsOfURL: URL)!
    parser.delegate = self
    parser.parse()
    print(schedule)
}

var schedule: [String: String]?
var elementNames = [String]()

func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
    elementNames.append(elementName)
    let count = elementNames.count

    if count >= 2 && elementNames[count - 2] == "day1" && elementNames[count - 1] == "day1" {
        schedule = attributeDict
    }
}

func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
    elementNames.removeLast()
}

func parser(parser: NSXMLParser, parseErrorOccurred parseError: NSError) {
    print(parseError)
}

Swift XML attribute parsing

Answers (2)

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