Parsing

Code syntax is changed in version Swift 3. So, I have updated this article with Xcode 8 – iOS 10

Here is tutorial about how to parse the XML data in Swift Language – iOS 10 – XMLParser
Start with creating object of XMLParser
[code language=”obj-c”]
var parser = XMLParser(contentsOf: urlToSend)!
parser.delegate = self
[/code]
Delegate your class with XMLParserDelegate
[code language=”obj-c”]
class ViewController: UIViewController,XMLParserDelegate {
}
[/code]
Add Delegate methods
[code language=”obj-c”]
func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
}
func parser(_ parser: XMLParser, foundCharacters string: String) {
}
func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
}
[/code]
Parse the XML with following method
[code language=”obj-c”]
parser.parse()
[/code]
Complete sample code:
[code language=”obj-c”]
import UIKit
class ViewController: UIViewController,XMLParserDelegate {
var strXMLData:String = ""
var currentElement:String = ""
var passData:Bool=false
var passName:Bool=false
var parser = XMLParser()
@IBOutlet var lblNameData : UILabel! = nil
override func viewDidLoad() {
super.viewDidLoad()
let url:String="http://api.androidhive.info/pizza/?format=xml"
let urlToSend: URL = URL(string: url)!
// Parse the XML
parser = XMLParser(contentsOf: urlToSend)!
parser.delegate = self
let success:Bool = parser.parse()
if success {
print("parse success!")
print(strXMLData)
lblNameData.text=strXMLData
} else {
print("parse failure!")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
currentElement=elementName;
if(elementName=="id" || elementName=="name" || elementName=="cost" || elementName=="description")
{
if(elementName=="name"){
passName=true;
}
passData=true;
}
}
func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
currentElement="";
if(elementName=="id" || elementName=="name" || elementName=="cost" || elementName=="description")
{
if(elementName=="name"){
passName=false;
}
passData=false;
}
}
func parser(_ parser: XMLParser, foundCharacters string: String) {
if(passName){
strXMLData=strXMLData+"\n\n"+string
}
if(passData)
{
print(string)
}
}
func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
print("failure error: ", parseError)
}
}
[/code]
Code Demo on My Github. Both Swift 2.2 and Swift 3 versions are available.
Helping, Learning, Coding 🙂