xml数据的解析

<data>
<person age = "15">ZhangSan</person>
<person age = "2">jikexueyuan</person>
<a>
<b>
<c>
</c>
</b>
</a>
</data>

import UIKit

class ViewController: UIViewController,NSXMLParserDelegate{

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//创建xml的解析对象
var parser = NSXMLParser(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("data", ofType: "xml")!))
//通知代理
parser?.delegate = self
//开始解析
parser?.parse()
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//实现代理的方法 来解析数据
var currentNodeName:String?
func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
//获得名字
print(elementName)
currentNodeName = elementName
//获得属性
if elementName == "person"{
//为了以防有的对象没有age的属性 则要对其进行判断 有没有age的属性

if  let  age = attributeDict["age"] {
print("age:\(age)")
}
}
}
//查找当前内容
func parser(parser: NSXMLParser, foundCharacters string: String) {
//避免空格符号的出现
var str = string.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
if str != "" {
print("current Node : \(currentNodeName) value is \(str)")
}
}

}