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在做一些应用的时候经常需要用到XML解析，比如获取Web Service数据，读取RSS新闻或者博客数据源。下面演示了两个非常方便高效的XML库在Swift里的调用方法。
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<?xml version="1.0" encoding="utf-8"?> <Users> <User id="101"> <name>航歌</name> <tel> <mobile>1234567</mobile> <home>025-8100000</home> </tel> </User> <User id="102"> <name>hangge</name> <tel> <mobile>8989889</mobile> <home>025-8122222</home> </tel> </User> </Users> |
我们需要实现的功能是解析并打印出需要的数据：
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User: uid:101,uname:航歌,mobile:1234567,home:025-8100000User: uid:102,uname:hangge,mobile:8989889,home:025-8122222 |
一，使用GDataXML（这个是google出品的）
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#import "GDataXMLNode.h" |
5，导入GDataXML库文件（GDataXMLNode.h和GDataXMLNode.m），代码结构如下：
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import UIKitclass ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. var label:UILabel = UILabel(frame:CGRectMake(100, 100,300,100)); label.text = "输出结果在控制台" self.view.addSubview(label) //测试Swift调用Object的XML库功能 testXML() } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } func testXML() { //获取xml文件路径 var path = NSBundle.mainBundle().pathForResource("users", ofType:"xml") //获取xml文件内容 var xmlData = NSData(contentsOfFile:path!) //可以转换为字符串输出查看 //println(NSString(data:xmlData, encoding:NSUTF8StringEncoding)) //使用NSData对象初始化文档对象 //这里的语法已经把OC的初始化函数直接转换过来了 var doc:GDataXMLDocument = GDataXMLDocument(data:xmlData, options : 0, error : nil) //获取Users节点下的所有User节点，显式转换为element类型编译器就不会警告了 //var users = doc.rootElement().elementsForName("User") as GDataXMLElement[] //通过XPath方式获取Users节点下的所有User节点，在路径复杂时特别方便 var users = doc.nodesForXPath("//User", error:nil) as [GDataXMLElement] for user in users { //User节点的id属性 let uid = user.attributeForName("id").stringValue() //获取name节点元素 let nameElement = user.elementsForName("name")[0] as GDataXMLElement //获取元素的值 let uname = nameElement.stringValue() //获取tel子节点 let telElement = user.elementsForName("tel")[0] as GDataXMLElement //获取tel节点下mobile和home节点 let mobile = (telElement.elementsForName("mobile")[0] as GDataXMLElement).stringValue() let home = (telElement.elementsForName("home")[0] as GDataXMLElement).stringValue() //输出调试信息 println("User: uid:\(uid),uname:\(uname),mobile:\(mobile),home:\(home)") } }} |
示例下载：
GDataXML.zip
二，使用DDXML
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#import "DDXML.h"#import "DDXMLElementAdditions.h" |
5，导入DDXML库文件
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import UIKitclass ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. var label:UILabel = UILabel(frame:CGRectMake(100, 100,300,100)); label.text = "输出结果在控制台" self.view.addSubview(label) //测试Swift调用Object的XML库功能 testXML() } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } func testXML() { //获取xml文件路径 var path = NSBundle.mainBundle().pathForResource("users", ofType:"xml") //获取xml文件内容 var xmlData = NSData(contentsOfFile:path!) //构造XML文档 var doc = DDXMLDocument(data: xmlData, options:0, error:nil) //利用XPath来定位节点（XPath是XML语言中的定位语法，类似于数据库中的SQL功能） var users = doc.nodesForXPath("//User", error:nil) as [DDXMLElement] for user in users { let uid = user.attributeForName("id").stringValue() //DDXMLElementAdditions提供了elementForName获取单个节点，不用获取数组了 let uname = user.elementForName("name").stringValue() //获取tel节点的子节点 let telElement = user.elementForName("tel") as DDXMLElement let mobile = (telElement.elementForName("mobile") as DDXMLElement).stringValue() let home = (telElement.elementForName("home") as DDXMLElement).stringValue() println("User: uid:\(uid),uname:\(uname),mobile:\(mobile),home:\(home)") } }} |
示例下载：DDXML.zip
Swift - 解析XML格式数据（分别使用GDataXML和DDXML）
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原文地址：http://www.cnblogs.com/Free-Thinker/p/4838369.html
