ios - NSXMLParser 访问字符串值错误

Question

我有这样的xml数据

<?xml version="1.0" encoding="UTF-8"?>
<java version="1.6.0_27" class="java.beans.XMLDecoder">
 <object class="java.util.ArrayList">
  <void method="add">
   <object class="impl.DictSpotIndexImpl">
    <void property="englishMeaning">
     <string></string>
    </void>
    <void property="englishWordName">
     <string> dendritical</string>
    </void>
    <void property="tamilMeaning">
     <string>Empty</string>
    </void>
    <void property="tamilWordName">
     <string>மரம் போன்ற வரைததடங்களையுடைய படி அடுக்கியற் பாறை</string>
    </void>
    <void property="wordClass">
     <string>regular</string>
    </void>
    <void property="wordConstraints">
     <string></string>
    </void>
    <void property="wordDataSource">
     <string>Source Not found</string>
    </void>
    <void property="wordImages">
     <string></string>
    </void>
    <void property="wordPopularity">
     <string></string>
    </void>
    <void property="wordTypes">
     <string>பெயரடை</string>
    </void>
   </object>
  </void>
 </object>
</java>

现在我想获取属性 tamilWordName 中的值。我怎样才能做到这一点。？任何建议将不胜感激。

到目前为止我试过这样，真的不知道如何处理属性。

//
//  xmlParser.swift
//  Dictionary
//
//  Created by Alvin Varghese on 27/Oct/14.
//  Copyright (c) 2014 Karky Research Foundation. All rights reserved.
//

import Cocoa

class xmlParser: NSObject, NSXMLParserDelegate
{

    var element : String?

    func doParse(filePath : String)
    {
        var data : NSData = NSData(contentsOfFile: filePath)!

        var xmlParser : NSXMLParser = NSXMLParser(data: data)!
        xmlParser.delegate = self
        var success : Bool = xmlParser.parse()

        if success
        {
        }

    }


    func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [NSObject : AnyObject])
    {
        element = elementName

        if elementName == "void.tamilWordName"
        {
            println(elementName)
        }


    }

    func parser(parser: NSXMLParser, foundCharacters string: String)
    {

    }


    func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String, qualifiedName qName: String)
    {


    }



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

    }





}

Answer 1

这是处理属性的代码片段。

如果元素名称是 void，则必须检查属性。如果存在名称为 property 的属性，请检查该值是否为 tamilWordName。一旦您在层次结构中找到所有元素，设置一个 bool 标志并等待下一个元素进入 didStartElement。只要在 didEndElement 中找到元素名称 void 就处理它们。

func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: [NSObject : AnyObject]!) {
    self.currentElement = elementName  // helper variable to hold the current element

    if elementName == "void" {
        let attrs = attributeDict as [String: NSString]

        if let prop = attrs["property"] {
            if prop == "tamilWordName" {
                // found it, now set a boolean property variable and process the elements coming
                self.tamilWordName = true
            }
        }
    }
}

func parser(parser: NSXMLParser!, foundCharacters string: String!) {
    if currentElement == "string" && self.tamilWordName {
        // append to variable which holds the string
        self.tamilWordString += string
    }        
}

func parser(parser: NSXMLParser!, didEndElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!) {
    if elementName == "string" && self.tamilWordName {
        // string element inside tamilWordName closed, process it here
    }
    else if elementName == "void" && self.tamilWordName {
        // void element with property tamilWordName closed
        self.tamilWordName = false
    }            
}

我希望你能明白这里的意思。