XPath表达式无效/错误TFHpple SWIFT 1.2(XPath Expression not working/incorrect TFHpple SWIFT 1.2)

 我想知道你是否可以帮助我。 我正在尝试使用TFHpple来使用Swift 1.2解析HTML数据，但是我在解决XPath表达式方面遇到了问题。 我收到以下错误： 
 
 
 
 可选（ https://www.rac.co.uk/buying-a-car/car-passport/report/buyer/purchase/?BuyerVrm=yg06dxt ） 
 
 
 XPath错误：表达式无效 
 // TD [@类= 'CarMiniProfile-的tableHeader'] / TD 
 
 
 XPath错误：表达式无效// td [@ class ='CarMiniProfile-TableHeader'] / td 
 
 
 2016-03-01 16：26：23.645 CarCamera [1974：63769]无法评估XPath。 空节点!! 
 
 
 我试图使用的XPath代码是 
 
var XPathString = "//td[@class=‘CarMiniProfile-TableHeader’]/td"
 
 我想要获得的信息是所输入汽车的make和model 。 
 
<div>
  <table class="CarMiniProfile-table">
    <tbody>
      <tr class="CarMiniProfile-tableFirstRow">
        <td class="CarMiniProfile-tableHeader">
          Make
        </td>
        <td>
          FIAT
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Model
        </td>
        <td>
          PUNTO SPORTING M-JET
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Colour
        </td>
        <td>
           BLUE
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Year
        </td>
        <td>
          2006
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Engine Size
        </td>
        <td>
          1910 cc
        </td>
      </tr>
    </tbody>
  </table>
</div>
 
 SWIFT代码： 
 
var newURL = NSURL(string: "https://www.rac.co.uk/buying-a-car/car-passport/report/buyer/purchase/?BuyerVrm=\(numberplate)")
var htmlData: NSData = NSData(contentsOfURL: newURL!)!
var Parser = TFHpple(HTMLData: htmlData)
var XPathString = "//td[@class=‘CarMiniProfile-TableHeader’]/td"
var nodes = Parser.searchWithXPathQuery(XPathString) as NSArray

        if(nodes.count == 0 ){
            println("empty nodes!!")
        }else{
            for element in nodes
            {
                println(element.content)
            }
        }

I am wondering if you could help me out. I am trying to use TFHpple to parse HTML data using Swift 1.2, but I am having issues working out the XPath expression. I am getting the following error:
 
 
 
Optional(https://www.rac.co.uk/buying-a-car/car-passport/report/buyer/purchase/?BuyerVrm=yg06dxt) 
 
 
XPath error : Invalid expression
 //td[@class=‘CarMiniProfile-TableHeader’]/td 
 
 
XPath error : Invalid expression //td[@class=‘CarMiniProfile-TableHeader’]/td
 
 
2016-03-01 16:26:23.645 CarCamera[1974:63769] Unable to evaluate XPath. empty nodes!!
 
 
The XPath code I am trying to use is 
 
var XPathString = "//td[@class=‘CarMiniProfile-TableHeader’]/td"
 
The information I am trying to get is the make and model of the car entered. 
 
<div>
  <table class="CarMiniProfile-table">
    <tbody>
      <tr class="CarMiniProfile-tableFirstRow">
        <td class="CarMiniProfile-tableHeader">
          Make
        </td>
        <td>
          FIAT
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Model
        </td>
        <td>
          PUNTO SPORTING M-JET
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Colour
        </td>
        <td>
           BLUE
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Year
        </td>
        <td>
          2006
        </td>
      </tr>
      <tr>
        <td class="CarMiniProfile-tableHeader">
          Engine Size
        </td>
        <td>
          1910 cc
        </td>
      </tr>
    </tbody>
  </table>
</div>
 
Swift code:
 
var newURL = NSURL(string: "https://www.rac.co.uk/buying-a-car/car-passport/report/buyer/purchase/?BuyerVrm=\(numberplate)")
var htmlData: NSData = NSData(contentsOfURL: newURL!)!
var Parser = TFHpple(HTMLData: htmlData)
var XPathString = "//td[@class=‘CarMiniProfile-TableHeader’]/td"
var nodes = Parser.searchWithXPathQuery(XPathString) as NSArray

        if(nodes.count == 0 ){
            println("empty nodes!!")
        }else{
            for element in nodes
            {
                println(element.content)
            }
        }

原文：https://stackoverflow.com/questions/35728317