objective-c - NSXMLParser findCharacters 返回 "\n "个字符

Question

我有一个 xml 解析器，foundCharacters 回调方法返回如下字符串:

"\n     "
"\n  "

这是我正在解析的 XML 部分，但我在其中的任何位置都没有看到该字符串:

<GetChannelMessages xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices">
  <element p2:type="ToonInDevModel.GetChannelMessagesTest_Result" xmlns:p2="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
    <messageid p2:type="Edm.Int32">15030</messageid>
    <userid p2:type="Edm.Int32">1</userid>
    <Handle xml:space="preserve">Henry     </Handle>
    <Distance p2:type="Edm.Double">16.845658889067568</Distance>
    <MessageDateTime p2:type="Edm.DateTime">2011-07-18T03:14:43.17</MessageDateTime>
    <Message>Posting this message again</Message>
  </element>
  <element p2:type="ToonInDevModel.GetChannelMessagesTest_Result" xmlns:p2="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
    <messageid p2:type="Edm.Int32">15021</messageid>
    <userid p2:type="Edm.Int32">1</userid>
    <Handle xml:space="preserve">Henry     </Handle>
    <Distance p2:type="Edm.Double">16.845658889067568</Distance>
    <MessageDateTime p2:type="Edm.DateTime">2011-07-18T01:45:17.097</MessageDateTime>
    <Message>Posting this message again</Message>
  </element>
  <element p2:type="ToonInDevModel.GetChannelMessagesTest_Result" xmlns:p2="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
    <messageid p2:type="Edm.Int32">15018</messageid>
    <userid p2:type="Edm.Int32">1</userid>
    <Handle xml:space="preserve">Henry     </Handle>
    <Distance p2:type="Edm.Double">16.845658889067568</Distance>
    <MessageDateTime p2:type="Edm.DateTime">2011-07-18T01:33:18.1</MessageDateTime>
    <Message>Posting this message again</Message>
  </element>

此 XML 有问题吗？

Answer 1

这是正常的。

“\n”是换行符。 XML 解析器将告诉您它找到的所有 个字符，甚至元素本身之间的空格和线条。