NSBundle的pathForResource:ofType: 返回值为nil问题

一、问题描述

在处理XML的过程中，在项目中手动创建名为“data.xml”的文件，加入网上找的内容

<?xml version="1.0" encoding="utf-8"?>

<Dogs>

  <Dog id="001">

      <name>Ryan</name>

      <age>26</age>

  </Dog>

  <Dog id="002">

      <name>Tang</name>

      <age>27</age>

  </Dog>

  <Dog id="003">

      <name>Lee</name>

      <age>24</age>

  </Dog>

</Dogs>

然后xcode加载data.xml中的内容

 -(void)readXML

 {

     //xml文件的路径

     NSString *dataURL = [[NSBundle mainBundle]pathForResource:@"data" ofType:@"xml"];

     //读取xml内容

     NSData *data =  [NSData dataWithContentsOfFile:dataURL];

     GDataXMLDocument *doc = [[GDataXMLDocument alloc]initWithData:data options: error:nil];

     //得到根标签元素Dogs

     GDataXMLElement *rootElement = [doc rootElement];

     //得到根标签元素下的子标签元素Dog

     NSArray *elementsForDogs = [rootElement elementsForName:@"Dog"];

     //遍历

     for (GDataXMLElement *element in elementsForDogs) {

         //id节点

         GDataXMLNode *node = [element attributeForName:@"id"];

         //id节点值

         NSLog(@"Dog的id为%@", [node stringValue]);

         //元素name

         GDataXMLElement *elementName = [[element elementsForName:@"name"] firstObject];

         NSLog(@"名字为%@", [elementName stringValue]);

         //元素age

         GDataXMLElement *elementAge = [[element elementsForName:@"age"] firstObject];

         NSLog(@"年龄为%@", [elementAge stringValue]);

     }

 }