基本XML解析---编写

#import "ViewController.h"
#import "DDXML.h"

@interface ViewController ()

@end

@implementation ViewController

/*
 解析XML：开源框架：KissXML  依赖：libxml2.2.dylib(项目配置-->General-->Linked Frameworks and Libraries-->点击+号-->输入libxml2.2.dylib-->add)
 
 如果使用libxml2.2.dylib，则需要在header search path中添加路经：(Build Settings --> Search Paths --> Header Search Paths中添加/usr/include/libxml2-->回车)
 
 */

- (void)viewDidLoad {
    [super viewDidLoad];

//1.组装XML
    [self builXML];
   
    //2.解析XML
    //解析XML的方式：
    //DOM:  当前标签量少的时候
    //SAX:  当前标签量大的时候
    [self parseXML];
}

/**
 <movie country="USA" >  // 主标签：属性：country：USA
 <title>X战警</title>   //子标签title： X战警
 <actor>Bob Dylan</actor> //子标签 actor：  Bob Dylan
 </movie>
*/

//组装XML
- (void)builXML {

//1.创建标签
    DDXMLElement *element = [DDXMLElement elementWithName:@"movie"];
   
    //设置属性
    DDXMLDocument *document = [DDXMLDocument attributeWithName:@"country" stringValue:@"USA"];
    [element addAttribute:document];
   
   
    //2.添加子标签
    DDXMLDocument *title = [DDXMLDocument elementWithName:@"title" stringValue:@"X战警"];
    DDXMLDocument *actor = [DDXMLDocument elementWithName:@"actor" stringValue:@"Bob Dylan"];
   
    [element addChild:title];
    [element addChild:actor];
   
//    NSLog(@"element：%@",element);
}

- (void)parseXML {
 //获取

NSString *filePath = [[NSBundle mainBundle]pathForResource:@"file.xml" ofType:nil];
   
    NSData *data = [NSData dataWithContentsOfFile:filePath];

//解析

DDXMLDocument *doc = [[DDXMLDocument alloc]initWithData:data options:0 error:nil];
    NSLog(@"%@",doc);
    //xml文件中所有的价格
//    NSString *xpath = @"/catalog//price";
    //同上
//    NSString *xpath = @"/catalog/*/price";
   
    // cd下的所有内容
    NSString *xpath = @"//*";

NSArray *arr = [doc nodesForXPath:xpath error:nil];
   
    NSLog(@"--%@",arr);
   
    for (DDXMLElement *element in arr) {
       
        NSLog(@"%@",element.stringValue);

}

}

@end

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//XML文档

<?xml version="1.0" encoding="UTF-8"?>
<catalog>
    <cd1 country="USA">
        <title>Empire Burlesque</title>
        <artist>Bob Dylan</artist>
        <price>10.90</price>
    </cd1>
    <cd2 country="UK">
        <title>Hide your heart</title>
        <artist>Bonnie Tyler</artist>
        <price>9.90</price>
    </cd2>
    <cd3 country="USA">
        <title>Greatest Hits</title>
        <artist>Dolly Parton</artist>
        <price>9.90</price>
    </cd3>

</catalog>