#import "ViewController.h"

//导入XML解析的头文件GDataXMLNode.h
#import "GDataXMLNode.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 获取xml文件的路径
    NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"book" ofType:@"xml"];
    
    //获取xml文件的二进制数据
    NSData *xmlData = [NSData dataWithContentsOfFile:xmlPath];
    
    //获取xml文件的字符串数据
    NSString *xmlString = [NSString stringWithContentsOfFile:xmlPath encoding:NSUTF8StringEncoding error:nil];
    
    
    //开始解析XML数据
    //创建xml解析器，通过传入xml二进制
//    GDataXMLDocument *xmlDocument = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:nil];
    
    //创建xml解析器，通过传入xml字符串
    GDataXMLDocument *xmlDocument = [[GDataXMLDocument alloc] initWithXMLString:xmlString options:0 error:nil];
    
    //获取根节点
    GDataXMLElement *rootElement = xmlDocument.rootElement;
    NSLog(@"rootElement.name: %@", rootElement.name); //节点名称
    
    //获取所有子节点
    NSArray *children = rootElement.children;
    //遍历所有子节点
    for (GDataXMLElement *childElement in children) {
        //子节点的名称
        NSLog(@"childElement.name:%@", childElement.name);
    }
    
    //获取所有book节点
    NSArray *books = [rootElement elementsForName:@"book"];
    //遍历
    for (GDataXMLElement *bookElement in books) {
        NSLog(@"bookElement.name: %@", bookElement.name);
        
        //取出book节点的子节点title
        GDataXMLElement *titleElement = [[bookElement elementsForName:@"title"] firstObject];
        
        //取出author节点
        GDataXMLElement *authorElement = [[bookElement elementsForName:@"author"] firstObject];
        
        //取出title节点的内容
        NSString *titleValue = [titleElement stringValue];
        NSLog(@"titleValue:%@", titleValue); //打印title节点的内容
        NSLog(@"author:%@", [authorElement stringValue]); //打印author节点的内容
        
        //取出title节点的属性lang
        NSString *langString = [[titleElement attributeForName:@"lang"] stringValue];
        NSLog(@"langString:%@", langString);
        
    }
    
    //通过路径获取所有的title节点
    NSArray *titles = [xmlDocument nodesForXPath:@"/bookstore/book/title" error:nil];
    //遍历
    for (GDataXMLElement *titleElement in titles) {
        NSLog(@"titleElement stringValue: %@", [titleElement stringValue]);
    }
    
    
}

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