XML文件解析---SAX方法

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XML文件如下：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<books>

    <book name="book1" num="1" > 出版于1991年 </book>
    <book name="book2" num="2" > 出版于1992年 </book>
    <book name="book3" num="3" > 出版于1993年 </book>
    <book name="book4" num="4" > 出版于1994年 </book>

</books>

解析后的结果：

封装model来接收解析后的XML文件数据

JRBook.h文件

#import <Foundation/Foundation.h>

@interface JRBook : NSObject

//书籍名称
@property (nonatomic,copy)NSString * name;

//书籍数量
@property (nonatomic,assign) NSInteger number;

//出版年份
@property (nonatomic,copy) NSString * punDate;

+ (JRBook *) getBookWithDic:(NSDictionary *) dic;

@end

JRBook.m文件

#import "JRBook.h"

@implementation JRBook

+ (JRBook *) getBookWithDic:(NSDictionary *) dic
{
    JRBook * book=[[JRBook alloc]init];
    book.name=dic[@"name"];
    book.number=[dic[@"num"] integerValue];

    return book;
}

@end

ViewController.m文件

#import "ViewController.h"
#import "JRBook.h"

@interface ViewController () <NSXMLParserDelegate>

{
    JRBook * tempBook;
    NSMutableString * tempPublic;
}

/** 存放model 的数组 */
@property (nonatomic,strong) NSMutableArray * dataArray;

@end

@implementation ViewController
#pragma mark - 懒加载
- (NSMutableArray *) dataArray
{
    if (_dataArray==nil)
    {
        _dataArray=[NSMutableArray array];
    }
    return _dataArray;
}

#pragma mark - 程序入口
- (void)viewDidLoad {
    [super viewDidLoad];

}

#pragma mark - 点击屏幕开始解析XML文件
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{

    //1>>> 初始化parse对象
    NSString * path=[[NSBundle mainBundle]pathForResource:@"xml.xml" ofType:nil];

    NSData * data=[NSData dataWithContentsOfFile:path];

    NSXMLParser * parse=[[NSXMLParser alloc]initWithData:data];


    //2>>> 设置代理,监控解析
    parse.delegate=self;

    //3>>> 开始解析
    [parse parse];

    //4>>>
    for(JRBook * book in self.dataArray)
    {
        NSLog(@"书籍名称: %@-----书籍数量: %li----出版年份：%@",book.name,book.number,book.punDate);
    }

}

#pragma mark - 实现 NSXMLParserDelegate 的代理方法

- (void)parserDidStartDocument:(NSXMLParser *)parser
{
    //NSLog(@"start");
}

- (void)parserDidEndDocument:(NSXMLParser *)parser
{
    //NSLog(@"end");
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if([elementName isEqualToString:@"book"])
    {
        tempPublic=[NSMutableString string];
        tempBook =[JRBook getBookWithDic:attributeDict];
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:@"book"])
    {
        tempBook.punDate=tempPublic;
        [self.dataArray addObject:tempBook];

    }
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    [tempPublic appendString:string];

}

@end

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