xml解析例子

／／以上是xml的内容，我把它存在一个名为 text.xml的文本中

viewcontroller.h文件

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<NSXMLParserDelegate>

@property (strong,nonatomic)IBOutlet UITextView *m_pTextViewResult;

)NSXMLParser *m_pXmlParse;//系统带得 解析的类 即：解析器

)NSMutableString *m_pStrSaxResult;//存解析结果

)NSMutableString *m_pStrSaxTmp;//存解析的临时结果

-(IBAction)btnClickXMLParSEOfSAX:(id)sender;

@end

。m文件

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view,typically from a nib.

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

//按钮关联方法 开始解析

-(IBAction)btnClickXMLParSEOfSAX:(id)sender

{

NSLog(@"%s",__func__);

//*******加载文件

//获取text 路径

NSString *path = [[NSBundle mainBundle]pathForResource:@"text" ofType:@"xml"];

//定义一个文件句柄关联路径

NSFileHandle *file = [NSFileHandle fileHandleForReadingAtPath:path];//读取

//读取数据到data

NSData *data = [file readDataToEndOfFile];

//关闭文件

[file closeFile];

//根据xml数据进行创建解析器 初始化 .m_pXmlParse

self.m_pXmlParse = [[NSXMLParser alloc]initWithData:data];

//设定代理

[self.m_pXmlParse setDelegate:self];//解析器与当前视图建立委托

self.m_pStrSaxResult = [[NSMutableString alloc]init];

self.m_pStrSaxTmp = [[NSMutableString alloc]init];

//通知解析器开始解析，返回一个bool值，标志解析成功或失败

BOOL flag = [self.m_pXmlParse parse];

if (flag) {

[_m_pStrSaxResult appendFormat:@"%@rn",@"获取指定路径的 xml 文件成功"];

}

else

{

获取指定路径的 xml 文件失败"];

}

}

//开始解析

-(void)parserDidStartDocument:(NSXMLParser *)parser

{

NSLog(@"%s",__func__);

[_m_pStrSaxResult appendFormat:@"%@rn",@"开始解析 xml of SAX 文件"];

];

}

//遇到数据时回调，包括空格和回车

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string

{

NSLog(@"%s",__func__);

[_m_pStrSaxTmp setString:@""];

[_m_pStrSaxTmp appendFormat:@"%@",string];

NSLog(@"string = %@",string);

}

//当遇到结束标签时调用

-(void)parser:(NSXMLParser *)parser

didEndElement:(NSString *)elementName //之处理 end 标签

namespaceURI:(NSString *)namespaceURL

qualifiedName:(NSString *)qName

{

NSLog(@"%s",__func__);

if (NSOrderedSame == [elementName compare:@"student"]) {

[_m_pStrSaxResult appendFormat:@"%@n",@"*******student*********"];

}

else if (NSOrderedSame == [elementName compare:@"student_list"])

{

}

else

{

[_m_pStrSaxResult appendFormat:@"%@ = %@rn",elementName,_m_pStrSaxTmp];

}

}

//完成解析xml 文档

-(void)parserDidEndDocument:(NSXMLParser *)parser

{

NSLog(@"%s",__func__);

[_m_pStrSaxResult appendFormat:@"%@",@"解析 xml 文件完成"];

[_m_pTextViewResult setText:_m_pStrSaxResult];

}

@end