【iOS开发】原生XML解析

初始化方法：

-
initWithContentsOfURL:

Initializes a parser with the XML content referenced by the given URL.

-
initWithData:

 Designated
Initializer

Initializes a parser with the XML contents encapsulated in a given data object.

-
initWithStream:

Initializes a parser with the XML contents from the specified stream and parses it.. 

一个简单的xml文件解析

实例：

.h

#import <Foundation/Foundation.h>

@interface MyXMLParser : NSObject<NSXMLParserDelegate>

@property (nonatomic,strong)  NSMutableArray *
arrM;

-(void)test;

@end

.m

#import "MyXMLParser.h"

#import "Student.h"

@interface MyXMLParser()

{

    NSMutableString * _elementStr;

    Student * student;

}

@end

@implementation MyXMLParser

-(void)test

{

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

    NSXMLParser * parser = [[NSXMLParser alloc]initWithContentsOfURL:[NSURL URLWithString:path]];

    parser.delegate = self;

    [parser parse];

}

#pragma mark  - 解析开始

-(void)parserDidStartDocument:(NSXMLParser *)parser

{

    _arrM = [NSMutableArray array];

    _elementStr = [NSMutableString string];

}

#pragma mark -解析完成

-(void)parserDidEndDocument:(NSXMLParser *)parser

{

    NSLog(@"%@",_arrM);

}

#pragma mark - 

-(void)parser:(NSXMLParser *)parser didStartElement:(nonnull NSString *)elementName
namespaceURI:(nullable NSString *)namespaceURI qualifiedName:(nullable NSString *)qName
attributes:(nonnull NSDictionary<NSString *,NSString *>
*)attributeDict

{

    if ([elementName isEqualToString:@"student"])
{

        student = [[Student alloc]init];

    }

    [_elementStr setString:@""];

}

#pragma mark  循环查找节点内容

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

{

    // 拼接字符串

    [_elementStr appendString:string];

}

#pragma mark 一个节点完成

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

{

    NSString *result = [NSString stringWithString:_elementStr];

    if ([elementName isEqualToString:@"student"])
{

        [_arrM addObject:student];

    } else if ([elementName isEqualToString:@"name"]){

        student.name = result;

    } else if ([elementName isEqualToString:@"sex"])
{

        student.sex = result;

    }

}

#pragma  mark - 出错

-(void)parser:(NSXMLParser *)parser validationErrorOccurred:(NSError *)validationError

{

    [_arrM removeAllObjects];

    NSLog(@"%@",@"出现错误
");

    NSLog(@"%@",validationError.description);

}

@end

其他的代理方法不一一详述