//
// ViewController.m
// XML解析
//
// Created by YIem on 16/2/29.
// Copyright © 2016年 YIem. All rights reserved.
//

import "ViewController.h"

import "Student.h"

@interface ViewController ()<NSXMLParserDelegate>
@property (nonatomic, retain) NSMutableArray *stuArr;
@property (nonatomic, copy) NSString *elementNameStr;
@end

@implementation ViewController

• (void)dealloc
  {

  [_stuArr release];
  [super dealloc];

  }

• (void)viewDidLoad {

  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  self.view.backgroundColor = [UIColor whiteColor];
  UIButton *saxB = [UIButton buttonWithType:UIButtonTypeSystem];
  saxB.frame = CGRectMake(100, 100, 80, 30);
  [saxB setTitle:@"XML解析" forState:UIControlStateNormal];
  [saxB addTarget:self action:@selector(saxAction) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:saxB];

  }

• (void)saxAction
  {

  // 获取文件路径
  NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"xml"];
  // 读取文件内容
  NSData *data = [NSData dataWithContentsOfFile:filePath];
  // XML解析
  NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
  // 协议
  parser.delegate = self;
  // 开始解析
  [parser parse];

  }

// 方法

• (void)parserDidStartDocument:(NSXMLParser *)parser
  {
  NSLog(@"开始解析");
  self.stuArr = [NSMutableArray array];
  }

• (void)parser:(NSXMLParser )parser didStartElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName attributes:(NSDictionary<NSString ,NSString > *)attributeDict
  {
  NSLog(@"只解析开始标签:%@", elementName);
  // 为了在"解析值"的方法内获取到当前的意义(为解析标签值服务)
  self.elementNameStr = elementName;
  // 如开始标签为@"student", 代表是新的一名学生信息, 此时添加新的学生对象
  if ([elementName isEqualToString:@"student"]) {

  Student *stu = [[Student alloc] init];
  [self.stuArr addObject:stu];
  [stu release];

  }
  }

• (void)parser:(NSXMLParser )parser foundCharacters:(NSString )string
  {
  NSLog(@"解析标签值:%@", string);
  // 为最新添加的学生对象设置值
  Student *stu = self.stuArr.lastObject;

  [stu setValue:string forKey:self.elementNameStr];
  }

• (void)parser:(NSXMLParser )parser didEndElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName
  {
  NSLog(@"只解析结束标签:%@", elementName);
  // 数据解析为空(n)的第二种解决办法
  self.elementNameStr = nil;
  }

• (void)parserDidEndDocument:(NSXMLParser *)parser
  {
  NSLog(@"结束解析");
  for (Student *stu in self.stuArr) {

  NSLog(@"%@ %@ %@ %@", stu.number, stu.name, stu.sex, stu.phone);

  }
  }

• (void)parser:(NSXMLParser )parser parseErrorOccurred:(NSError )parseError
  {
  NSLog(@"不可恢复错误");
  }
• (void)didReceiveMemoryWarning {
  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.
  }

@end

//
// Student.h
// XML解析
//
// Created by YIem on 16/2/29.
// Copyright © 2016年 YIem. All rights reserved.
//

import <Foundation/Foundation.h>

@interface Student : NSObject
@property (nonatomic, copy) NSString *number;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSString *sex;
@property (nonatomic, copy) NSString *phone;
@end

//
// Student.m
// XML解析
//
// Created by YIem on 16/2/29.
// Copyright © 2016年 YIem. All rights reserved.
//

import "Student.h"

@implementation Student

• (void)dealloc
  {

  [_number release];
  [_name release];
  [_sex release];
  [_phone release];
  [super dealloc];

  }

• (void)setValue:(id)value forUndefinedKey:(NSString *)key
  {

  }

@end