iOS XML 解析（原生的）

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"
#import "RootViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];

    self.window.rootViewController = [[RootViewController alloc] init];

    [self.window makeKeyAndVisible];
    return YES;
}

@end

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

#import "RootViewController.h"
#import "NoteXMLParser.h"
@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    NoteXMLParser *parser = [[NoteXMLParser alloc] init];
    [parser start];
}

@end

#import <Foundation/Foundation.h>

@interface NoteXMLParser : NSObject<NSXMLParserDelegate>

@property (strong, nonatomic) NSMutableArray *notes;

/**
 *  当前标签的名字，currentTagName 用于存储正在解析的元素名
 */
@property (strong, nonatomic) NSString *currentTagName;

/**
 *  开始解析
 */
- (void)start;

@end

#import "NoteXMLParser.h"

@implementation NoteXMLParser

// 开始解析
- (void)start{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"some" ofType:@"xml"];
    NSURL *url = [NSURL fileURLWithPath:path];

    // 开始解析xml
    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:url];
    parser.delegate = self;

    [parser parse];

}
/**
 *  解析到文档的开头时会调用
 */
- (void)parserDidStartDocument:(NSXMLParser *)parser{
    _notes = [[NSMutableArray alloc] init];
}

/**
 *  解析到一个元素的开始就会调用
 *
 *  @param elementName   元素名字
 *  @param attributeDict 属性字典
 */
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary<NSString *,NSString *> *)attributeDict{
   /* 一般情况，如果数据是这种格式,把内容放到属性中
    <CrReportByHour Hour=@"10" Caption=@"10-12" CrChannel=@"0.8" CrRegion=@"0.6" CrArea=@"0.7"/>
    系统会自动把以上内容转为字典存放到attributeDict这个字典中
    可以用KVC通过字典给模型直接复制(字典中的key必须都能在模型中找到)
    */
    _currentTagName = elementName;
    NSLog(@"====elementName: %@~~~namespaceURI:%@~~~attributeDict=%@---qName=%@",elementName,namespaceURI,attributeDict,qName);
}
// 遇到字符串时触发
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
    //替换回车符 和空格,其中 stringByTrimmingCharactersInSet 是剔除字符的方法,[NSCharacterSet whitespaceAndNewlineCharacterSet]指定字符集为换行符和回车符;
    string = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    if ([_currentTagName isEqualToString:@"Hour"]) {
        NSLog(@"*************string:%@",string);
    }

}
/**
 *  解析到一个元素的结束就会调用
 *  @param elementName  元素名字
 */
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
    NSLog(@"结束的元素名称:%@",elementName);
}
/**
 *  解析到文档的结尾时会调用（解析结束）
 */
- (void)parserDidEndDocument:(NSXMLParser *)parser{
    NSLog(@"结束解析");
}

//文档出错时触发
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{
    NSLog(@"解析出错");
}

@end