XML解析： 系统的。

#import "MyXMLParser.h"
#import "NewsModel.h"

@interface MyXMLParser ()

/** 解析节点的数组 */
@property (nonatomic, strong)NSMutableArray *newsListArray;

/** 当前解析的对象*/
@property (nonatomic, strong)NewsModel *curModel;

/** 当前解析的字符串*/
@property (nonatomic, strong)NSString *curString;

/** 存储解析的结果*/
@property (nonatomic, strong)NSArray *dataArray;

@end

@implementation MyXMLParser

- (NSArray *)parseWithData:(NSData *)data {
    
    //系统的XML解析类
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
    parser.delegate = self;
    
    [parser parse];//调用代理， 解决 问题。
    
    return self.dataArray;
}

#pragma mark - NSXMLParser代理
//节点开始的方法
- (void)parser:(NSXMLParser *)parser didStartElement:(nonnull NSString *)elementName namespaceURI:(nullable NSString *)namespaceURI qualifiedName:(nullable NSString *)qName attributes:(nonnull NSDictionary *)attributeDict{
    
    //elementName是节点的名字
    if ([elementName isEqualToString:@"newslist"]) {
        //创建数组
        //newslist 开始
        // √
        
        self.newsListArray = [NSMutableArray array];
    }else if ([elementName isEqualToString:@"news"]){
        //创建一个对象
        //news 开始
        // †
        
        self.curModel = [[NewsModel alloc] init];   // NewsModel
    }
    
}

//找到字符串的方法
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
    
    self.curString = string;
    // 
    
}

//节点结束的方法
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
    
    if ([elementName isEqualToString:@"newslist"]) {
        // Array
        // -ed
        //newslist 结束
        // √
        
        self.dataArray = self.newsListArray;
        self.newsListArray = nil;
        
    }else if ([elementName isEqualToString:@"news"]) {
        // Array
        // -ing
        //news 结束
        // †
        
        [self.newsListArray addObject:self.curModel];
        self.curModel = nil;
        
    }else{
        
        //给对象的属性赋值
        //NewsModel
        // - ing
        // 
        
        
        if (![elementName isEqualToString:@"newstype"]) {
            NSString *key = elementName;
            if ([key isEqualToString:@"id"]) {
                key = @"newsId";
            }
            //使用KVC赋值
            [self.curModel setValue:self.curString forKey:key];
        }
        
    }
    
}


@end

附： Model

Ø

#import 

@class NewsTypeModel;

@interface NewsModel : NSObject

@property (nonatomic, strong)NSString *newsId;
@property (nonatomic, strong)NSString *title;
@property (nonatomic, strong)NSString *body;

@property (nonatomic, strong)NSString *commentCount;
@property (nonatomic, strong)NSString *author;
@property (nonatomic, strong)NSString *authorid;

@property (nonatomic, strong)NSString *pubDate;
@property (nonatomic, strong)NSString *url;

@property (nonatomic, strong)NewsTypeModel *newstype;



@end


@class GDataXMLElement;

@interface NewsTypeModel : NSObject

@property (nonatomic, strong)NSString *type;
@property (nonatomic, strong)NSString *authoruid2;
@property (nonatomic, strong)NSString *eventurl;


@end