iOS之数据解析之XML解析详解

-(void)xmlDOMMethed{  //盛放所有的字典 self.sourceArray = [NSMutableArray array];  //setp1.得到需要解析的数据  NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"XMLDemo" ofType:@"xml"];  //step2.转换为NSData类型  NSData *xmlData = [NSData dataWithContentsOfFile:xmlPath];  //step3.1 构建document文档对象(options预留参数)  GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:nil];  //step3.2 找到根节点(students)  GDataXMLElement *rootElement = [doc rootElement]; //step3.3 找到根节点的所有子节点  NSArray *allSubNotes = [rootElement elementsForName:@"student"];  //step3.3 找到student节点的所有子节点  for (GDataXMLElement *item in allSubNotes) {    //每次循环开始的时候,说明是一个新的student节点,我们需要字典来盛放它所有的值    NSMutableDictionary *studentDic = [NSMutableDictionary dictionary];    //得到name节点    NSArray *nameArray = [item elementsForName:@"name"];    GDataXMLElement *nameElement = [nameArray objectAtIndex:0];    NSString *name = [nameElement stringValue];    [studentDic setObject:name forKey:@"name"];    //取出age    NSArray *ageArray = [item elementsForName:@"age"];    GDataXMLElement *ageElement = [ageArray objectAtIndex:0];    NSString *age = [ageElement stringValue];    [studentDic setObject:age forKey:@"age"];    //取出sex    NSArray *sexArray = [item elementsForName:@"sex"];    GDataXMLElement *sexElement = [sexArray objectAtIndex:0];    NSString *sex = [sexElement stringValue];    [studentDic setObject:sex forKey:@"sex"];    //把student字典添加到数组中    [self.sourceArray addObject:studentDic];  }NSLog(@"%@",self.sourceArray); }

//通过dom解析方式为xml增加节点 (sax只可以读取，不可以添加)- (void)domAddNote{  //获得文件路径  NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"XMLDemo" ofType:@"xml"];  //将文件转换为data类型  NSData *xmlData = [NSData dataWithContentsOfFile:xmlPath];  GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:nil];  GDataXMLElement *rootElement = [doc rootElement];  //创建一个我们需要添加的节点(student)  GDataXMLElement *createElement = [GDataXMLElement elementWithName:@"student"];  //为student节点添加属性  [createElement addAttribute:[GDataXMLElement attributeWithName:@"attribute" stringValue:@"aa"]];  //为student节点添加子节点  GDataXMLElement *nameNode = [GDataXMLElement elementWithName:@"name" stringValue:@"美丽"];  [createElement addChild:nameNode];  GDataXMLElement *ageNode = [GDataXMLElement elementWithName:@"age" stringValue:@"18"];  [createElement addChild:ageNode];  GDataXMLElement *sexNode = [GDataXMLElement elementWithName:@"sex" stringValue:@"男"];  [createElement addChild:sexNode];  //将创建好的student节点，添加到根节点，也就是students节点下  [rootElement addChild:createElement];  //得到所有的student节点  NSArray *stuElementArray = [rootElement elementsForName:@"student"];  //遍历得到每个student节点，以便获得student的子节点的值。  for (GDataXMLElement* item in stuElementArray) {    //获得student节点的attribute属性值    NSLog(@"%@",[[item attributeForName:@"attribute"] stringValue]);    NSArray *nameArray = [item elementsForName:@"name"];    GDataXMLElement *nameElement = [nameArray objectAtIndex:0];    NSString *name = [nameElement stringValue];    //取出age    NSArray *ageArray = [item elementsForName:@"age"];    GDataXMLElement *ageElement = [ageArray objectAtIndex:0];    NSString *age = [ageElement stringValue];        //取出sex    NSArray *sexArray = [item elementsForName:@"sex"];    GDataXMLElement *sexElement = [sexArray objectAtIndex:0];    NSString *sex = [sexElement stringValue];    NSLog(@"name=%@---age=%@----sex=%@",name,age,sex);  }}

//遵循协议@interface rootViewController ()<NSXMLParserDelegate>

//xml解析之sax解析-(void)xmlSaxMethod{ //得到需要解析的数据 NSString *xmlPath = [[NSBundle mainBundle] pathForResource:@"XMLDemo" ofType:@"xml"]; NSData *xmlData = [NSData dataWithContentsOfFile:xmlPath]; //创建sax解析的工具类对象 NSXMLParser *saxParser = [[NSXMLParser alloc] initWithData:xmlData]; //指定代理 saxParser.delegate = self; //开始解析 sax解析是一个同步的过程 BOOL isParse = [saxParser parse]; if (isParse) {   NSLog(@"解析完成"); }else{   NSLog(@"解析失败"); } NSLog(@"我是在解析结束下面");}

//开始解析的代理方法-(void)parserDidStartDocument:(NSXMLParser *)parser { NSLog(@"开始解析"); self.saxArray = [NSMutableArray array]; }//开始解析某个节点//elementName:标签名称//namespaceURI:命名空间指向的链接//qName:命名空间的名称//attributeDict:节点的所有属性-(void)parser:(NSXMLParser )parser didStartElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName attributes:(NSDictionary<NSString *,NSString *> *)attributeDict { NSLog(@"开始解析%@节点",elementName); //当开始解析student标签的时候,就应该初始化字典,因为一个字典就对应的是一个学生的信息 if ([elementName isEqualToString:@"student"]) {   self.saxDic = [NSMutableDictionary dictionary]; }}//获取节点之间的值-(void)parser:(NSXMLParser )parser foundCharacters:(NSString )string { NSLog(@"取值--------%@",string); if (self.valueString) {//说明有值   [self.valueString appendString:string]; } else {   self.valueString = [NSMutableString stringWithString:string]; }}//某个节点结束取值-(void)parser:(NSXMLParser )parser didEndElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName { if ([elementName isEqualToString:@"name"]) {//说明name节点已经取值结束 [self.saxDic setObject:self.valueString forKey:elementName]; } if ([elementName isEqualToString:@"age"]) { [self.saxDic setObject:self.valueString forKey:elementName]; } if ([elementName isEqualToString:@"sex"]) { [self.saxDic setObject:self.valueString forKey:elementName]; } if ([elementName isEqualToString:@"student"]) { [self.saxArray addObject:self.saxDic]; } self.valueString = nil;//置空 NSLog(@"结束%@节点的解析",elementName);}//结束解析-(void)parserDidEndDocument:(NSXMLParser *)parser { //可以使用解析完成的数据 NSLog(@"%@",self.saxArray); NSLog(@"整个解析结束");}//解析出错-(void)parser:(NSXMLParser )parser parseErrorOccurred:(NSError )parseError { NSLog(@"解析出现错误-------%@",parseError.description);}