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 ()

 //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 *)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); }