//saxParse
步骤:
1.从包中查找文件路径
NSString *urlString = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"xml"];
2.根据文件路径生成同一资源定位符
NSURL *url = [[NSURL alloc] initFileURLWithPath:urlString];
3.根据生成的统一资源定位符(url), 创建解析类
NSXMLParser *saxParser = [[NSXMLParser alloc] initWithContentsOfURL:url ];
4.设置代理delegate, 因为所有的解析结果都在代理方法中(遵守代理)
saxParser.delegate = self;
5.开始解析
[saxParser parse];
常用的代理中的方法:(6个)
//已经开始解析
- (void)parserDidStartDocument:(NSXMLParser *)parser {
//开始时初始化
self.studentArray = [[NSMutableArray alloc] initWithCapacity:0];
}
//已经结束解析
- (void)parserDidEndDocument:(NSXMLParser *)parser {
NSLog(@"已经结束解析");
NSLog(@"%@", self.studentArray);
}
//解析出错
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
}
//遇到开始标签, 比如<>
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
//elementName, 标签名字, 比如name
//namespaceURI, 命名空间
//qualifiedName, 命名空间的限定
//attributes, 标签的属性, 只能写在开始标签内
}
//遇到结束标签, 比如</>
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
}
//发现字符串
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
self.tempString = string;
}
####################
domParse
步骤:
1.从包中获取文件路径
NSString *urlString = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"xml"];
2.根据文件路径生成url
NSURL *url = [[NSURL alloc] initFileURLWithPath:urlString];
3.根据url, 查找文件, 读取文件内容
NSString *contentString = [[NSString alloc] initWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
[url release];
4.根据文件内容创建Gdata的文档管理类, 及解析完成
GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithXMLString:contentString options:0 error:nil];
5.提取数据
//先找到根节点, Students
GDataXMLElement *rootElement = [document rootElement];
NSLog(@"%@", rootElement);
//找子节点, Student
NSArray *studentElements = [rootElement elementsForName:@"Student"];
NSLog(@"%@", studentElements);
//封装数据
self.studentArray = [NSMutableArray arrayWithCapacity:0];
for (GDataXMLElement *element in studentElements) {
Student *student = [[Student alloc] init];
student.name = [[[element elementsForName:@"name"] firstObject] stringValue];
student.age = [[[element elementsForName:@"age"] firstObject] stringValue];
student.gender = [[[element elementsForName:@"gender"] firstObject] stringValue];
[self.studentArray addObject:student];
[student release];
}
NSLog(@"%@", self.studentArray);
}
##########################################
JSON解析
步骤:
//1.获取路径
NSString *pathString = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"];
//2.根据文件路径, 创建data
NSData *data = [[NSData alloc] initWithContentsOfFile:pathString];
NSLog(@"%@", data);
//3.解析
//参数1:待解析的数据
//参数2:解析的参数配置
//a.NSJSONReadingMutableContainers, 字典或数组是否可变
//b.NSJSONReadingMutableLeaves, 字符串是否可变
//c.NSJSONReadingAllowFragments, 是否允许数据格式不完整
//参数3:解析是否发生错误
NSError *error = nil;
NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
if (error) {
NSLog(@"解析错误%@", error);
} else {
NSLog(@"%@", array);
NSMutableArray *studentArray = [[NSMutableArray alloc] initWithCapacity:0];
for (NSDictionary *dic in array) {
Student *student = [[Student alloc] init];
student.name = [dic valueForKey:@"name"];
student.age = [dic valueForKey:@"age"];
student.gender = [dic valueForKey:@"gender"];
[studentArray addObject:student];
[student release];
}
NSLog(@"%@", studentArray);
}
}
原文：http://www.cnblogs.com/xiaoxuetongxie/p/4404900.html