我会创建单独School的和Student对象。您的解析器将具有currentSchool和的属性currentStudent。每当您的解析器命中<Student>标签时，调用
self.currentStudent = [[MyStudentObject alloc] init];
每当您的解析器命中</Student>标签时，调用
self.currentStudent = nil;
然后，当您点击<name>标签时，您可以检查是否有currentStudent. 如果你这样做了，那么这个名字就是那个学生的名字。如果没有当前学生，则名称为学校名称。
if (self.currentStudent)
{
self.currentStudent.name = /*string between <name> tags*/
}
else
{
self.currentSchool.name = /*string between <name> tags*/
}
抱歉，我的代码片段太短了，我现在没有太多时间输入。如果需要更多细节，我可以稍后添加更多代码。
更新
对我来说更详细的最快方法就是显示我正在寻找的代码，并将解释所有内容的注释放入代码中。如果对此有任何疑问，或者需要进一步解释，请告诉我要详细说明的内容，我会尽力而为。
学生XML.h
#import <Foundation/Foundation.h>
@interface StudentXML : NSObject
@property (nonatomic, strong) NSString *ID; // MAKE SURE THIS EXACTLY MATCHES THE ELEMENT IN THE XML!!
@property (nonatomic, strong) NSString *Name; // MAKE SURE THIS EXACTLY MATCHES THE ELEMENT IN THE XML!!
@end
学生XML.m
#import "StudentXML.h"
@implementation StudentXML
@end
SchoolXML.h
#import <Foundation/Foundation.h>
#import "StudentXML.h"
@interface SchoolXML : NSObject
@property (nonatomic, strong) NSString *ID; // MAKE SURE THIS EXACTLY MATCHES THE ELEMENT IN THE XML!!
@property (nonatomic, strong) NSString *Name; // MAKE SURE THIS EXACTLY MATCHES THE ELEMENT IN THE XML!!
@property (nonatomic, strong) NSMutableArray *studentsArray; // Array of StudentXML objects
@end
SchoolXML.m
#import "SchoolXML.h"
@implementation SchoolXML
// Need to overwrite init method so that array is created when new SchoolXML object is created
- (SchoolXML *) init;
{
if (self = [super init])
{
self.studentsArray = [[NSMutableArray alloc] init];
return self;
}
else
{
NSLog(@"Error - SchoolXML object could not be initialized in init on SchoolXML.m");
return nil;
}
}
@end
SchoolsParser.h
#import <Foundation/Foundation.h>
#import "SchoolXML.h"
#import "StudentXML.h"
@interface SchoolsParser : NSObject
{
NSMutableString *currentElementValue; // Will hold the string between tags until we decide where to put it
}
@property (nonatomic, strong) SchoolXML *currentSchool; // Will hold the school that is in the process of being filled
@property (nonatomic, strong) StudentXML *currentStudent; // Will hold the student that is in the process of being filled
@property (nonatomic, strong) NSMutableArray *allSchools; // This is the final list of all the data in the XML file
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict;
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string;
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName;
@end
学校解析器.m
#import "SchoolsParser.h"
@implementation SchoolsParser
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
// This method will be hit each time the parser sees an opening tag
// elementName is the string between the <> (example "School")
{
if ([elementName isEqualToString:@"School"])
{
self.currentSchool = [[SchoolXML alloc] init];
}
else if ([elementName isEqualToString:@"Student"])
{
self.currentStudent = [[StudentXML alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
// This method will be hit each time the parser sees a string between tags
// string is the value between the open and close tag (example "Fairfax High School")
// We take string and hold onto it until we can decide where it should be put
{
currentElementValue = [[NSMutableString alloc] initWithString:string];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
// This method will be hit each time the parser sees an closing tag
// elementName is the string between the </> (example "School")
// This is the method where we decide where we want to put the currentElementValue string
{
if ([elementName isEqualToString:@"Student"])
{
// Put the current student into the studentsArray of the currentSchool
[self.currentSchool.studentsArray addObject:self.currentStudent];
// We've finished building this student and have put it into the school we wanted, so we clear out currentStudent so we can reuse it next time
self.currentStudent = nil;
}
else if ([elementName isEqualToString:@"School"])
{
// Put the current school into the allSchoolsArray to send back to our view controller
[self.allSchools addObject:self.currentSchool];
// We've finished building this school and have put it into the return array, so we clear out currentSchool so we can reuse it next time
self.currentSchool = nil;
}
else if ([elementName isEqualToString:@"Schools"])
{
// We reached the end of the XML document
return;
}
else
// This is either a Name or an ID, so we want to put it into the correct currentSomething we are building
{
if (self.currentStudent)
// There is a currentStudent, so the Name or ID we found is that of a student
{
// Since the properties of our currentStudent object exactly match the elementNames in our XML, the parser can automatically fills values in where they need to be without us doing any more
// For example, it will take "Will Turner" in the <Name> tags in the XML and put it into the .Name property of our student
[self.currentStudent setValue:currentElementValue forKey:elementName];
}
else
// There was no student, so the Name or ID we found is that of a school
{
// Since the properties of our currentStudent object exactly match the elementNames in our XML, the parser can automatically fills values in where they need to be without us doing any more
// For example, it will take "Fairfax High School" in the <Name> tags in the XML and put it into the .Name property of our school
[self.currentSchool setValue:currentElementValue forKey:elementName];
}
}
// We've now put the string in currentElementValue where we wanted it, so we clear out currentElementValue so we can reuse it next time
currentElementValue = nil;
}
-(void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError
{
NSLog(@"Error in SchoolsParser.m");
NSLog(@"%@",parseError.description);
}
@end
您要开始解析的 UIViewController.m（确保您#include使用的是 SchoolXML、StudentXML 和 SchoolsParser）：
- (void) startSchoolParser
{
NSXMLParser *nsXmlParser = [[NSXMLParser alloc] initWithData:responseData]; // where "responseData" is the NSData object that holds your XML
SchoolsParser *parser = [[SchoolsParser alloc] init];
[nsXmlParser setDelegate:parser];
if ([nsXmlParser parse])
{
// Parsing was successful
NSArray *allSchools = parser.allSchools;
// You can now loop through allSchools and use the data how ever you want
// For example, this code just NSLog's all the data
for (SchoolXML *school in allSchools)
{
NSLog(@"School Name = %@",school.Name);
NSLog(@"School ID = %@",school.ID);
for (StudentXML *student in school.studentsArray)
{
NSLog(@"Student Name = %@",student.Name);
NSLog(@"Student ID = %@",student.ID);
}
}
}
else
{
NSLog(@"Parsing Failed");
}
}