XML解析
#define urlString @"http://localhost/files/test.xml"
void parseXml1(void)
{
// 1, GDataXMLDocument
// 2, GDataXMLElement
NSData *data = [ NSData dataWithContentsOfURL:[NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
NSError* error=nil;
GDataXMLDocument * doc = [[ GDataXMLDocument alloc]initWithData:data options:0 error:&error];
if (error) {
NSLog(@"%@",error);
return;
}
NSString* xpath1 = @"/root/books";
// 注意: 对document调nodesForXPath:@"/root/books"，返回的是
// root这个节点的孩子列表(数组)
// => 对document调nodesForXPath:@"/root/books/book1",返回
// 的是 books的孩子列表
// => 如果要取某一个节点的值(是字符串),就要先得到该节点的同胞列表,
// 然后根据该节点在列表中的位置取出这个节点并调stringValue方法
// 得到字符串
// obj代表了books这个节点的内容,是多个节点的数组
NSArray* obj = [doc nodesForXPath:xpath1 error:&error];
// NSArray* obj = [[doc rootElement] children];
if (error) {
NSLog(@"%@",error);
return;
}
//可以看到obj的class为 NSArray
NSLog(@"%@", NSStringFromClass([obj class]));
//obj这个数组一共有一个元素,就是代表book1，
NSLog(@"数组的元素个数:%lu", [obj count]);
//obj这个数组的首元素的类型为 GDataXMLElement
NSLog(@"数组的第一个元素为:%@", NSStringFromClass([obj[0] class]));
// 定义一个相对xml路径来取出book1下边的数组
NSString* xpath2 =@"book1";
//用相对xml路径来取数组
NSArray* infoArray = [obj[0] nodesForXPath:xpath2 error:&error];
NSLog(@"infoArray的类型为:%@", NSStringFromClass([infoArray class]));
//infoArray: [ GDataXMLElement类型的元素 ]
NSLog(@"infoArray的元素个数为:%lu", [infoArray count]);
GDataXMLElement* element1 = infoArray[0];
NSLog(@"element1:%@",[element1 stringValue]);
NSArray * array1 = [ obj[0] children];
NSLog(@"obj[0]的孩子列表数组的元素个数:%lu",[array1 count]);
//array2 的4个元素代表book1的四个子节点: name,author, price,summary
NSArray* array2 = [ infoArray[0] children];
NSLog(@"[infoArray[0]的孩子列表数组的元素个数:%lu]",[array2 count]);
NSLog(@"书名为:%@", [array2[0] stringValue]);
NSArray *authorInfoArray = [array2[1] children];
NSLog(@"作者的名字:%@", [authorInfoArray[0] stringValue]);
NSLog(@"作者的性别:%@", [authorInfoArray[1] stringValue]);
NSLog(@"作者的年龄:%@",[authorInfoArray[2] stringValue]);
NSLog(@"作者的地址:%@",[authorInfoArray[3] stringValue]);
NSLog(@"书的价格:%@",[array2[2] stringValue]);
NSLog(@"书的简介:%@", [array2[3] stringValue]);
}
void workForXml(void)
{
NSData* data = [ NSData dataWithContentsOfURL:[NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
NSError* error=nil;
GDataXMLDocument * document = [[ GDataXMLDocument alloc]initWithData:data options:0 error:&error];
if (error) {
NSLog(@"%@",error);
return;
}
// 注意: 对document调nodesForXPath:@"/root/books"，返回的是
// root这个节点的孩子列表(数组)
// => 对document调nodesForXPath:@"/root/books/book1",返回
// 的是 books的的孩子列表
// => 如果要取某一个节点的值(是字符串),就要先得到该节点的同胞列表,
// 然后根据该节点在列表中的位置取出这个节点并调stringValue方法
// 得到字符串
// NSArray* childArrayOfBooks =[[document nodesForXPath:@"/root/books" error:&error][0] children];
GDataXMLElement *booksNode = [[ document rootElement] children][0];
NSArray* childrenOfBooks = [booksNode children];
NSMutableArray * bookModelsArray= [[NSMutableArray alloc]init];
for(NSUInteger i=0;i<[childrenOfBooks count];i++)
{
GDataXMLElement* book = childrenOfBooks[i];
NSArray* childrenOfABook = [book children];
//先取作者信息
NSString* authorName = [[childrenOfABook[1] children][0] stringValue];
NSString* authorSex = [[childrenOfABook[1] children][1] stringValue];
NSString* authorAge=[[childrenOfABook[1] children][2] stringValue];
NSString* authorAddress = [[childrenOfABook[1] children][3] stringValue];
Author* author = [[Author alloc]initWithName:authorName andWithAge:authorAge andWithAddress:authorAddress andSex:authorSex];
//取书名,书价，简介
NSString* bookName = [childrenOfABook[0] stringValue];
NSString* bookPrice = [childrenOfABook[2] stringValue];
NSString* bookSummary = [childrenOfABook[3] stringValue];
Book* bookModel = [[ Book alloc]initWithName:bookName andWithAuthor:author andWithPrice:bookPrice andWithSummary:bookSummary];
[bookModelsArray addObject:bookModel];
}
for(NSUInteger i=0;i<[bookModelsArray count];i++)
{
NSLog(@"书本信息:%@",bookModelsArray[i]);
}
}
