我想要解析子级数据,即 sub_category,并显示它,但只会显示相关的父类别的 sub_category。我已经成功地解析了父元素的数据,但我在如何解析子元素方面遇到了问题。
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if([elementName isEqualToString:@"category"]){
dataCurrent = [dataFileHolder alloc];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
currentList = [[NSMutableString alloc] initWithString:[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if([elementName isEqualToString:@"name"]){
dataCurrent.nameOfCat = currentList;
}
if ([elementName isEqualToString:@"description"]){
dataCurrent.descriptionOfCat = currentList;
}
if ([elementName isEqualToString:@"image"]) {
dataCurrent.imageLink = currentList;
}
if ([elementName isEqualToString:@"category"]) {
[listPopulated addObject:dataCurrent];
dataCurrent = nil;
currentList = nil;
}
}
XML文件如下所示:
<category>
<name>Food</name>
<description>food description</description>
<image> Link Here </image>
<sub_cat>
<sub_name>Sub name</sub_name>
<sub_desc>sub cat description</sub_desc>
<sub_image> Link </sub_image>
</sub_cat>
<sub_cat>
<sub_name>Sub name</sub_name>
<sub_desc>sub cat description</sub_desc>
<sub_image> Link </sub_image>
</sub_cat>
</category>
我一直在研究有关事件驱动的XML解析,并从xml-parse-only-certain-child-elements线程中找到了一个很好的参考资料,但最终我仍然对XML和解析等内容感到相当困惑。我可能需要更简单易懂的术语,并且想知道如何完成我的解析部分。