以下是我的Google API请求的XML结果:
<entry gd:kind="shopping#product">
<author>
<name>Bloomingdale's</name>
</author>
<title>7 For All Mankind "Ginger" Wide Leg Jeans in Lightweight Mercer Wash</title>
<s:product>
<s:author>
<s:name>Bloomingdale's</s:name>
<s:accountId>8020</s:accountId>
</s:author>
<s:title>7 For All Mankind "Ginger" Wide Leg Jeans in Lightweight Mercer Wash</s:title>
<s:description>7 for all Mankind "Ginger" jeans in lightweight mercer wash. A wide-leg fit.</s:description>
<s:brand>7 For All Mankind</s:brand>
<s:gtin>12345680753539</s:gtin>
<s:images>
<s:image link="http://images.bloomingdales.com/is/image/BLM/products/2/optimized/1144762_fpx.tif?wid=287&qlt=90"/>
<s:image link="http://1.0.0.0/"/>
<s:image link="http://0.0.0.5/"/>
</s:images>
</s:product>
</entry>
以下是解析XML的NSXMLParser代码:
@implementation ItemViewController
- (void)parser:(NSXMLParser *)parser
didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict
{
if ([elementName isEqual:@"s:product"]) {
NSLog(@"found Product!");
if (!"s:product")
productScanned = [[NSMutableArray alloc] init];
return;
}
if ([elementName isEqual:@"s:gtin"]) {
// set ItemNumber as the GTIN of the productScanned
itemNumber = [[NSMutableString alloc] init];
}
if ([elementName isEqual:@"s:title"]) {
// set ItemDesc as the item description of the productScanned
itemDesc = [[NSMutableString alloc] init];
}
if ([elementName isEqual:@"s:brand"]) {
// set ItemBrand as the brand description of the productScanned
itemBrand = [[NSMutableString alloc] init];
}
if ([elementName isEqual:@"s:name"]) {
// set ItemStore as the store location of the productScanned
itemStore = [[NSMutableString alloc] init];
}
// Create array of Image Tags
if ([elementName isEqual:@"s:images"]) {
NSLog(@"found Images!");
if (!itemImageURLArray)
itemImageURLArray = [[NSMutableArray alloc] init];
return;
if ([elementName isEqualToString:@"s:image"]) {
// itemImagesArray is an NSMutableArray instance variable
if (!itemImagesArray)
itemImagesArray = [[NSMutableArray alloc] init];
NSString *thisLink = [attributeDict objectForKey:@"link"];
if (thisLink)
// do something
return;
}
}
itemImageURL = [itemImagesArray objectAtIndex:0];
}
为什么我的结果会返回除<s:images>
和<s:image>
元素之外的所有元素信息?
更好。帮助我理解为什么我的用于解析<s:images>
的数组没有将这些元素加载到我的*itemImageURL
指针中?
答案 0 :(得分:1)
我认为itemImageURLArray
应该包含网址字符串,而itemImagesArray
包含网址指向的实际图片。
永远不会处理s:image
元素,因为该代码位于if
的{{1}}块内。为s:images
调用didStartElement
时,该代码永远不会运行。将其移至s:image
的{{1}}之外。
此外,在处理if
的代码中,您可能希望将url字符串添加到s:images
数组中。在设置s:image
的行之后,请尝试添加:
itemImageURLArray
至于将图像本身下载到thisLink
,我会在xml解析后作为单独的步骤进行。您可以遍历[itemImageURLArray addObject:thisLink];
并异步下载图像。
顺便说一句,这一行:
itemImagesArray
应该是:
itemImagesArray