获取完整的XML下载数据 [英] Get the entire XML downloaded data
问题描述
我有一个过时的应用程序,用于下载XML文档并将其解析到iPhone应用程序上,为此我使用了 NSURLConnection
:
I have an outdated application which use to download an XML document and parse it on the iPhone app, I used the NSURLConnection
for that purpose:
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
//NSLog(@"Response :%@",response);
responseData = [[NSMutableString alloc] init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSString *str = [[NSString alloc] initWithData:data
encoding:NSASCIIStringEncoding];
[responseData appendString:str];
[str release];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"DATA : %@",responseData);
if (responseData != nil) {
[self startParsing:responseData];//Parse the data
[responseData release];
}
}
由于开始使用 NSXMLParserDelegate
和 AFXMLRequestOperation
,我无法找出正确获取xml数据的方法:
Since moving to use NSXMLParserDelegate
with AFXMLRequestOperation
, I cannot figure out a way to get xml data properly:
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
[responseData appendString:elementName];
[responseData appendString:namespaceURI];
[responseData appendString:qName];
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
[responseData appendString:string];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
[responseData appendString:elementName];
[responseData appendString:namespaceURI];
[responseData appendString:qName];
}
-(void) parserDidEndDocument:(NSXMLParser *)parser{
[SVProgressHUD showSuccessWithStatus:@"Downloading completed"];
NSLog(@"DATA : %@",responseData);//not properly appended, tags delimeters are missing
if (responseData != nil) {
[self startParsing:responseData];
[responseData release];
}
}
如何附加 responseData
可变字符串中从服务器收到的所有数据?在完成下载后,我调试了收到的数据,并且xml缺少标记分隔符<>
。我想我可能缺少获取xml数据的方法。
How to append all the data received from the server in the responseData
mutable string ? I debugged the data received after finishing downloading and the xml is missing tags delimeters <>
. I think I ma missing the way to get the xml data.
PS:请注意,以 NSMutableString
对象。
@Fermi
我按照您的建议使用了 AFURLConnectionOperation
,它可以很好地实现我的目的,但是我注意到委托方法没有捕获我收到的数据,相反,我可以得到完成块中的数据:
I used AFURLConnectionOperation
as you recommended, it works fine with my purpose, but I noticed that my received data is not catched by the delegate methods, instead I can get the data in a completion block:
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:API_URL]];
AFURLConnectionOperation *operation = [[AFURLConnectionOperation alloc] initWithRequest:request];
operation.completionBlock = ^{
NSLog(@"Complete: %@",operation.responseString);//responseString is my data
};
[operation start];
[SVProgressHUD showWithStatus:@"Downloading files"];
wo因为未调用 NSURLConnection
委托方法,如何管理故障等?谢谢。
wo since NSURLConnection
delegate methods are not called, how can I manage failure, etc? Thanx.
推荐答案
AFXMLRequestOperation
专门用于返回您 NSXMLDocument
实例,而不是原始XML字符串。
AFXMLRequestOperation
is explicitly intended to be used to return you an NSXMLDocument
instance, NOT a raw XML string.
如果要使用XML字符串,请使用 AFURLConnectionOperation
并以与 NSURLConnection
相同的方式构建 NSMutableString
。
If you want the XML string use AFURLConnectionOperation
and build the NSMutableString
the same way you do with NSURLConnection
.
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