Question

I’m writing an App that is parsing Data from an XML-Doc on the web. So when it finishes loading it is supposed to call the Parsing Method as follows.

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
[self startParsingData];

}

This should work in theory, right? Problem is I’m getting this error:

Reciever type ‘ffwDetailViewController’ for instance message does not declare a method with selector ‘startParsing Data’

I take it, that xCode thinks this method doesn’t exist., but it does.

-(void)startParsingData{
NSXMLParser *dataParser = [[NSXMLParser alloc] initWithData:recievedData];
dataParser.delegate = self;
[dataParser parse];

}

I don’t know what to do. I would really appreciate any help.

Switching their Position did the trick. Unfortunately, now the app crashes on pressing the Button. Here’s the full code. I hope you can help me.

- (IBAction)getMissions:(id)sender {

if (recievedData) {
    recievedData = nil;
}
_einsaetze.text=@"Pasing Data...";

NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://oliverengelhardt.de/ffw_app/test.xml"]]
cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

//Start loading Data
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
    recievedData = [NSMutableData data];
}else{
    [_einsaetze setText:@"connection failed"];
}

}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
[recievedData setLength:0];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
if (recievedData) {
    [recievedData appendData:data];
}

}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{

_einsaetze.text=@"connnection failed";

}

-(void)startParsingData{
NSXMLParser *dataParser = [[NSXMLParser alloc] initWithData:recievedData];
dataParser.delegate = self;
[dataParser parse];

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    [self startParsingData];
}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
if ([elementName isEqualToString:@"element"]) {
    NSString *myData = [NSString stringWithFormat:@"%@", [attributeDict objectForKey:@"myData"]];
    _einsaetze.text = myData;
}

}

Answer 1

If -(void)startParsingData is not declared in the @interface section of the class (either in the .h or in an extension in the .m file) then -(void)startParsingData needs to be physically before -(void)connectionDidFinishLoading in the .m file.

What order are they in your .m file?