NSCFDictionary objectForKey unrecognized selector sent to class

Question

After I call a SOAP webservice asynchronously using WSMethodInvocationSetCallBack and WSMethodInvocationScheduleWithRunLoop I get the result in the following callback function and begin parsing it

void wsCallback(WSMethodInvocationRef invocation, void* info, CFDictionaryRef data)
{
const void *data = CFDictionaryGetValue(resultBody, (NSString *)kWSMethodInvocationResult);
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[target methodSignatureForSelector:sel]];
        [invocation setTarget:target];
        [invocation setSelector:sel];
        // Note: Indexes 0 and 1 correspond to the implicit arguments self and _cmd, 
        // which are set using setTarget and setSelector.
        [invocation setArgument:data atIndex:2];
        [invocation invoke];

the invoked selector looks like this:

- (void) result:(void*)data{
NSDictionary *dict = (NSDictionary*)data;
const void *i = [dict objectForKey: @"MethodResult"];
///more stuff
}

on that last line [dict objectForKey...] , I get the unrecognized selector error when clearly it is an NSDictionary. Printing a description of the data pointer just shows NSCFDictionary. Why is this failing?

Answer 1

I decided to scrap the WSMethodInvocation functions and use Cocoa AMF http://github.com/nesium/cocoa-amf

MUCH simpler to work with.

Thanks.